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package org.apache.juneau.transform;

import static org.apache.juneau.internal.ClassUtils.*;

import java.beans.*;
import java.util.*;

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

/**
 * Builder class for {@link BeanFilter} objects.
 *
 * <p>
 * This class is the programmatic equivalent to the {@link Bean @Bean} annotation.
 *
 * <p>
 * The general approach to defining bean filters is to create subclasses from this class and call methods to
 * set various attributes
 * <p class='bcode w800'>
 *    <jk>public class</jk> MyFilter <jk>extends</jk> BeanFilterBuilder&lt;MyBean&gt; {
 *
 *       <jc>// Must provide a no-arg constructor!</jc>
 *       <jk>public</jk> MyFilter() {
 *
 *          <jc>// Call one or more configuration methods.</jc>
 *          includeProperties(<js>"foo,bar,baz"</js>);
 *          sortProperties();
 *          propertyNamer(PropertyNamerULC.<jk>class</jk>);
 *       }
 *    }
 *
 *    <jc>// Register it with a serializer or parser.</jc>
 *    WriterSerializer s = JsonSerializer
 *       .<jsm>create</jsm>()
 *       .beanFilters(MyFilter.<jk>class</jk>)
 *       .build();
 * </p>
 *
 * <ul class='seealso'>
 *    <li class='link'>{@doc juneau-marshall.Transforms.BeanFilters}
 * </ul>
 *
 * @param <T> The bean type that this filter applies to.
 */
public class BeanFilterBuilder<T> {

   Class<?> beanClass;
   String typeName;
   String[] includeProperties, excludeProperties;
   Class<?> interfaceClass, stopClass;
   boolean sortProperties, fluentSetters;
   Object propertyNamer;
   List<Class<?>> beanDictionary;
   Object propertyFilter;

   /**
    * Constructor.
    *
    * <p>
    * Bean class is determined through reflection of the parameter type.
    */
   protected BeanFilterBuilder() {
      beanClass = getClassInfo(this.getClass()).getParameterType(0, BeanFilterBuilder.class);
   }

   /**
    * Constructor.
    *
    * @param beanClass The bean class that this filter applies to.
    */
   protected BeanFilterBuilder(Class<?> beanClass) {
      this.beanClass = beanClass;
   }

   /**
    * Configuration property:  Bean dictionary type name.
    *
    * <p>
    * Specifies the dictionary type name for this bean.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> MyFilter <jk>extends</jk> BeanFilterBuilder&lt;MyBean&gt; {
    *       <jk>public</jk> MyFilter() {
    *          typeName(<js>"mybean"</js>);
    *       }
    *    }
    *
    *    <jc>// Register it with a serializer or parser.</jc>
    *    WriterSerializer s = JsonSerializer
    *       .<jsm>create</jsm>()
    *       .beanFilters(MyFilter.<jk>class</jk>)
    *       .build();
    *
    *    <jc>// Produces:  "{_type:'mybean', ...}"</jc>
    *    String json = s.serialize(<jk>new</jk> MyBean());
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#typeName()}
    * </ul>
    *
    * @param value The new value for this setting.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> typeName(String value) {
      this.typeName = value;
      return this;
   }

   /**
    * Configuration property:  Bean property includes.
    *
    * <p>
    * Specifies the set and order of names of properties associated with the bean class.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> MyFilter <jk>extends</jk> BeanFilterBuilder&lt;MyBean&gt; {
    *       <jk>public</jk> MyFilter() {
    *          includeProperties(<js>"foo,bar,baz"</js>);
    *       }
    *    }
    *
    *    <jc>// Register it with a serializer.</jc>
    *    WriterSerializer s = JsonSerializer
    *       .<jsm>create</jsm>()
    *       .beanFilters(MyFilter.<jk>class</jk>)
    *       .build();
    *
    *    <jc>// Only serializes the properties 'foo', 'bar', and 'baz'.</jc>
    *    String json = s.serialize(<jk>new</jk> MyBean());
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#properties()}
    *    <li class='jf'>{@link BeanContext#BEAN_includeProperties}
    * </ul>
    *
    * @param value
    *    The new value for this setting.
    *    <br>Values can contain comma-delimited list of property names.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> properties(String...value) {
      this.includeProperties = value;
      return this;
   }

   /**
    * Configuration property:  Bean property excludes.
    *
    * <p>
    * Specifies properties to exclude from the bean class.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> MyFilter <jk>extends</jk> BeanFilterBuilder&lt;MyBean&gt; {
    *       <jk>public</jk> MyFilter() {
    *          excludeProperties(<js>"foo,bar"</js>);
    *       }
    *    }
    *
    *    <jc>// Register it with a serializer.</jc>
    *    WriterSerializer s = JsonSerializer
    *       .<jsm>create</jsm>()
    *       .beanFilters(MyFilter.<jk>class</jk>)
    *       .build();
    *
    *    <jc>// Serializes all properties except for 'foo' and 'bar'.</jc>
    *    String json = s.serialize(<jk>new</jk> MyBean());
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#excludeProperties()}
    *    <li class='jf'>{@link BeanContext#BEAN_excludeProperties}
    * </ul>
    *
    * @param value
    *    The new value for this setting.
    *    <br>Values can contain comma-delimited list of property names.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> excludeProperties(String...value) {
      this.excludeProperties = value;
      return this;
   }

   /**
    * Configuration property:  Bean interface class.
    *
    * Identifies a class to be used as the interface class for this and all subclasses.
    *
    * <p>
    * When specified, only the list of properties defined on the interface class will be used during serialization.
    * <br>Additional properties on subclasses will be ignored.
    *
    * <p class='bcode w800'>
    *    <jc>// Parent class</jc>
    *    <jk>public abstract class</jk> A {
    *       <jk>public</jk> String <jf>f0</jf> = <js>"f0"</js>;
    *    }
    *
    *    <jc>// Sub class</jc>
    *    <jk>public class</jk> A1 <jk>extends</jk> A {
    *       <jk>public</jk> String <jf>f1</jf> = <js>"f1"</js>;
    *    }
    *
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> AFilter <jk>extends</jk> BeanFilterBuilder&lt;A&gt; {
    *       <jk>public</jk> AFilter() {
    *          interfaceClass(A.<jk>class</jk>);
    *       }
    *    }
    *
    *    <jc>// Register it with a serializer.</jc>
    *    WriterSerializer s = JsonSerializer
    *       .<jsm>create</jsm>()
    *       .beanFilters(AFilter.<jk>class</jk>)
    *       .build();
    *
    *    <jc>// Use it.</jc>
    *    A1 a1 = <jk>new</jk> A1();
    *    String r = s.serialize(a1);
    *    <jsm>assertEquals</jsm>(<js>"{f0:'f0'}"</js>, r);  <jc>// Note f1 is not serialized</jc>
    * </p>
    *
    * <p>
    * Note that this filter can be used on the parent class so that it filters to all child classes, or can be set
    * individually on the child classes.
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#interfaceClass()}
    *    <li class='jf'>{@link BeanContext#BEAN_beanFilters}
    * </ul>
    *
    * @param value The new value for this setting.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> interfaceClass(Class<?> value) {
      this.interfaceClass = value;
      return this;
   }

   /**
    * Configuration property:  Bean stop class.
    *
    * <p>
    * Identifies a stop class for this class and all subclasses.
    *
    * <p>
    * Identical in purpose to the stop class specified by {@link Introspector#getBeanInfo(Class, Class)}.
    * <br>Any properties in the stop class or in its base classes will be ignored during analysis.
    *
    * <p>
    * For example, in the following class hierarchy, instances of <c>C3</c> will include property <c>p3</c>,
    * but not <c>p1</c> or <c>p2</c>.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jk>public class</jk> C1 {
    *       <jk>public int</jk> getP1();
    *    }
    *
    *    <jk>public class</jk> C2 <jk>extends</jk> C1 {
    *       <jk>public int</jk> getP2();
    *    }
    *
    *    <jk>public class</jk> C3 <jk>extends</jk> C2 {
    *       <jk>public int</jk> getP3();
    *    }
    *
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> C3Filter <jk>extends</jk> BeanFilterBuilder&lt;C3&gt; {
    *       <jk>public</jk> C3Filter() {
    *          stopClass(C2.<jk>class</jk>);
    *       }
    *    }
    *
    *    <jc>// Register it with a serializer.</jc>
    *    WriterSerializer s = JsonSerializer
    *       .<jsm>create</jsm>()
    *       .beanFilters(C3Filter.<jk>class</jk>)
    *       .build();
    *
    *    <jc>// Serializes property 'p3', but NOT 'p1' or 'p2'.</jc>
    *    String json = s.serialize(<jk>new</jk> C3());
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#stopClass()}
    * </ul>
    *
    * @param value The new value for this setting.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> stopClass(Class<?> value) {
      this.stopClass = value;
      return this;
   }

   /**
    * Configuration property:  Sort bean properties.
    *
    * <p>
    * When <jk>true</jk>, all bean properties will be serialized and access in alphabetical order.
    * <br>Otherwise, the natural order of the bean properties is used which is dependent on the JVM vendor.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> MyFilter <jk>extends</jk> BeanFilterBuilder&lt;MyBean&gt; {
    *       <jk>public</jk> MyFilter() {
    *          sortProperties();
    *       }
    *    }
    *
    *    <jc>// Register it with a serializer.</jc>
    *    WriterSerializer s = JsonSerializer
    *       .<jsm>create</jsm>()
    *       .beanFilters(MyFilter.<jk>class</jk>)
    *       .build();
    *
    *    <jc>// Properties will be sorted alphabetically.</jc>
    *    String json = s.serialize(<jk>new</jk> MyBean());
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#sort()}
    *    <li class='jf'>{@link BeanContext#BEAN_sortProperties}
    * </ul>
    *
    * @param value
    *    The new value for this property.
    *    <br>The default is <jk>false</jk>.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> sortProperties(boolean value) {
      this.sortProperties = value;
      return this;
   }

   /**
    * Configuration property:  Sort bean properties.
    *
    * <p>
    * Shortcut for calling <code>sortProperties(<jk>true</jk>)</code>.
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#sort()}
    *    <li class='jf'>{@link BeanContext#BEAN_sortProperties}
    * </ul>
    *
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> sortProperties() {
      this.sortProperties = true;
      return this;
   }

   /**
    * Configuration property:  Find fluent setters.
    *
    * <p>
    * When enabled, fluent setters are detected on beans.
    *
    * <p>
    * Fluent setters must have the following attributes:
    * <ul>
    *    <li>Public.
    *    <li>Not static.
    *    <li>Take in one parameter.
    *    <li>Return the bean itself.
    * </ul>
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> MyFilter <jk>extends</jk> BeanFilterBuilder&lt;MyBean&gt; {
    *       <jk>public</jk> MyFilter() {
    *          fluentSetters();
    *       }
    *    }
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#fluentSetters()}
    *    <li class='jf'>{@link BeanContext#BEAN_fluentSetters}
    * </ul>
    *
    * @param value
    *    The new value for this property.
    *    <br>The default is <jk>false</jk>.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> fluentSetters(boolean value) {
      this.fluentSetters = value;
      return this;
   }

   /**
    * Configuration property:  Find fluent setters.
    *
    * <p>
    * Shortcut for calling <code>fluentSetters(<jk>true</jk>)</code>.
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#fluentSetters()}
    *    <li class='jf'>{@link BeanContext#BEAN_fluentSetters}
    * </ul>
    *
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> fluentSetters() {
      this.fluentSetters = true;
      return this;
   }

   /**
    * Configuration property:  Bean property namer
    *
    * <p>
    * The class to use for calculating bean property names.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> MyFilter <jk>extends</jk> BeanFilterBuilder&lt;MyBean&gt; {
    *       <jk>public</jk> MyFilter() {
    *          <jc>// Use Dashed-Lower-Case property names.</jc>
    *          <jc>// (e.g. "foo-bar-url" instead of "fooBarURL")</jc>
    *          propertyNamer(PropertyNamerDLC.<jk>class</jk>);
    *       }
    *    }
    *
    *    <jc>// Register it with a serializer or parser.</jc>
    *    WriterSerializer s = JsonSerializer
    *       .<jsm>create</jsm>()
    *       .beanFilters(MyFilter.<jk>class</jk>)
    *       .build();
    *
    *    <jc>// Properties names will be Dashed-Lower-Case.</jc>
    *    String json = s.serialize(<jk>new</jk> MyBean());
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#propertyNamer()}
    *    <li class='jf'>{@link BeanContext#BEAN_propertyNamer}
    *    <li class='jc'>{@link PropertyNamer}
    * </ul>
    *
    * @param value
    *    The new value for this setting.
    *    <br>The default is {@link PropertyNamerDefault}.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> propertyNamer(Class<? extends PropertyNamer> value) {
      this.propertyNamer = value;
      return this;
   }

   /**
    * Configuration property:  Bean dictionary.
    *
    * <p>
    * Adds to the list of classes that make up the bean dictionary for this bean.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> MyFilter <jk>extends</jk> BeanFilterBuilder&lt;MyBean&gt; {
    *       <jk>public</jk> MyFilter() {
    *          <jc>// Our bean contains generic collections of Foo and Bar objects.</jc>
    *          beanDictionary(Foo.<jk>class</jk>, Bar.<jk>class</jk>);
    *       }
    *    }
    *
    *    <jc>// Register it with a parser.</jc>
    *    ReaderParser p = JsonParser
    *       .<jsm>create</jsm>()
    *       .beanFilters(MyFilter.<jk>class</jk>)
    *       .build();
    *
    *    <jc>// Instantiate our bean.</jc>
    *    MyBean myBean = p.parse(json);
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#beanDictionary()}
    *    <li class='jf'>{@link BeanContext#BEAN_beanDictionary}
    * </ul>
    *
    * @param values
    *    The values to add to this property.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> beanDictionary(Class<?>...values) {
      if (beanDictionary == null)
         beanDictionary = new ArrayList<>(Arrays.asList(values));
      else for (Class<?> cc : values)
         beanDictionary.add(cc);
      return this;
   }

   /**
    * Configuration property:  Property filter.
    *
    * <p>
    * The property filter to use for intercepting and altering getter and setter calls.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Define our filter.</jc>
    *    <jk>public class</jk> MyFilter <jk>extends</jk> BeanFilterBuilder&lt;MyBean&gt; {
    *       <jk>public</jk> MyFilter() {
    *          <jc>// Our bean contains generic collections of Foo and Bar objects.</jc>
    *          propertyFilter(AddressPropertyFilter.<jk>class</jk>);
    *       }
    *    }
    *
    *    <jc>// Register it with a serializer or parser.</jc>
    *    WriterSerializer s = JsonSerializer
    *       .<jsm>create</jsm>()
    *       .beanFilters(MyFilter.<jk>class</jk>)
    *       .build();
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='ja'>{@link Bean#propertyFilter()}
    *    <li class='jc'>{@link PropertyFilter}
    * </ul>
    *
    * @param value
    *    The new value for this setting.
    *    <br>The default value is {@link PropertyFilter}.
    * @return This object (for method chaining).
    */
   public BeanFilterBuilder<T> propertyFilter(Class<? extends PropertyFilter> value) {
      this.propertyFilter = value;
      return this;
   }

   /**
    * Creates a {@link BeanFilter} with settings in this builder class.
    *
    * @return A new {@link BeanFilter} instance.
    */
   public BeanFilter build() {
      return new BeanFilter(this);
   }
}