package com.lexicalscope.fluentreflection;

 import static java.lang.System.arraycopy;

 import java.lang.annotation.Annotation;

 import java.util.ArrayList;

 import java.util.List;

 import org.apache.commons.lang3.builder.HashCodeBuilder;

 import org.hamcrest.Matcher;

 /*

  * Copyright 2012 Tim Wood

  *

  * Licensed 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.

  */

 abstract class BoundFluentMemberImpl implements FluentMember {

     private final ReflectedTypeFactory reflectedTypeFactory;

     private final FluentMember member;

     private final Object instance;

     public BoundFluentMemberImpl(

             final ReflectedTypeFactory reflectedTypeFactory,

             final FluentMember member,

             final Object instance) {

         this.reflectedTypeFactory = reflectedTypeFactory;

         if (member.isStatic()) {

             throw new IllegalArgumentException("cannot bind static member " + member);

         }

         this.member = member;

         this.instance = instance;

     }

     @Override public final int argCount() {

         return member.argCount();

     }

     @Override public final List<FluentClass<?>> args() {

         return new ArrayList<FluentClass<?>>(member.args());

     }

     @SuppressWarnings("unchecked") @Override public FluentObject<?> call(final Object... args) {

         final Object object = callRaw(args);

         if(object == null) {

             return null;

         }

         return reflectedTypeFactory.reflect((Class) object.getClass(), object);

     }

     @Override public final Object callRaw(final Object... args) {

         final Object[] argsWithInstance = new Object[args.length + 1];

         argsWithInstance[0] = instance;

         arraycopy(args, 0, argsWithInstance, 1, args.length);

         return member.callRaw(argsWithInstance);

     }

     @Override public final FluentClass<?> declarer() {

         return member.declarer();

     }

     @Override public final String name() {

         return member.name();

     }

     @Override public final boolean isStatic() {

         return false;

     }

     @Override public final Visibility visibility() {

         return member.visibility();

     }

     @Override public final boolean isFinal() {

         return member.isFinal();

     }

     @Override public final int hashCode() {

         return new HashCodeBuilder().append(instance).append(member).toHashCode();

     }

     @Override public final FluentClass<?> type() {

         return member.type();

     }

     @Override public final FluentClass<?> annotation(final Matcher<? super FluentClass<?>> annotationMatcher) {

         return member.annotation(annotationMatcher);

     }

     @Override public final <A extends Annotation> A annotation(final Class<A> annotationClass) {

         return member.annotation(annotationClass);

     }

     @Override public final boolean annotatedWith(final Class<? extends Annotation> annotationClass) {

         return member.annotatedWith(annotationClass);

     }

     @Override public boolean annotatedWith(final Matcher<? super FluentClass<?>> annotationMatcher) {

         return member.annotatedWith(annotationMatcher);

     }

     @Override public final String property() {

         return member.property();

     }

     @Override public final <T> FluentCall<T> as(final Class<T> returnType) {

         return new AbstractCall<T>(reflectedTypeFactory) {

             @Override public T callRaw(final Object... args) {

                 return returnType.cast(BoundFluentMemberImpl.this.callRaw(args));

             }

         };

     }

     @Override public final boolean equals(final Object that) {

         if(this == that) {

             return true;

         } else  if(that != null && that.getClass().equals(this.getClass())) {

             final BoundFluentMemberImpl castedThat = (BoundFluentMemberImpl) that;

             return castedThat.instance.equals(this.instance) && castedThat.member.equals(this.member);

         }

         return false;

     }

 }