/*
 * 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.annotation;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;
import static org.apache.juneau.internal.ArrayUtils.*;

import java.lang.annotation.*;

import org.apache.juneau.*;
import org.apache.juneau.reflect.*;
import org.apache.juneau.svl.*;
import org.apache.juneau.swap.*;

/**
 * Utility classes and methods for the {@link Bean @Bean} annotation.
 *
 * <h5 class='section'>See Also:</h5><ul>
 * </ul>
 */
public class BeanAnnotation {

   //-----------------------------------------------------------------------------------------------------------------
   // Static
   //-----------------------------------------------------------------------------------------------------------------

   /** Default value */
   public static final Bean DEFAULT = create().build();

   /**
    * Instantiates a new builder for this class.
    *
    * @return A new builder object.
    */
   public static Builder create() {
      return new Builder();
   }

   /**
    * Instantiates a new builder for this class.
    *
    * @param on The targets this annotation applies to.
    * @return A new builder object.
    */
   public static Builder create(Class<?>...on) {
      return create().on(on);
   }

   /**
    * Instantiates a new builder for this class.
    *
    * @param on The targets this annotation applies to.
    * @return A new builder object.
    */
   public static Builder create(String...on) {
      return create().on(on);
   }

   /**
    * Creates a copy of the specified annotation.
    *
    * @param a The annotation to copy.
    * @param r The var resolver for resolving any variables.
    * @return A copy of the specified annotation.
    */
   public static Bean copy(Bean a, VarResolverSession r) {
      return
         create()
         .dictionary(a.dictionary())
         .example(r.resolve(a.example()))
         .excludeProperties(r.resolve(a.excludeProperties()))
         .findFluentSetters(a.findFluentSetters())
         .implClass(a.implClass())
         .interceptor(a.interceptor())
         .interfaceClass(a.interfaceClass())
         .on(r.resolve(a.on()))
         .onClass(a.onClass())
         .p(r.resolve(a.p()))
         .properties(r.resolve(a.properties()))
         .propertyNamer(a.propertyNamer())
         .readOnlyProperties(r.resolve(a.readOnlyProperties()))
         .ro(r.resolve(a.ro()))
         .sort(a.sort())
         .stopClass(a.stopClass())
         .typeName(r.resolve(a.typeName()))
         .typePropertyName(r.resolve(a.typePropertyName()))
         .wo(r.resolve(a.wo()))
         .writeOnlyProperties(r.resolve(a.writeOnlyProperties()))
         .xp(r.resolve(a.xp()))
         .build();
   }

   //-----------------------------------------------------------------------------------------------------------------
   // Builder
   //-----------------------------------------------------------------------------------------------------------------

   /**
    * Builder class.
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanContext.Builder#annotations(Annotation...)}
    * </ul>
    */
   public static class Builder extends TargetedAnnotationTBuilder<Builder> {

      Class<?>[] dictionary = new Class[0];
      Class<?> implClass=void.class, interfaceClass=void.class, stopClass=void.class;
      Class<? extends BeanInterceptor<?>> interceptor=BeanInterceptor.Void.class;
      Class<? extends PropertyNamer> propertyNamer=BasicPropertyNamer.class;
      String example="", excludeProperties="", p="", properties="", readOnlyProperties="", ro="", typeName="", typePropertyName="", wo="", writeOnlyProperties="", xp="";
      boolean findFluentSetters, sort;

      /**
       * Constructor.
       */
      protected Builder() {
         super(Bean.class);
      }

      /**
       * Instantiates a new {@link Bean @Bean} object initialized with this builder.
       *
       * @return A new {@link Bean @Bean} object.
       */
      public Bean build() {
         return new Impl(this);
      }

      /**
       * Sets the {@link Bean#dictionary()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder dictionary(Class<?>...value) {
         this.dictionary = value;
         return this;
      }

      /**
       * Sets the {@link Bean#example()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder example(String value) {
         this.example = value;
         return this;
      }

      /**
       * Sets the {@link Bean#excludeProperties()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder excludeProperties(String value) {
         this.excludeProperties = value;
         return this;
      }

      /**
       * Sets the {@link Bean#findFluentSetters()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder findFluentSetters(boolean value) {
         this.findFluentSetters = value;
         return this;
      }

      /**
       * Sets the {@link Bean#implClass()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder implClass(Class<?> value) {
         this.implClass = value;
         return this;
      }

      /**
       * Sets the {@link Bean#interceptor()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder interceptor(Class<? extends BeanInterceptor<?>> value) {
         this.interceptor = value;
         return this;
      }

      /**
       * Sets the {@link Bean#interfaceClass()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder interfaceClass(Class<?> value) {
         this.interfaceClass = value;
         return this;
      }

      /**
       * Sets the {@link Bean#properties()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder properties(String value) {
         this.properties = value;
         return this;
      }

      /**
       * Sets the {@link Bean#p()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder p(String value) {
         this.p = value;
         return this;
      }

      /**
       * Sets the {@link Bean#propertyNamer()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder propertyNamer(Class<? extends PropertyNamer> value) {
         this.propertyNamer = value;
         return this;
      }

      /**
       * Sets the {@link Bean#readOnlyProperties()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder readOnlyProperties(String value) {
         this.readOnlyProperties = value;
         return this;
      }

      /**
       * Sets the {@link Bean#ro()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder ro(String value) {
         this.ro = value;
         return this;
      }

      /**
       * Sets the {@link Bean#sort()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder sort(boolean value) {
         this.sort = value;
         return this;
      }

      /**
       * Sets the {@link Bean#stopClass()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder stopClass(Class<?> value) {
         this.stopClass = value;
         return this;
      }

      /**
       * Sets the {@link Bean#typeName()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder typeName(String value) {
         this.typeName = value;
         return this;
      }

      /**
       * Sets the {@link Bean#typePropertyName()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder typePropertyName(String value) {
         this.typePropertyName = value;
         return this;
      }

      /**
       * Sets the{@link Bean#wo()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder wo(String value) {
         this.wo = value;
         return this;
      }

      /**
       * Sets the{@link Bean#writeOnlyProperties()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder writeOnlyProperties(String value) {
         this.writeOnlyProperties = value;
         return this;
      }

      /**
       * Sets the {@link Bean#xp()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder xp(String value) {
         this.xp = value;
         return this;
      }

   }

   //-----------------------------------------------------------------------------------------------------------------
   // Implementation
   //-----------------------------------------------------------------------------------------------------------------

   private static class Impl extends TargetedAnnotationTImpl implements Bean {

      private final boolean findFluentSetters, sort;
      private final Class<? extends BeanInterceptor<?>> interceptor;
      private final Class<? extends PropertyNamer> propertyNamer;
      private final Class<?> implClass, interfaceClass, stopClass;
      private final Class<?>[] dictionary;
      private final String example, excludeProperties, p, properties, readOnlyProperties, ro, typeName, typePropertyName, wo, writeOnlyProperties, xp;

      Impl(Builder b) {
         super(b);
         this.dictionary = copyOf(b.dictionary);
         this.example = b.example;
         this.excludeProperties = b.excludeProperties;
         this.findFluentSetters = b.findFluentSetters;
         this.implClass = b.implClass;
         this.interceptor = b.interceptor;
         this.interfaceClass = b.interfaceClass;
         this.p = b.p;
         this.properties = b.properties;
         this.propertyNamer = b.propertyNamer;
         this.readOnlyProperties = b.readOnlyProperties;
         this.ro = b.ro;
         this.sort = b.sort;
         this.stopClass = b.stopClass;
         this.typeName = b.typeName;
         this.typePropertyName = b.typePropertyName;
         this.wo = b.wo;
         this.writeOnlyProperties = b.writeOnlyProperties;
         this.xp = b.xp;
         postConstruct();
      }

      @Override /* Bean */
      public Class<?>[] dictionary() {
         return dictionary;
      }

      @Override /* Bean */
      public String example() {
         return example;
      }

      @Override /* Bean */
      public String excludeProperties() {
         return excludeProperties;
      }

      @Override /* Bean */
      public boolean findFluentSetters() {
         return findFluentSetters;
      }

      @Override /* Bean */
      public Class<?> implClass() {
         return implClass;
      }

      @Override /* Bean */
      public Class<? extends BeanInterceptor<?>> interceptor() {
         return interceptor;
      }

      @Override /* Bean */
      public Class<?> interfaceClass() {
         return interfaceClass;
      }

      @Override /* Bean */
      public String p() {
         return p;
      }

      @Override /* Bean */
      public String properties() {
         return properties;
      }

      @Override /* Bean */
      public Class<? extends PropertyNamer> propertyNamer() {
         return propertyNamer;
      }

      @Override /* Bean */
      public String readOnlyProperties() {
         return readOnlyProperties;
      }

      @Override /* Bean */
      public String ro() {
         return ro;
      }

      @Override /* Bean */
      public boolean sort() {
         return sort;
      }

      @Override /* Bean */
      public Class<?> stopClass() {
         return stopClass;
      }

      @Override /* Bean */
      public String typeName() {
         return typeName;
      }

      @Override /* Bean */
      public String typePropertyName() {
         return typePropertyName;
      }

      @Override /* Bean */
      public String writeOnlyProperties() {
         return writeOnlyProperties;
      }

      @Override /* Bean */
      public String wo() {
         return wo;
      }

      @Override /* Bean */
      public String xp() {
         return xp;
      }
   }

   //-----------------------------------------------------------------------------------------------------------------
   // Appliers
   //-----------------------------------------------------------------------------------------------------------------

   /**
    * Applies targeted {@link Bean} annotations to a {@link org.apache.juneau.BeanContext.Builder}.
    */
   public static class Applier extends AnnotationApplier<Bean,BeanContext.Builder> {

      /**
       * Constructor.
       *
       * @param vr The resolver for resolving values in annotations.
       */
      public Applier(VarResolverSession vr) {
         super(Bean.class, BeanContext.Builder.class, vr);
      }

      @Override
      public void apply(AnnotationInfo<Bean> ai, BeanContext.Builder b) {
         Bean a = ai.inner();
         if (isEmptyArray(a.on(), a.onClass()))
            return;
         b.annotations(copy(a, vr()));
      }
   }

   //-----------------------------------------------------------------------------------------------------------------
   // Other
   //-----------------------------------------------------------------------------------------------------------------

   /**
    * A collection of {@link Bean @Bean annotations}.
    */
   @Documented
   @Target({METHOD,TYPE})
   @Retention(RUNTIME)
   @Inherited
   public static @interface Array {

      /**
       * The child annotations.
       *
       * @return The annotation value.
       */
      Bean[] value();
   }
}