/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.juneau.bean.swagger;

import static org.apache.juneau.commons.utils.AssertionUtils.*;
import static org.apache.juneau.commons.utils.CollectionUtils.*;
import static org.apache.juneau.commons.utils.ThrowableUtils.*;
import static org.apache.juneau.commons.utils.Utils.*;
import static org.apache.juneau.internal.ConverterUtils.*;

import java.util.*;

import org.apache.juneau.commons.collections.*;
import org.apache.juneau.marshaller.*;

/**
 * Describes a single operation parameter.
 *
 * <p>
 * The Parameter Object describes a single parameter used in a Swagger 2.0 API operation. A unique parameter is
 * defined by a combination of a name and location (in). Parameters can be passed in various locations including
 * the path, query string, headers, body, or form data.
 *
 * <h5 class='section'>Swagger Specification:</h5>
 * <p>
 * The Parameter Object supports the following fields:
 * <ul class='spaced-list'>
 *    <li><c>name</c> (string, REQUIRED) - The name of the parameter
 *    <li><c>in</c> (string, REQUIRED) - The location of the parameter. Possible values: <js>"path"</js>, <js>"query"</js>, <js>"header"</js>, <js>"body"</js>, or <js>"formData"</js>
 *    <li><c>description</c> (string) - A brief description of the parameter
 *    <li><c>required</c> (boolean) - Determines whether this parameter is mandatory (must be <jk>true</jk> if <c>in</c> is <js>"path"</js>)
 *    <li><c>schema</c> ({@link SchemaInfo}) - The schema defining the type used for the body parameter (only if <c>in</c> is <js>"body"</js>)
 *    <li><c>type</c> (string) - The type of the parameter (for non-body parameters). Values: <js>"string"</js>, <js>"number"</js>, <js>"integer"</js>, <js>"boolean"</js>, <js>"array"</js>, <js>"file"</js>
 *    <li><c>format</c> (string) - The format modifier (e.g., <js>"int32"</js>, <js>"int64"</js>, <js>"float"</js>, <js>"double"</js>, <js>"date"</js>, <js>"date-time"</js>)
 *    <li><c>allowEmptyValue</c> (boolean) - Sets the ability to pass empty-valued parameters (valid only for <js>"query"</js> or <js>"formData"</js> parameters)
 *    <li><c>items</c> ({@link Items}) - Required if type is <js>"array"</js>. Describes the type of items in the array
 *    <li><c>collectionFormat</c> (string) - How multiple values are formatted. Values: <js>"csv"</js>, <js>"ssv"</js>, <js>"tsv"</js>, <js>"pipes"</js>, <js>"multi"</js>
 *    <li><c>default</c> (any) - The default value
 *    <li><c>maximum</c> (number), <c>exclusiveMaximum</c> (boolean), <c>minimum</c> (number), <c>exclusiveMinimum</c> (boolean) - Numeric constraints
 *    <li><c>maxLength</c> (integer), <c>minLength</c> (integer), <c>pattern</c> (string) - String constraints
 *    <li><c>maxItems</c> (integer), <c>minItems</c> (integer), <c>uniqueItems</c> (boolean) - Array constraints
 *    <li><c>enum</c> (array) - Possible values for this parameter
 *    <li><c>multipleOf</c> (number) - Must be a multiple of this value
 * </ul>
 *
 * <p>
 * There are five possible parameter types (determined by the <c>in</c> field):
 * <ul class='spaced-list'>
 *    <li><js>"path"</js> - Used together with Path Templating, where the parameter value is actually part of the
 *       operation's URL.
 *       This does not include the host or base path of the API.
 *       For example, in <c>/items/{itemId}</c>, the path parameter is <c>itemId</c>.
 *    <li><js>"query"</js> - Parameters that are appended to the URL.
 *       For example, in <c>/items?id=###</c>, the query parameter is <c>id</c>.
 *    <li><js>"header"</js> - Custom headers that are expected as part of the request.
 *    <li><js>"body"</js> - The payload that's appended to the HTTP request.
 *       Since there can only be one payload, there can only be one body parameter.
 *       The name of the body parameter has no effect on the parameter itself and is used for documentation purposes
 *       only.
 *       Since Form parameters are also in the payload, body and form parameters cannot exist together for the same
 *       operation.
 *    <li><js>"formData"</js> - Used to describe the payload of an HTTP request when either
 *       <c>application/x-www-form-urlencoded</c>, <c>multipart/form-data</c> or both are used as the
 *       content type of the request (in Swagger's definition, the consumes property of an operation).
 *       This is the only parameter type that can be used to send files, thus supporting the file type.
 *       Since form parameters are sent in the payload, they cannot be declared together with a body parameter for the
 *       same operation.
 *       Form parameters have a different format based on the content-type used (for further details, consult
 *       <c>http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4</c>):
 *       <ul>
 *          <li><js>"application/x-www-form-urlencoded"</js> - Similar to the format of Query parameters but as a
 *             payload.
 *             For example, <c>foo=1&amp;bar=swagger</c> - both <c>foo</c> and <c>bar</c> are form
 *             parameters.
 *             This is normally used for simple parameters that are being transferred.
 *          <li><js>"multipart/form-data"</js> - each parameter takes a section in the payload with an internal header.
 *             For example, for the header <c>Content-Disposition: form-data; name="submit-name"</c> the name of
 *             the parameter is <c>submit-name</c>.
 *             This type of form parameters is more commonly used for file transfers.
 *       </ul>
 *    </li>
 * </ul>
 *
 * <h5 class='section'>Example:</h5>
 * <p class='bjava'>
 *    <jc>// Construct using SwaggerBuilder.</jc>
 *    ParameterInfo <jv>info</jv> = <jsm>parameterInfo</jsm>(<js>"query"</js>, <js>"foo"</js>);
 *
 *    <jc>// Serialize using JsonSerializer.</jc>
 *    String <jv>json</jv> = Json.<jsm>from</jsm>(<jv>info</jv>);
 *
 *    <jc>// Or just use toString() which does the same as above.</jc>
 *    <jv>json</jv> = <jv>info</jv>.toString();
 * </p>
 * <p class='bjson'>
 *    <jc>// Output</jc>
 *    {
 *       <js>"in"</js>: <js>"query"</js>,
 *       <js>"name"</js>: <js>"foo"</js>
 *    }
 * </p>
 *
 * <h5 class='section'>See Also:</h5><ul>
 *    <li class='link'><a class="doclink" href="https://swagger.io/specification/v2/#parameter-object">Swagger 2.0 Specification &gt; Parameter Object</a>
 *    <li class='link'><a class="doclink" href="https://swagger.io/docs/specification/2-0/describing-parameters/">Swagger Describing Parameters</a>
 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/JuneauBeanSwagger2">juneau-bean-swagger-v2</a>
 * </ul>
 */
public class ParameterInfo extends SwaggerElement {

   private static final String[] VALID_IN = { "query", "header", "path", "formData", "body" };
   private static final String[] VALID_TYPES = { "string", "number", "integer", "boolean", "array", "file" };
   private static final String[] VALID_COLLECTION_FORMATS = { "csv", "ssv", "tsv", "pipes", "multi" };

   private String name, in, description, type, format, pattern, collectionFormat;
   private Number maximum, minimum, multipleOf;
   private Integer maxLength, minLength, maxItems, minItems;
   private Boolean required, allowEmptyValue, exclusiveMaximum, exclusiveMinimum, uniqueItems;
   private SchemaInfo schema;
   private Items items;
   private Object default_;
   private Set<Object> enum_ = new LinkedHashSet<>();
   private Object example;
   private Map<String,String> examples;

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

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

      this.allowEmptyValue = copyFrom.allowEmptyValue;
      this.collectionFormat = copyFrom.collectionFormat;
      this.default_ = copyFrom.default_;
      this.description = copyFrom.description;
      if (nn(copyFrom.enum_))
         this.enum_.addAll(copyOf(copyFrom.enum_));
      this.example = copyFrom.example;
      this.exclusiveMaximum = copyFrom.exclusiveMaximum;
      this.exclusiveMinimum = copyFrom.exclusiveMinimum;
      this.format = copyFrom.format;
      this.in = copyFrom.in;
      this.items = copyFrom.items == null ? null : copyFrom.items.copy();
      this.maximum = copyFrom.maximum;
      this.maxItems = copyFrom.maxItems;
      this.maxLength = copyFrom.maxLength;
      this.minimum = copyFrom.minimum;
      this.minItems = copyFrom.minItems;
      this.minLength = copyFrom.minLength;
      this.multipleOf = copyFrom.multipleOf;
      this.name = copyFrom.name;
      this.pattern = copyFrom.pattern;
      this.required = copyFrom.required;
      this.schema = copyFrom.schema == null ? null : copyFrom.schema.copy();
      this.type = copyFrom.type;
      this.uniqueItems = copyFrom.uniqueItems;

      this.examples = copyOf(copyFrom.examples);
   }

   /**
    * Bean property appender:  <property>enum</property>.
    *
    * @param value
    *    The values to add to this property.
    *    <br>Ignored if <jk>null</jk>.
    * @return This object.
    */
   public ParameterInfo addEnum(Object...value) {
      if (nn(value))
         for (var v : value)
            if (nn(v))
               enum_.add(v);
      return this;
   }

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

   /**
    * Copies any non-null fields from the specified object to this object.
    *
    * @param p
    *    The object to copy fields from.
    *    <br>Can be <jk>null</jk>.
    * @return This object.
    */
   public ParameterInfo copyFrom(ParameterInfo p) {
      if (nn(p)) {
         if (nn(p.name))
            name = p.name;
         if (nn(p.in))
            in = p.in;
         if (nn(p.description))
            description = p.description;
         if (nn(p.type))
            type = p.type;
         if (nn(p.format))
            format = p.format;
         if (nn(p.pattern))
            pattern = p.pattern;
         if (nn(p.collectionFormat))
            collectionFormat = p.collectionFormat;
         if (nn(p.maximum))
            maximum = p.maximum;
         if (nn(p.minimum))
            minimum = p.minimum;
         if (nn(p.multipleOf))
            multipleOf = p.multipleOf;
         if (nn(p.maxLength))
            maxLength = p.maxLength;
         if (nn(p.minLength))
            minLength = p.minLength;
         if (nn(p.maxItems))
            maxItems = p.maxItems;
         if (nn(p.minItems))
            minItems = p.minItems;
         if (nn(p.required))
            required = p.required;
         if (nn(p.allowEmptyValue))
            allowEmptyValue = p.allowEmptyValue;
         if (nn(p.exclusiveMaximum))
            exclusiveMaximum = p.exclusiveMaximum;
         if (nn(p.exclusiveMinimum))
            exclusiveMinimum = p.exclusiveMinimum;
         if (nn(p.uniqueItems))
            uniqueItems = p.uniqueItems;
         if (nn(p.schema))
            schema = p.schema;
         if (nn(p.items))
            items = p.items;
         if (nn(p.default_))
            default_ = p.default_;
         if (nn(p.enum_))
            enum_ = p.enum_;
         if (nn(p.example))
            example = p.example;
         if (nn(p.examples))
            examples = p.examples;
      }
      return this;
   }

   @Override /* Overridden from SwaggerElement */
   public <T> T get(String property, Class<T> type) {
      assertArgNotNull("property", property);
      return switch (property) {
         case "allowEmptyValue" -> toType(getAllowEmptyValue(), type);
         case "collectionFormat" -> toType(getCollectionFormat(), type);
         case "default" -> toType(getDefault(), type);
         case "description" -> toType(getDescription(), type);
         case "enum" -> toType(getEnum(), type);
         case "example" -> toType(getExample(), type);
         case "examples" -> toType(getExamples(), type);
         case "exclusiveMaximum" -> toType(getExclusiveMaximum(), type);
         case "exclusiveMinimum" -> toType(getExclusiveMinimum(), type);
         case "format" -> toType(getFormat(), type);
         case "in" -> toType(getIn(), type);
         case "items" -> toType(getItems(), type);
         case "maximum" -> toType(getMaximum(), type);
         case "maxItems" -> toType(getMaxItems(), type);
         case "maxLength" -> toType(getMaxLength(), type);
         case "minimum" -> toType(getMinimum(), type);
         case "minItems" -> toType(getMinItems(), type);
         case "minLength" -> toType(getMinLength(), type);
         case "multipleOf" -> toType(getMultipleOf(), type);
         case "name" -> toType(getName(), type);
         case "pattern" -> toType(getPattern(), type);
         case "required" -> toType(getRequired(), type);
         case "schema" -> toType(getSchema(), type);
         case "type" -> toType(getType(), type);
         case "uniqueItems" -> toType(getUniqueItems(), type);
         default -> super.get(property, type);
      };
   }

   /**
    * Bean property getter:  <property>allowEmptyValue</property>.
    *
    * <p>
    * Sets the ability to pass empty-valued parameters.
    *
    * <p>
    * This is valid only for either <c>query</c> or <c>formData</c> parameters and allows you to send a
    * parameter with a name only or an empty value.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Boolean getAllowEmptyValue() { return allowEmptyValue; }

   /**
    * Bean property getter:  <property>collectionFormat</property>.
    *
    * <p>
    * Determines the format of the array if type array is used.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getCollectionFormat() { return collectionFormat; }

   /**
    * Bean property getter:  <property>default</property>.
    *
    * <p>
    * Declares the value of the parameter that the server will use if none is provided, for example a <js>"count"</js>
    * to control the number of results per page might default to 100 if not supplied by the client in the request.
    *
    * (Note: <js>"default"</js> has no meaning for required parameters.)
    * Unlike JSON Schema this value MUST conform to the defined <c>type</c> for this parameter.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Object getDefault() { return default_; }

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

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

   /**
    * Bean property getter:  <property>example</property>.
    *
    * <p>
    * An example of the parameter. This is useful for documentation purposes.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Object getExample() { return example; }

   /**
    * Bean property getter:  <property>examples</property>.
    *
    * <p>
    * Examples of the parameter. This is useful for documentation purposes.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Map<String,String> getExamples() { return examples; }

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

   /**
    * Bean property getter:  <property>format</property>.
    *
    * <p>
    * The extending format for the previously mentioned type.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getFormat() { return format; }

   /**
    * Bean property getter:  <property>in</property>.
    *
    * <p>
    * The location of the parameter.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getIn() { return in; }

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

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

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

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

   /**
    * 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 getter:  <property>name</property>.
    *
    * <p>
    * The name of the parameter.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Parameter names are case sensitive.
    *    <li class='note'>
    *       If <c>in</c> is <js>"path"</js>, the <c>name</c> field MUST correspond to the associated path segment
    *       from the <c>path</c> field in the <a class="doclink" href="https://swagger.io/specification/v2#pathsObject">Paths Object</a>.
    *    <li class='note'>
    *       For all other cases, the name corresponds to the parameter name used based on the <c>in</c> property.
    * </ul>
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getName() { return name; }

   /**
    * 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 getter:  <property>required</property>.
    *
    * <p>
    * Determines whether this parameter is mandatory.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Boolean getRequired() { return required; }

   /**
    * Bean property getter:  <property>schema</property>.
    *
    * <p>
    * The schema defining the type used for the body parameter.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public SchemaInfo getSchema() { return schema; }

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

   /**
    * Bean property getter:  <property>uniqueItems</property>.
    *
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Boolean getUniqueItems() { return uniqueItems; }

   @Override /* Overridden from SwaggerElement */
   public Set<String> keySet() {
      // @formatter:off
      var s = setb(String.class)
         .addIf(nn(allowEmptyValue), "allowEmptyValue")
         .addIf(nn(collectionFormat), "collectionFormat")
         .addIf(nn(default_), "default")
         .addIf(nn(description), "description")
         .addIf(ne(enum_), "enum")
         .addIf(nn(example), "example")
         .addIf(nn(examples), "examples")
         .addIf(nn(exclusiveMaximum), "exclusiveMaximum")
         .addIf(nn(exclusiveMinimum), "exclusiveMinimum")
         .addIf(nn(format), "format")
         .addIf(nn(in), "in")
         .addIf(nn(items), "items")
         .addIf(nn(maxItems), "maxItems")
         .addIf(nn(maxLength), "maxLength")
         .addIf(nn(maximum), "maximum")
         .addIf(nn(minItems), "minItems")
         .addIf(nn(minLength), "minLength")
         .addIf(nn(minimum), "minimum")
         .addIf(nn(multipleOf), "multipleOf")
         .addIf(nn(name), "name")
         .addIf(nn(pattern), "pattern")
         .addIf(nn(required), "required")
         .addIf(nn(schema), "schema")
         .addIf(nn(type), "type")
         .addIf(nn(uniqueItems), "uniqueItems")
         .build();
      // @formatter:on
      return new MultiSet<>(s, super.keySet());
   }

   /**
    * 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 ParameterInfo resolveRefs(Swagger swagger, Deque<String> refStack, int maxDepth) {

      if (nn(schema))
         schema = schema.resolveRefs(swagger, refStack, maxDepth);

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

      return this;
   }

   @SuppressWarnings("unchecked")
   @Override /* Overridden from SwaggerElement */
   public ParameterInfo set(String property, Object value) {
      assertArgNotNull("property", property);
      return switch (property) {
         case "allowEmptyValue" -> setAllowEmptyValue(toBoolean(value));
         case "collectionFormat" -> setCollectionFormat(s(value));
         case "default" -> setDefault(value);
         case "description" -> setDescription(s(value));
         case "enum" -> setEnum(value);
         case "example" -> setExample(value);
         case "examples" -> setExamples(toType(value, Map.class));
         case "exclusiveMaximum" -> setExclusiveMaximum(toBoolean(value));
         case "exclusiveMinimum" -> setExclusiveMinimum(toBoolean(value));
         case "format" -> setFormat(s(value));
         case "in" -> setIn(s(value));
         case "items" -> setItems(toType(value, Items.class));
         case "maximum" -> setMaximum(toNumber(value));
         case "maxItems" -> setMaxItems(toInteger(value));
         case "maxLength" -> setMaxLength(toInteger(value));
         case "minimum" -> setMinimum(toNumber(value));
         case "minItems" -> setMinItems(toInteger(value));
         case "minLength" -> setMinLength(toInteger(value));
         case "multipleOf" -> setMultipleOf(toNumber(value));
         case "name" -> setName(s(value));
         case "pattern" -> setPattern(s(value));
         case "required" -> setRequired(toBoolean(value));
         case "schema" -> setSchema(toType(value, SchemaInfo.class));
         case "type" -> setType(s(value));
         case "uniqueItems" -> setUniqueItems(toBoolean(value));
         default -> {
            super.set(property, value);
            yield this;
         }
      };
   }

   /**
    * Bean property setter:  <property>allowEmptyValue</property>.
    *
    * <p>
    * Sets the ability to pass empty-valued parameters.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    *    <br>Default is <jk>false</jk>.
    * @return This object.
    */
   public ParameterInfo setAllowEmptyValue(Boolean value) {
      allowEmptyValue = value;
      return this;
   }

   /**
    * Bean property setter:  <property>collectionFormat</property>.
    *
    * <p>
    * Determines the format of the array if type array is used.
    *
    * @param value
    *    The new value for this property.
    *    <br>Valid values:
    *    <ul>
    *       <li><js>"csv"</js> (default) - comma separated values <c>foo,bar</c>.
    *       <li><js>"ssv"</js> - space separated values <c>foo bar</c>.
    *       <li><js>"tsv"</js> - tab separated values <c>foo\tbar</c>.
    *       <li><js>"pipes"</js> - pipe separated values <c>foo|bar</c>.
    *       <li><js>"multi"</js> - corresponds to multiple parameter instances instead of multiple values for a single
    *          instance <c>foo=bar&amp;foo=baz</c>.
    *          <br>This is valid only for parameters <c>in</c> <js>"query"</js> or <js>"formData"</js>.
    *    </ul>
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setCollectionFormat(String value) {
      if (isStrict() && ! contains(value, VALID_COLLECTION_FORMATS))
         throw rex("Invalid value passed in to setCollectionFormat(String).  Value=''{0}'', valid values={1}", value, Json5.of(VALID_COLLECTION_FORMATS));
      collectionFormat = value;
      return this;
   }

   /**
    * Bean property setter:  <property>default</property>.
    *
    * <p>
    * Declares the value of the parameter that the server will use if none is provided, for example a <js>"count"</js>
    * to control the number of results per page might default to 100 if not supplied by the client in the request.
    * (Note: <js>"default"</js> has no meaning for required parameters.)
    * Unlike JSON Schema this value MUST conform to the defined <c>type</c> for this parameter.
    *
    * @param value The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setDefault(Object value) {
      default_ = value;
      return this;
   }

   /**
    * Bean property setter:  <property>description</property>.
    *
    * <p>
    * A brief description of the parameter.
    *
    * @param value
    *    The new value for this property.
    *    <br><a class="doclink" href="https://help.github.com/articles/github-flavored-markdown">GFM syntax</a> can be used for rich text representation.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setDescription(String value) {
      description = value;
      return this;
   }

   /**
    * Bean property setter:  <property>enum</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setEnum(Collection<Object> value) {
      enum_.clear();
      if (nn(value))
         enum_.addAll(value);
      return this;
   }

   /**
    * Bean property fluent setter:  <property>enum</property>.
    *
    * @param value
    *    The new value for this property.
    *    <br>Strings can be JSON arrays.
    * @return This object.
    */
   public ParameterInfo setEnum(Object...value) {
      setEnum(setb(Object.class).sparse().addAny(value).build());
      return this;
   }

   /**
    * Bean property setter:  <property>example</property>.
    *
    * <p>
    * An example of the parameter. This is useful for documentation purposes.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setExample(Object value) {
      example = value;
      return this;
   }

   /**
    * Bean property setter:  <property>examples</property>.
    *
    * <p>
    * Examples of the parameter. This is useful for documentation purposes.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setExamples(Map<String,String> value) {
      examples = value;
      return this;
   }

   /**
    * 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.
    */
   public ParameterInfo setExclusiveMaximum(Boolean value) {
      exclusiveMaximum = value;
      return this;
   }

   /**
    * 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.
    */
   public ParameterInfo setExclusiveMinimum(Boolean value) {
      exclusiveMinimum = value;
      return this;
   }

   /**
    * Bean property setter:  <property>format</property>.
    *
    * <p>
    * The extending format for the previously mentioned type.
    *
    * @param value The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setFormat(String value) {
      format = value;
      return this;
   }

   /**
    * Bean property setter:  <property>in</property>.
    *
    * <p>
    * The location of the parameter.
    *
    * @param value
    *    The new value for this property.
    *    <br>Valid values:
    *    <ul>
    *       <li><js>"query"</js>
    *       <li><js>"header"</js>
    *       <li><js>"path"</js>
    *       <li><js>"formData"</js>
    *       <li><js>"body"</js>
    *    </ul>
    *    <br>Property value is required.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setIn(String value) {
      if (isStrict() && ! contains(value, VALID_IN))
         throw rex("Invalid value passed in to setIn(String).  Value=''{0}'', valid values={1}", value, Json5.of(VALID_IN));
      in = value;
      if ("path".equals(value))
         required = true;
      return this;
   }

   /**
    * Bean property setter:  <property>items</property>.
    *
    * <p>
    * Describes the type of items in the array.
    *
    * @param value
    *    The new value for this property.
    *    <br>Property value is required if <c>type</c> is <js>"array"</js>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setItems(Items value) {
      items = value;
      return this;
   }

   /**
    * 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.
    */
   public ParameterInfo setMaximum(Number value) {
      maximum = value;
      return this;
   }

   /**
    * 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.
    */
   public ParameterInfo setMaxItems(Integer value) {
      maxItems = value;
      return this;
   }

   /**
    * 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.
    */
   public ParameterInfo setMaxLength(Integer value) {
      maxLength = value;
      return this;
   }

   /**
    * 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.
    */
   public ParameterInfo setMinimum(Number value) {
      minimum = value;
      return this;
   }

   /**
    * 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.
    */
   public ParameterInfo setMinItems(Integer value) {
      minItems = value;
      return this;
   }

   /**
    * 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.
    */
   public ParameterInfo setMinLength(Integer value) {
      minLength = value;
      return this;
   }

   /**
    * 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.
    */
   public ParameterInfo setMultipleOf(Number value) {
      multipleOf = value;
      return this;
   }

   /**
    * Bean property setter:  <property>name</property>.
    *
    * <p>
    * The name of the parameter.
    *
    * @param value
    *    The new value for this property.
    *    <br>Property value is required.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setName(String value) {
      if (! "body".equals(in))
         name = value;
      return this;
   }

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

   /**
    * Bean property setter:  <property>required</property>.
    *
    * <p>
    * Determines whether this parameter is mandatory.
    *
    * @param value
    *    The new value for this property.
    *    <br>If the parameter is <c>in</c> <js>"path"</js>, this property is required and its value MUST be <jk>true</jk>.
    *    <br>Otherwise, the property MAY be included and its default value is <jk>false</jk>.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setRequired(Boolean value) {
      required = value;
      return this;
   }

   /**
    * Bean property setter:  <property>schema</property>.
    *
    * <p>
    * The schema defining the type used for the body parameter.
    *
    * @param value
    *    The new value for this property.
    *    <br>Property value is required.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setSchema(SchemaInfo value) {
      schema = value;
      return this;
   }

   /**
    * Bean property setter:  <property>type</property>.
    *
    * <p>
    * The type of the parameter.
    *
    * @param value
    *    The new value for this property.
    *    <br>Valid values:
    *    <ul>
    *       <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>
    *    <br>If type is <js>"file"</js>, the <c>consumes</c> MUST be either <js>"multipart/form-data"</js>, <js>"application/x-www-form-urlencoded"</js>
    *       or both and the parameter MUST be <c>in</c> <js>"formData"</js>.
    *    <br>Property value is required.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object.
    */
   public ParameterInfo setType(String value) {
      if (isStrict() && ! contains(value, VALID_TYPES))
         throw rex("Invalid value passed in to setType(String).  Value=''{0}'', valid values={1}", value, Json5.of(VALID_TYPES));
      type = value;
      return this;
   }

   /**
    * Bean property setter:  <property>uniqueItems</property>.
    *
    * @param value The new value for this property.
    * @return This object.
    */
   public ParameterInfo setUniqueItems(Boolean value) {
      uniqueItems = value;
      return this;
   }

   @Override /* Overridden from SwaggerElement */
   public ParameterInfo strict() {
      super.strict();
      return this;
   }

   /**
    * Sets strict mode on this bean.
    *
    * @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> (interpreted as <jk>false</jk>).
    * @return This object.
    */
   @Override
   public ParameterInfo strict(Object value) {
      super.strict(value);
      return this;
   }
}