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// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
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// ***************************************************************************************************************************
package org.apache.juneau.dto.swagger;

import static org.apache.juneau.internal.StringUtils.*;
import static org.apache.juneau.internal.ObjectUtils.*;
import static org.apache.juneau.internal.CollectionUtils.*;

import java.util.*;

import org.apache.juneau.annotation.*;
import org.apache.juneau.internal.*;
import org.apache.juneau.utils.*;

/**
 * The Schema Object allows the definition of input and output data types.
 *
 * <p>
 * These types can be objects, but also primitives and arrays.
 * This object is based on the JSON Schema Specification Draft 4 and uses a predefined subset of it.
 * On top of this subset, there are extensions provided by this specification to allow for more complete documentation.
 *
 * <p>
 * Further information about the properties can be found in JSON Schema Core and JSON Schema Validation.
 * Unless stated otherwise, the property definitions follow the JSON Schema specification as referenced here.
 *
 * <h5 class='section'>Example:</h5>
 * <p class='bcode w800'>
 *    <jc>// Construct using SwaggerBuilder.</jc>
 *    SchemaInfo x = <jsm>schemaInfo</jsm>()
 *       .type(<js>"string"</js>)
 *       .title(<js>"foo"</js>)
 *
 *    <jc>// Serialize using JsonSerializer.</jc>
 *    String json = JsonSerializer.<jsf>DEFAULT</jsf>.toString(x);
 *
 *    <jc>// Or just use toString() which does the same as above.</jc>
 *    String json = x.toString();
 * </p>
 * <p class='bcode w800'>
 *    <jc>// Output</jc>
 *    {
 *       <js>"type"</js>: <js>"string"</js>,
 *       <js>"title"</js>: <js>"foo"</js>
 *    }
 * </p>
 *
 * <ul class='seealso'>
 *    <li class='link'>{@doc juneau-dto.Swagger}
 * </ul>
 */
@Bean(bpi="format,title,description,default,multipleOf,maximum,exclusiveMaximum,minimum,exclusiveMinimum,maxLength,minLength,pattern,maxItems,minItems,uniqueItems,maxProperties,minProperties,required,enum,type,items,allOf,properties,additionalProperties,discriminator,readOnly,xml,externalDocs,example,$ref,*")
public class SchemaInfo extends SwaggerElement {

   private String
      format,
      title,
      description,
      pattern,
      type,
      discriminator,
      ref;
   private Number
      multipleOf,
      maximum,
      minimum;
   private Integer
      maxLength,
      minLength,
      maxItems,
      minItems,
      maxProperties,
      minProperties;
   private Boolean
      exclusiveMaximum,
      exclusiveMinimum,
      uniqueItems,
      readOnly;
   private Object
      _default,
      example;
   private Items items;
   private Xml xml;
   private ExternalDocumentation externalDocs;
   private List<Object>
      _enum,
      allOf;
   private List<String>
      required;
   private Map<String,SchemaInfo> properties;
   private SchemaInfo additionalProperties;

   /**
    * Default constructor.
    */
   public SchemaInfo() {}

   /**
    * Copy constructor.
    *
    * @param copyFrom The object to copy.
    */
   public SchemaInfo(SchemaInfo copyFrom) {
      super(copyFrom);

      this.format = copyFrom.format;
      this.title = copyFrom.title;
      this.description = copyFrom.description;
      this.pattern = copyFrom.pattern;
      this.type = copyFrom.type;
      this.discriminator = copyFrom.discriminator;
      this.ref = copyFrom.ref;
      this.multipleOf = copyFrom.multipleOf;
      this.maximum = copyFrom.maximum;
      this.minimum = copyFrom.minimum;
      this.maxLength = copyFrom.maxLength;
      this.minLength = copyFrom.minLength;
      this.maxItems = copyFrom.maxItems;
      this.minItems = copyFrom.minItems;
      this.maxProperties = copyFrom.maxProperties;
      this.minProperties = copyFrom.minProperties;
      this.exclusiveMaximum = copyFrom.exclusiveMaximum;
      this.exclusiveMinimum = copyFrom.exclusiveMinimum;
      this.uniqueItems = copyFrom.uniqueItems;
      this.readOnly = copyFrom.readOnly;
      this._default = copyFrom._default;
      this.example = copyFrom.example;
      this.items = copyFrom.items == null ? null : copyFrom.items.copy();
      this.xml = copyFrom.xml == null ? null : copyFrom.xml.copy();
      this.externalDocs = copyFrom.externalDocs == null ? null : copyFrom.externalDocs.copy();
      this._enum = newList(copyFrom._enum);
      this.allOf = newList(copyFrom.allOf);
      this.required = newList(copyFrom.required);

      if (copyFrom.properties == null) {
         this.properties = null;
      } else {
         this.properties = new LinkedHashMap<>();
         for (Map.Entry<String,SchemaInfo> e : copyFrom.properties.entrySet())
            this.properties.put(e.getKey(), e.getValue().copy());
      }

      this.additionalProperties = copyFrom.additionalProperties == null ? null : copyFrom.additionalProperties.copy();
   }

   /**
    * Make a deep copy of this object.
    *
    * @return A deep copy of this object.
    */
   public SchemaInfo copy() {
      return new SchemaInfo(this);
   }

   /**
    * Bean property getter:  <property>format</property>.
    *
    * <ul class='seealso'>
    *    <li class='extlink'>{@doc SwaggerDataTypeFormats}
    * </ul>
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getFormat() {
      return format;
   }

   /**
    * Bean property setter:  <property>format</property>.
    *
    * <ul class='seealso'>
    *    <li class='extlink'>{@doc SwaggerDataTypes}
    * </ul>
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    *    <br>Formats defined by the OAS include:
    *    <ul>
    *       <li><js>"int32"</js>
    *       <li><js>"int64"</js>
    *       <li><js>"float"</js>
    *       <li><js>"double"</js>
    *       <li><js>"byte"</js>
    *       <li><js>"binary"</js>
    *       <li><js>"date"</js>
    *       <li><js>"date-time"</js>
    *       <li><js>"password"</js>
    *    </ul>
    * @return This object (for method chaining).
    */
   public SchemaInfo setFormat(String value) {
      format = value;
      return this;
   }

   /**
    * Same as {@link #setFormat(String)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-String values will be converted to String using <c>toString()</c>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo format(Object value) {
      return setFormat(stringify(value));
   }

   /**
    * Bean property getter:  <property>title</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getTitle() {
      return title;
   }

   /**
    * Bean property setter:  <property>title</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setTitle(String value) {
      title = value;
      return this;
   }

   /**
    * Same as {@link #setTitle(String)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-String values will be converted to String using <c>toString()</c>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo title(Object value) {
      return setTitle(stringify(value));
   }

   /**
    * Bean property getter:  <property>description</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getDescription() {
      return description;
   }

   /**
    * Bean property setter:  <property>description</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>{@doc GFM} can be used for rich text representation.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setDescription(String value) {
      description = value;
      return this;
   }

   /**
    * Same as {@link #setDescription(String)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-String values will be converted to String using <c>toString()</c>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo description(Object value) {
      return setDescription(stringify(value));
   }

   /**
    * Bean property getter:  <property>default</property>.
    *
    * <p>
    * Unlike JSON Schema, the value MUST conform to the defined type for the Schema Object.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Object getDefault() {
      return _default;
   }

   /**
    * Bean property setter:  <property>default</property>.
    *
    * <p>
    * Unlike JSON Schema, the value MUST conform to the defined type for the Schema Object.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setDefault(Object value) {
      _default = value;
      return this;
   }

   /**
    * Same as {@link #setDefault(Object)}.
    *
    * @param value The new value for this property.
    * @return This object (for method chaining).
    */
   public SchemaInfo _default(Object value) {
      return setDefault(value);
   }

   /**
    * Bean property getter:  <property>multipleOf</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Number getMultipleOf() {
      return multipleOf;
   }

   /**
    * Bean property setter:  <property>multipleOf</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setMultipleOf(Number value) {
      multipleOf = value;
      return this;
   }

   /**
    * Same as {@link #setMultipleOf(Number)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-Number values will be converted to Number using <c>toString()</c> then best number match.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo multipleOf(Object value) {
      return setMultipleOf(toNumber(value));
   }

   /**
    * Bean property getter:  <property>maximum</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Number getMaximum() {
      return maximum;
   }

   /**
    * Bean property setter:  <property>maximum</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setMaximum(Number value) {
      maximum = value;
      return this;
   }

   /**
    * Same as {@link #setMaximum(Number)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-Number values will be converted to Number using <c>toString()</c> then best number match.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo maximum(Object value) {
      return setMaximum(toNumber(value));
   }

   /**
    * Bean property getter:  <property>exclusiveMaximum</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Boolean getExclusiveMaximum() {
      return exclusiveMaximum;
   }

   /**
    * Bean property setter:  <property>exclusiveMaximum</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setExclusiveMaximum(Boolean value) {
      exclusiveMaximum = value;
      return this;
   }

   /**
    * Same as {@link #setExclusiveMaximum(Boolean)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-boolean values will be converted to boolean using <code>Boolean.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo exclusiveMaximum(Object value) {
      return setExclusiveMaximum(toBoolean(value));
   }

   /**
    * Bean property getter:  <property>minimum</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Number getMinimum() {
      return minimum;
   }

   /**
    * Bean property setter:  <property>minimum</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setMinimum(Number value) {
      minimum = value;
      return this;
   }

   /**
    * Same as {@link #setMinimum(Number)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-Number values will be converted to Number using <c>toString()</c> then best number match.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo minimum(Object value) {
      return setMinimum(toNumber(value));
   }

   /**
    * Bean property getter:  <property>exclusiveMinimum</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Boolean getExclusiveMinimum() {
      return exclusiveMinimum;
   }

   /**
    * Bean property setter:  <property>exclusiveMinimum</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setExclusiveMinimum(Boolean value) {
      exclusiveMinimum = value;
      return this;
   }

   /**
    * Same as {@link #setExclusiveMinimum(Boolean)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-boolean values will be converted to boolean using <code>Boolean.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo exclusiveMinimum(Object value) {
      return setExclusiveMinimum(toBoolean(value));
   }

   /**
    * Bean property getter:  <property>maxLength</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Integer getMaxLength() {
      return maxLength;
   }

   /**
    * Bean property setter:  <property>maxLength</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setMaxLength(Integer value) {
      maxLength = value;
      return this;
   }

   /**
    * Same as {@link #setMaxLength(Integer)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-Integer values will be converted to Integer using <code>Integer.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo maxLength(Object value) {
      return setMaxLength(toInteger(value));
   }

   /**
    * Bean property getter:  <property>minLength</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Integer getMinLength() {
      return minLength;
   }

   /**
    * Bean property setter:  <property>minLength</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setMinLength(Integer value) {
      minLength = value;
      return this;
   }

   /**
    * Same as {@link #setMinLength(Integer)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-Integer values will be converted to Integer using <code>Integer.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo minLength(Object value) {
      return setMinLength(toInteger(value));
   }

   /**
    * Bean property getter:  <property>pattern</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getPattern() {
      return pattern;
   }

   /**
    * Bean property setter:  <property>pattern</property>.
    *
    * <p>
    * This string SHOULD be a valid regular expression.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setPattern(String value) {
      pattern = value;
      return this;
   }

   /**
    * Same as {@link #setPattern(String)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-String values will be converted to String using <c>toString()</c>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo pattern(Object value) {
      return setPattern(stringify(value));
   }

   /**
    * Bean property getter:  <property>maxItems</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Integer getMaxItems() {
      return maxItems;
   }

   /**
    * Bean property setter:  <property>maxItems</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setMaxItems(Integer value) {
      maxItems = value;
      return this;
   }

   /**
    * Same as {@link #setMaxItems(Integer)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-Integer values will be converted to Integer using <code>Integer.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo maxItems(Object value) {
      return setMaxItems(toInteger(value));
   }

   /**
    * Bean property getter:  <property>minItems</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Integer getMinItems() {
      return minItems;
   }

   /**
    * Bean property setter:  <property>minItems</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setMinItems(Integer value) {
      minItems = value;
      return this;
   }

   /**
    * Same as {@link #setMinItems(Integer)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-Integer values will be converted to Integer using <code>Integer.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo minItems(Object value) {
      return setMinItems(toInteger(value));
   }

   /**
    * Bean property getter:  <property>uniqueItems</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Boolean getUniqueItems() {
      return uniqueItems;
   }
   /**
    * Bean property setter:  <property>uniqueItems</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setUniqueItems(Boolean value) {
      uniqueItems = value;
      return this;
   }

   /**
    * Same as {@link #setUniqueItems(Boolean)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-boolean values will be converted to boolean using <code>Boolean.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo uniqueItems(Object value) {
      return setUniqueItems(toBoolean(value));
   }

   /**
    * Bean property getter:  <property>maxProperties</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Integer getMaxProperties() {
      return maxProperties;
   }

   /**
    * Bean property setter:  <property>maxProperties</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setMaxProperties(Integer value) {
      maxProperties = value;
      return this;
   }

   /**
    * Same as {@link #setMaxProperties(Integer)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-Integer values will be converted to Integer using <code>Integer.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo maxProperties(Object value) {
      return setMaxProperties(toInteger(value));
   }

   /**
    * Bean property getter:  <property>minProperties</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Integer getMinProperties() {
      return minProperties;
   }

   /**
    * Bean property setter:  <property>minProperties</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setMinProperties(Integer value) {
      minProperties = value;
      return this;
   }

   /**
    * Same as {@link #setMinProperties(Integer)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-Integer values will be converted to Integer using <code>Integer.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo minProperties(Object value) {
      return setMinProperties(toInteger(value));
   }

   /**
    * Bean property getter:  <property>required</property>.
    *
    * <p>
    * The list of required properties.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public List<String> getRequired() {
      return required;
   }

   /**
    * Bean property setter:  <property>required</property>.
    *
    * <p>
    * The list of required properties.
    *
    * @param value
    *    The new value for this property.
    *    <br>Valid values:
    *    <ul>
    *       <li><js>"http"</js>
    *       <li><js>"https"</js>
    *       <li><js>"ws"</js>
    *       <li><js>"wss"</js>
    *    </ul>
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setRequired(Collection<String> value) {
      required = newList(value);
      return this;
   }

   /**
    * Adds one or more values to the <property>required</property> property.
    *
    * <p>
    * The list of required properties.
    *
    * @param value
    *    The values to add to this property.
    *    <br>Ignored if <jk>null</jk>.
    * @return This object (for method chaining).
    */
   public SchemaInfo addRequired(Collection<String> value) {
      required = addToList(required, value);
      return this;
   }

   /**
    * Same as {@link #addRequired(Collection)}.
    *
    * @param values
    *    The new value for this property.
    *    <br>Valid types:
    *    <ul>
    *       <li><c>Collection&lt;String&gt;</c>
    *       <li><c>String</c> - JSON array representation of <c>Collection&lt;String&gt;</c>
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    schemes(<js>"['scheme1','scheme2']"</js>);
    *          </p>
    *       <li><c>String</c> - Individual values
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    schemes(<js>"scheme1</js>, <js>"scheme2"</js>);
    *          </p>
    *    </ul>
    * @return This object (for method chaining).
    */
   public SchemaInfo required(Object...values) {
      required = addToList(required, values, String.class);
      return this;
   }

   /**
    * Bean property getter:  <property>enum</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public List<Object> getEnum() {
      return _enum;
   }

   /**
    * Bean property setter:  <property>enum</property>.
    *
    * <ul class='seealso'>
    *    <li class='extlink'>{@doc JsonSchemaValidation}
    * </ul>
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setEnum(Collection<Object> value) {
      _enum = newList(value);
      return this;
   }

   /**
    * Adds one or more values to the <property>enum</property> property.
    *
    * @param value
    *    The values to add to this property.
    *    <br>Ignored if <jk>null</jk>.
    * @return This object (for method chaining).
    */
   public SchemaInfo addEnum(Collection<Object> value) {
      _enum = addToList(_enum, value);
      return this;
   }

   /**
    * Adds one or more values to the <property>enum</property> property.
    *
    * @param values
    *    The values to add to this property.
    *    <br>Valid types:
    *    <ul>
    *       <li><c>Object</c>
    *       <li><c>Collection&lt;Object&gt;</c>
    *       <li><c>String</c> - JSON array representation of <c>Collection&lt;Object&gt;</c>
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    _enum(<js>"['foo','bar']"</js>);
    *          </p>
    *       <li><c>String</c> - Individual values
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    _enum(<js>"foo"</js>, <js>"bar"</js>);
    *          </p>
    *    </ul>
    *    <br>Ignored if <jk>null</jk>.
    * @return This object (for method chaining).
    */
   public SchemaInfo _enum(Object...values) {
      _enum = addToList(_enum, values, Object.class);
      return this;
   }

   /**
    * Bean property getter:  <property>type</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getType() {
      return type;
   }

   /**
    * Bean property setter:  <property>type</property>.
    *
    * <ul class='seealso'>
    *    <li class='extlink'>{@doc SwaggerDataTypes}
    * </ul>
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    *    <br>Possible values include:
    *    <ul>
    *       <li><js>"object"</js>
    *       <li><js>"string"</js>
    *       <li><js>"number"</js>
    *       <li><js>"integer"</js>
    *       <li><js>"boolean"</js>
    *       <li><js>"array"</js>
    *       <li><js>"file"</js>
    *    </ul>
    * @return This object (for method chaining).
    */
   public SchemaInfo setType(String value) {
      type = value;
      return this;
   }

   /**
    * Same as {@link #setType(String)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-String values will be converted to String using <c>toString()</c>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo type(Object value) {
      return setType(stringify(value));
   }

   /**
    * Bean property getter:  <property>items</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Items getItems() {
      return items;
   }

   /**
    * Bean property setter:  <property>items</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setItems(Items value) {
      items = value;
      return this;
   }

   /**
    * Same as {@link #setItems(Items)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Valid types:
    *    <ul>
    *       <li>{@link Items}
    *       <li><c>String</c> - JSON object representation of {@link Items}
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    items(<js>"{type:'type',format:'format',...}"</js>);
    *          </p>
    *    </ul>
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo items(Object value) {
      return setItems(toType(value, Items.class));
   }

   /**
    * Bean property getter:  <property>allOf</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public List<Object> getAllOf() {
      return allOf;
   }

   /**
    * Bean property setter:  <property>allOf</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setAllOf(Collection<Object> value) {
      allOf = newList(value);
      return this;
   }

   /**
    * Adds one or more values to the <property>allOf</property> property.
    *
    * @param values
    *    The values to add to this property.
    *    <br>Ignored if <jk>null</jk>.
    * @return This object (for method chaining).
    */
   public SchemaInfo addAllOf(Collection<Object> values) {
      allOf = addToList(allOf, values);
      return this;
   }

   /**
    * Adds one or more values to the <property>allOf</property> property.
    *
    * @param values
    *    The values to add to this property.
    *    <br>Valid types:
    *    <ul>
    *       <li><c>Object</c>
    *       <li><c>Collection&lt;Object&gt;</c>
    *       <li><c>String</c> - JSON array representation of <c>Collection&lt;Object&gt;</c>
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    allOf(<js>"['foo','bar']"</js>);
    *          </p>
    *       <li><c>String</c> - Individual values
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    allOf(<js>"foo"</js>, <js>"bar"</js>);
    *          </p>
    *    </ul>
    *    <br>Ignored if <jk>null</jk>.
    * @return This object (for method chaining).
    */
   public SchemaInfo allOf(Object...values) {
      allOf = addToList(allOf, values, Object.class);
      return this;
   }

   /**
    * Bean property getter:  <property>properties</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Map<String,SchemaInfo> getProperties() {
      return properties;
   }

   /**
    * Bean property setter:  <property>properties</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setProperties(Map<String,SchemaInfo> value) {
      properties = newMap(value);
      return this;
   }

   /**
    * Adds one or more values to the <property>properties</property> property.
    *
    * @param values
    *    The values to add to this property.
    *    <br>Ignored if <jk>null</jk>.
    * @return This object (for method chaining).
    */
   public SchemaInfo addProperties(Map<String,SchemaInfo> values) {
      properties = addToMap(properties, values);
      return this;
   }

   /**
    * Adds one or more values to the <property>properties</property> property.
    *
    * @param values
    *    The values to add to this property.
    *    <br>Valid types:
    *    <ul>
    *       <li><c>Map&lt;String,Map&lt;String,Object&gt;&gt;</c>
    *       <li><c>String</c> - JSON object representation of <c>Map&lt;String,Map&lt;String,Object&gt;&gt;</c>
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    properties(<js>"{name:{foo:'bar'}}"</js>);
    *          </p>
    *    </ul>
    *    <br>Ignored if <jk>null</jk>.
    * @return This object (for method chaining).
    */
   public SchemaInfo properties(Object...values) {
      properties = addToMap(properties, values, String.class, SchemaInfo.class);
      return this;
   }

   /**
    * Bean property getter:  <property>additionalProperties</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public SchemaInfo getAdditionalProperties() {
      return additionalProperties;
   }

   /**
    * Bean property setter:  <property>additionalProperties</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setAdditionalProperties(SchemaInfo value) {
      additionalProperties = value;
      return this;
   }

   /**
    * Bean property setter:  <property>additionalProperties</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo additionalProperties(Object value) {
      additionalProperties = toType(value, SchemaInfo.class);
      return this;
   }

   /**
    * Bean property getter:  <property>discriminator</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getDiscriminator() {
      return discriminator;
   }

   /**
    * Bean property setter:  <property>discriminator</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setDiscriminator(String value) {
      discriminator = value;
      return this;
   }

   /**
    * Same as {@link #setDiscriminator(String)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-String values will be converted to String using <c>toString()</c>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo discriminator(Object value) {
      return setDiscriminator(stringify(value));
   }

   /**
    * Bean property getter:  <property>readOnly</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Boolean getReadOnly() {
      return readOnly;
   }

   /**
    * Bean property setter:  <property>readOnly</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setReadOnly(Boolean value) {
      readOnly = value;
      return this;
   }

   /**
    * Same as {@link #setReadOnly(Boolean)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Non-boolean values will be converted to boolean using <code>Boolean.<jsm>valueOf</jsm>(value.toString())</code>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo readOnly(Object value) {
      return setReadOnly(toBoolean(value));
   }

   /**
    * Bean property getter:  <property>xml</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Xml getXml() {
      return xml;
   }

   /**
    * Bean property setter:  <property>xml</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setXml(Xml value) {
      xml = value;
      return this;
   }

   /**
    * Same as {@link #setXml(Xml)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Valid types:
    *    <ul>
    *       <li>{@link Xml}
    *       <li><c>String</c> - JSON object representation of {@link Xml}
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    xml(<js>"{name:'name',namespace:'namespace',...}"</js>);
    *          </p>
    *    </ul>
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo xml(Object value) {
      return setXml(toType(value, Xml.class));
   }

   /**
    * Bean property getter:  <property>externalDocs</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public ExternalDocumentation getExternalDocs() {
      return externalDocs;
   }

   /**
    * Bean property setter:  <property>externalDocs</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setExternalDocs(ExternalDocumentation value) {
      externalDocs = value;
      return this;
   }

   /**
    * Same as {@link #setExternalDocs(ExternalDocumentation)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Valid types:
    *    <ul>
    *       <li>{@link ExternalDocumentation}
    *       <li><c>String</c> - JSON object representation of {@link ExternalDocumentation}
    *          <p class='bcode w800'>
    *    <jc>// Example </jc>
    *    externalDocs(<js>"{description:'description',url:'url'}"</js>);
    *          </p>
    *    </ul>
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo externalDocs(Object value) {
      return setExternalDocs(toType(value, ExternalDocumentation.class));
   }

   /**
    * Bean property getter:  <property>example</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Object getExample() {
      return example;
   }

   /**
    * Bean property setter:  <property>example</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo setExample(Object value) {
      example = value;
      return this;
   }

   /**
    * Same as {@link #setExample(Object)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo example(Object value) {
      return setExample(value);
   }

   /**
    * Bean property getter:  <property>$ref</property>.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   @Beanp("$ref")
   public String getRef() {
      return ref;
   }

   /**
    * Returns <jk>true</jk> if this object has a <js>"$ref"</js> attribute.
    *
    * @return <jk>true</jk> if this object has a <js>"$ref"</js> attribute.
    */
   public boolean hasRef() {
      return ref != null;
   }

   /**
    * Bean property setter:  <property>$ref</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   @Beanp("$ref")
   public SchemaInfo setRef(Object value) {
      ref = StringUtils.stringify(value);
      return this;
   }

   /**
    * Same as {@link #setRef(Object)}.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object (for method chaining).
    */
   public SchemaInfo ref(Object value) {
      return setRef(value);
   }

   @Override /* SwaggerElement */
   public <T> T get(String property, Class<T> type) {
      if (property == null)
         return null;
      switch (property) {
         case "format": return toType(getFormat(), type);
         case "title": return toType(getTitle(), type);
         case "description": return toType(getDescription(), type);
         case "default": return toType(getDefault(), type);
         case "multipleOf": return toType(getMultipleOf(), type);
         case "maximum": return toType(getMaximum(), type);
         case "exclusiveMaximum": return toType(getExclusiveMaximum(), type);
         case "minimum": return toType(getMinimum(), type);
         case "exclusiveMinimum": return toType(getExclusiveMinimum(), type);
         case "maxLength": return toType(getMaxLength(), type);
         case "minLength": return toType(getMinLength(), type);
         case "pattern": return toType(getPattern(), type);
         case "maxItems": return toType(getMaxItems(), type);
         case "minItems": return toType(getMinItems(), type);
         case "uniqueItems": return toType(getUniqueItems(), type);
         case "maxProperties": return toType(getMaxProperties(), type);
         case "minProperties": return toType(getMinProperties(), type);
         case "required": return toType(getRequired(), type);
         case "enum": return toType(getEnum(), type);
         case "type": return toType(getType(), type);
         case "items": return toType(getItems(), type);
         case "allOf": return toType(getAllOf(), type);
         case "properties": return toType(getProperties(), type);
         case "additionalProperties": return toType(getAdditionalProperties(), type);
         case "discriminator": return toType(getDiscriminator(), type);
         case "readOnly": return toType(getReadOnly(), type);
         case "xml": return toType(getXml(), type);
         case "externalDocs": return toType(getExternalDocs(), type);
         case "example": return toType(getExample(), type);
         case "$ref": return toType(getRef(), type);
         default: return super.get(property, type);
      }
   }

   @Override /* SwaggerElement */
   public SchemaInfo set(String property, Object value) {
      if (property == null)
         return this;
      switch (property) {
         case "format": return format(value);
         case "title": return title(value);
         case "description": return description(value);
         case "default": return _default(value);
         case "multipleOf": return multipleOf(value);
         case "maximum": return maximum(value);
         case "exclusiveMaximum": return exclusiveMaximum(value);
         case "minimum": return minimum(value);
         case "exclusiveMinimum": return exclusiveMinimum(value);
         case "maxLength": return maxLength(value);
         case "minLength": return minLength(value);
         case "pattern": return pattern(value);
         case "maxItems": return maxItems(value);
         case "minItems": return minItems(value);
         case "uniqueItems": return uniqueItems(value);
         case "maxProperties": return maxProperties(value);
         case "minProperties": return minProperties(value);
         case "required": return setRequired(null).required(value);
         case "enum": return setEnum(null)._enum(value);
         case "type": return type(value);
         case "items": return items(value);
         case "allOf": return setAllOf(null).allOf(value);
         case "properties": return setProperties(null).properties(value);
         case "additionalProperties": return additionalProperties(value);
         case "discriminator": return discriminator(value);
         case "readOnly": return readOnly(value);
         case "xml": return xml(value);
         case "externalDocs": return externalDocs(value);
         case "example": return example(value);
         case "$ref": return ref(value);
         default:
            super.set(property, value);
            return this;
      }
   }

   @Override /* SwaggerElement */
   public Set<String> keySet() {
      ASet<String> s = new ASet<String>()
         .appendIf(format != null, "format")
         .appendIf(title != null, "title")
         .appendIf(description != null, "description")
         .appendIf(_default != null, "default")
         .appendIf(multipleOf != null, "multipleOf")
         .appendIf(maximum != null, "maximum")
         .appendIf(exclusiveMaximum != null, "exclusiveMaximum")
         .appendIf(minimum != null, "minimum")
         .appendIf(exclusiveMinimum != null, "exclusiveMinimum")
         .appendIf(maxLength != null, "maxLength")
         .appendIf(minLength != null, "minLength")
         .appendIf(pattern != null, "pattern")
         .appendIf(maxItems != null, "maxItems")
         .appendIf(minItems != null, "minItems")
         .appendIf(uniqueItems != null, "uniqueItems")
         .appendIf(maxProperties != null, "maxProperties")
         .appendIf(minProperties != null, "minProperties")
         .appendIf(required != null, "required")
         .appendIf(_enum != null, "enum")
         .appendIf(type != null, "type")
         .appendIf(items != null, "items")
         .appendIf(allOf != null, "allOf")
         .appendIf(properties != null, "properties")
         .appendIf(additionalProperties != null, "additionalProperties")
         .appendIf(discriminator != null, "discriminator")
         .appendIf(readOnly != null, "readOnly")
         .appendIf(xml != null, "xml")
         .appendIf(externalDocs != null, "externalDocs")
         .appendIf(example != null, "example")
         .appendIf(ref != null, "$ref");
      return new MultiSet<>(s, super.keySet());
   }



   /**
    * Returns <jk>true</jk> if this schema info has one or more properties defined on it.
    *
    * @return <jk>true</jk> if this schema info has one or more properties defined on it.
    */
   public boolean hasProperties() {
      return properties != null && ! properties.isEmpty();
   }

   /**
    * Resolves any <js>"$ref"</js> attributes in this element.
    *
    * @param swagger The swagger document containing the definitions.
    * @param refStack Keeps track of previously-visited references so that we don't cause recursive loops.
    * @param maxDepth
    *    The maximum depth to resolve references.
    *    <br>After that level is reached, <c>$ref</c> references will be left alone.
    *    <br>Useful if you have very complex models and you don't want your swagger page to be overly-complex.
    * @return
    *    This object with references resolved.
    *    <br>May or may not be the same object.
    */
   public SchemaInfo resolveRefs(Swagger swagger, Deque<String> refStack, int maxDepth) {

      if (ref != null) {
         if (refStack.contains(ref) || refStack.size() >= maxDepth)
            return this;
         refStack.addLast(ref);
         SchemaInfo r = swagger.findRef(ref, SchemaInfo.class).resolveRefs(swagger, refStack, maxDepth);
         refStack.removeLast();
         return r;
      }

      if (items != null)
         items = items.resolveRefs(swagger, refStack, maxDepth);

      if (properties != null)
         for (Map.Entry<String,SchemaInfo> e : properties.entrySet())
            e.setValue(e.getValue().resolveRefs(swagger, refStack, maxDepth));

      if (additionalProperties != null)
         additionalProperties = additionalProperties.resolveRefs(swagger, refStack, maxDepth);

      this.example = null;

      return this;
   }
}