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

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;

import java.beans.*;
import java.lang.annotation.*;
import java.util.*;

import org.apache.juneau.*;
import org.apache.juneau.transform.*;

/**
 * Used to tailor how beans get interpreted by the framework.
 *
 * <p>
 * This annotation can be applied to classes and interfaces.
 *
 * <ul class='seealso'>
 *    <li class='link'>{@doc BeanAnnotation}
 * </ul>
 */
@Documented
@Target(TYPE)
@Retention(RUNTIME)
@Inherited
public @interface Bean {

   /**
    * Bean dictionary.
    *
    * <p>
    * The list of classes that make up the bean dictionary for all properties in this class and all subclasses.
    *
    * <ul class='seealso'>
    *    <li class='jf'>{@link BeanContext#BEAN_beanDictionary}
    * </ul>
    *
    * <div class='warn'>
    *    <b>Deprecated</b> - {@link #dictionary()}.
    * </div>
    */
   @Deprecated
   Class<?>[] beanDictionary() default {};

   /**
    * Bean property includes.
    *
    * <p>
    * The set and order of names of properties associated with a bean class.
    *
    * <p>
    * The order specified is the same order that the entries will be returned by the {@link BeanMap#entrySet()} and
    * related methods.
    *
    * <p>
    * This value is entirely optional if you simply want to expose all the getters and public fields on
    * a class as bean properties.
    * <br>However, it's useful if you want certain getters to be ignored or you want the properties to be
    * serialized in a particular order.
    * <br>Note that on IBM JREs, the property order is the same as the order in the source code,
    * whereas on Oracle JREs, the order is entirely random.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Address class with only street/city/state properties (in that order).</jc>
    *    <ja>@Bean</ja>(bpi=<js>"street,city,state"</js>)
    *    <jk>public class</jk> Address {...}
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='jm'>{@link BeanContextBuilder#bpi(Class, String)}
    *    <li class='jm'>{@link BeanContextBuilder#bpi(String, String)}
    *    <li class='jm'>{@link BeanContextBuilder#bpi(Map)}
    * </ul>
    */
   String bpi() default "";

   /**
    * Bean property excludes.
    *
    * <p>
    * Specifies a list of properties that should be excluded from {@link BeanMap#entrySet()}.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Exclude the 'city' and 'state' properties from the Address class.</jc>
    *    <ja>@Bean</ja>(bpx=<js>"city,state"</js>})
    *    <jk>public class</jk> Address {...}
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='jm'>{@link BeanContextBuilder#bpx(Class, String)}
    *    <li class='jm'>{@link BeanContextBuilder#bpx(String, String)}
    *    <li class='jm'>{@link BeanContextBuilder#bpx(Map)}
    * </ul>
    */
   String bpx() default "";

   /**
    * Read-only bean properties.
    *
    * <p>
    * Specifies one or more properties on a bean that are read-only despite having valid getters.
    * Serializers will serialize such properties as usual, but parsers will silently ignore them.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Exclude the 'city' and 'state' properties from being parsed, but not serialized.</jc>
    *    <ja>@Bean</ja>(bpro=<js>"city,state"</js>})
    *    <jk>public class</jk> Address {...}
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='jm'>{@link BeanContextBuilder#bpro(Class, String)}
    *    <li class='jm'>{@link BeanContextBuilder#bpro(String, String)}
    *    <li class='jm'>{@link BeanContextBuilder#bpro(Map)}
    * </ul>
    */
   String bpro() default "";

   /**
    * Write-only bean properties.
    *
    * <p>
    * Specifies one or more properties on a bean that are write-only despite having valid setters.
    * Parsers will parse such properties as usual, but serializers will silently ignore them.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Exclude the 'city' and 'state' properties from being serialized, but not parsed.</jc>
    *    <ja>@Bean</ja>(bpro=<js>"city,state"</js>})
    *    <jk>public class</jk> Address {...}
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='jm'>{@link BeanContextBuilder#bpwo(Class, String)}
    *    <li class='jm'>{@link BeanContextBuilder#bpwo(String, String)}
    *    <li class='jm'>{@link BeanContextBuilder#bpwo(Map)}
    * </ul>
    */
   String bpwo() default "";

   /**
    * Bean dictionary.
    *
    * <p>
    * The list of classes that make up the bean dictionary for all properties in this class and all subclasses.
    *
    * <ul class='seealso'>
    *    <li class='jf'>{@link BeanContext#BEAN_beanDictionary}
    * </ul>
    */
   Class<?>[] dictionary() default {};

   /**
    * Specifies a list of properties that should be excluded from {@link BeanMap#entrySet()}.
    *
    * <div class='warn'>
    *    <b>Deprecated</b> - {@link #bpx()}.
    * </div>
    */
   @Deprecated String excludeProperties() default "";

   /**
    * Find fluent setters.
    *
    * <p>
    * When <jk>true</jk>, fluent setters will be detected on beans.
    *
    * <p>
    * Fluent setters
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <ja>@Bean</ja>(fluentSetters=<jk>true</jk>)
    *    <jk>public class</jk> MyBean {
    *       <jk>public int</jk> getId() {...}
    *       <jk>public</jk> MyBean id(<jk>int</jk> id) {...}
    *    }
    * </p>
    *
    * <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>
    *
    * <ul class='seealso'>
    *    <li class='jf'>{@link BeanContext#BEAN_fluentSetters}
    * </ul>
    */
   boolean fluentSetters() default false;

   /**
    * 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.
    * Additional properties on subclasses will be ignored.
    *
    * <p class='bcode w800'>
    *    <jc>// Parent class</jc>
    *    <ja>@Bean</ja>(interfaceClass=A.<jk>class</jk>)
    *    <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>// Produces "{f0:'f0'}"</jc>
    *    String json = SimpleJsonSerializer.<jsf>DEFAULT</jsf>.serialize(<jk>new</jk> A1());
    * </p>
    *
    * <p>
    * Note that this annotation can be used on the parent class so that it filters to all child classes,
    * or can be set individually on the child classes.
    */
   Class<?> interfaceClass() default Object.class;

   /**
    * Bean property interceptor.
    *
    * <p>
    * Bean interceptors can be used to intercept calls to getters and setters and alter their values in transit.
    *
    * <ul class='seealso'>
    *    <li class='jc'>{@link BeanInterceptor}
    * </ul>
    */
   Class<? extends BeanInterceptor<?>> interceptor() default BeanInterceptor.Default.class;

   /**
    * Dynamically apply this annotation to the specified classes.
    *
    * <p>
    * Used in conjunction with the {@link BeanConfig#applyBean()}.
    * It is ignored when the annotation is applied directly to classes.
    *
    * <p>
    * The following example shows the equivalent methods for applying the {@link Bean @Bean} annotation to REST methods:
    * <p class='bpcode w800'>
    *    <jc>// Class with explicit annotation.</jc>
    *    <ja>@Bean</ja>(bpi=<js>"street,city,state"</js>)
    *    <jk>public class</jk> A {...}
    *
    *    <jc>// Class with annotation applied via @BeanConfig</jc>
    *    <jk>public class</jk> B {...}
    *
    *    <jc>// Java REST method with @BeanConfig annotation.</jc>
    *    <ja>@RestMethod</ja>(...)
    *    <ja>@BeanConfig</ja>(
    *       applyBean={
    *          <ja>@Bean</ja>(on=<js>"B"</js>, bpi=<js>"street,city,state"</js>)
    *       }
    *    )
    *    <jk>public void</jk> doFoo() {...}
    * </p>
    *
    * <h5 class='section'>Valid patterns:</h5>
    * <ul class='spaced-list'>
    *  <li>Classes:
    *       <ul>
    *          <li>Fully qualified:
    *             <ul>
    *                <li><js>"com.foo.MyClass"</js>
    *             </ul>
    *          <li>Fully qualified inner class:
    *             <ul>
    *                <li><js>"com.foo.MyClass$Inner1$Inner2"</js>
    *             </ul>
    *          <li>Simple:
    *             <ul>
    *                <li><js>"MyClass"</js>
    *             </ul>
    *          <li>Simple inner:
    *             <ul>
    *                <li><js>"MyClass$Inner1$Inner2"</js>
    *                <li><js>"Inner1$Inner2"</js>
    *                <li><js>"Inner2"</js>
    *             </ul>
    *       </ul>
    *    <li>A comma-delimited list of anything on this list.
    * </ul>
    *
    * <ul class='seealso'>
    *    <li class='link'>{@doc DynamicallyAppliedAnnotations}
    * </ul>
    */
   String on() default "";

   /**
    * The set and order of names of properties associated with a bean class.
    *
    * <div class='warn'>
    *    <b>Deprecated</b> - {@link #bpi()}.
    * </div>
    */
   @Deprecated String properties() default "";

   /**
    * Associates a {@link PropertyNamer} with this bean to tailor the names of the bean properties.
    *
    * <p>
    * Property namers are used to transform bean property names from standard form to some other form.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Define a class with dashed-lowercase property names.</jc>
    *    <ja>@Bean</ja>(propertyNamer=PropertyNamerDashedLC.<jk>class</jk>)
    *    <jk>public class</jk> MyBean {...}
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='jf'>{@link BeanContext#BEAN_propertyNamer}
    * </ul>
    */
   Class<? extends PropertyNamer> propertyNamer() default PropertyNamerDefault.class;

   /**
    * Sort bean properties in alphabetical order.
    *
    * <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>// Sort bean properties alphabetically during serialization.</jc>
    *    <ja>@Bean</ja>(sort=<jk>true</jk>)
    *    <jk>public class</jk> MyBean {...}
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='jf'>{@link BeanContext#BEAN_sortProperties}
    * </ul>
    */
   boolean sort() default false;

   /**
    * Identifies a stop class for the annotated class.
    *
    * <p>
    * Identical in purpose to the stop class specified by {@link Introspector#getBeanInfo(Class, Class)}.
    * 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>.
    * <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();
    *    }
    *
    *    <ja>@Bean</ja>(stopClass=C2.<jk>class</jk>)
    *    <jk>public class</jk> C3 <jk>extends</jk> C2 {
    *       <jk>public int</jk> getP3();
    *    }
    * </p>
    */
   Class<?> stopClass() default Object.class;

   /**
    * An identifying name for this class.
    *
    * <p>
    * The name is used to identify the class type during parsing when it cannot be inferred through reflection.
    * <br>For example, if a bean property is of type <c>Object</c>, then the serializer will add the name to the
    * output so that the class can be determined during parsing.
    *
    * <p>
    * It is also used to specify element names in XML.
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Use _type='mybean' to identify this bean.</jc>
    *    <ja>@Bean</ja>(typeName=<js>"mybean"</js>)
    *    <jk>public class</jk> MyBean {...}
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='jf'>{@link BeanContext#BEAN_beanDictionary}
    * </ul>
    */
   String typeName() default "";

   /**
    * The property name to use for representing the type name.
    *
    * <p>
    * This can be used to override the name used for the <js>"_type"</js> property used by the {@link #typeName()} setting.
    *
    * <p>
    * The default value if not specified is <js>"_type"</js> .
    *
    * <h5 class='section'>Example:</h5>
    * <p class='bcode w800'>
    *    <jc>// Use 'type' instead of '_type' for bean names.</jc>
    *    <ja>@Bean</ja>(typePropertyName=<js>"type"</js>)
    *    <jk>public class</jk> MyBean {...}
    * </p>
    *
    * <ul class='seealso'>
    *    <li class='jf'>{@link BeanContext#BEAN_typePropertyName}
    * </ul>
    */
   String typePropertyName() default "";
}