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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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package com.sun.jersey.api.model;

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

/**
 * Abstraction for resource class
 */
public class AbstractResource implements PathAnnotated, AbstractModelComponent, AnnotatedElement {

    private final Class resourceClass;
    private final PathValue uriPath;
    private final List constructors;
    private final List fields;
    private final List setterMethods;
    private final List resourceMethods;
    private final List subResourceMethods;
    private final List subResourceLocators;
    private final List postConstructMethods;
    private final List preDestroyMethods;

    /**
     * Creates a new instance of AbstractResource
     */
    public AbstractResource(Class resourceClass) {
        this(resourceClass, null);
    }

    /**
     * Creates a new instance of AbstractResource
     */
    public AbstractResource(Class resourceClass, PathValue uriPath) {
        this.resourceClass = resourceClass;
        this.uriPath = uriPath;
        this.constructors = new ArrayList(4);
        this.fields = new ArrayList(4);
        this.setterMethods = new ArrayList(2);
        this.resourceMethods = new ArrayList(4);
        this.subResourceLocators = new ArrayList(4);
        this.subResourceMethods = new ArrayList(4);
        this.postConstructMethods = new ArrayList(1);
        this.preDestroyMethods = new ArrayList(1);
    }

    /**
     * Create a new instance from an existing AbstractResource but
     * defining a new path.
     *
     * @param path the path.
     * @param ar the existing abstract resource.
     */
    public AbstractResource(String path, AbstractResource ar) {
        this.uriPath = new PathValue(path);

        this.resourceClass = ar.resourceClass;
        this.constructors = ar.constructors;
        this.fields = ar.fields;
        this.setterMethods = ar.setterMethods;
        this.resourceMethods = ar.resourceMethods;
        this.subResourceMethods = ar.subResourceMethods;
        this.subResourceLocators = ar.subResourceLocators;
        this.postConstructMethods = ar.postConstructMethods;
        this.preDestroyMethods = ar.preDestroyMethods;
    }

    public Class getResourceClass() {
        return resourceClass;
    }

    public boolean isSubResource() {
        return uriPath == null;
    }

    public boolean isRootResource() {
        return uriPath != null;
    }

    @Override
    public PathValue getPath() {
        return uriPath;
    }

    public List getConstructors() {
        return constructors;
    }

    public List getFields() {
        return fields;
    }

    public List getSetterMethods() {
        return setterMethods;
    }

    /**
     * Provides a non-null list of resource methods available on the resource
     * 
     * @return non-null abstract resource method list
     */
    public List getResourceMethods() {
        return resourceMethods;
    }

    /**
     * Provides a non-null list of subresource methods available on the resource
     * 
     * @return non-null abstract subresource method list
     */
    public List getSubResourceMethods() {
        return subResourceMethods;
    }

    /**
     * Provides a non-null list of subresource locators available on the resource
     * 
     * @return non-null abstract subresource locator list
     */
    public List getSubResourceLocators() {
        return subResourceLocators;
    }

    /**
     * @return the postCreate
     */
    public List getPostConstructMethods() {
        return postConstructMethods;
    }

    /**
     * @return the preDestroy
     */
    public List getPreDestroyMethods() {
        return preDestroyMethods;
    }

    @Override
    public void accept(AbstractModelVisitor visitor) {
        visitor.visitAbstractResource(this);
    }

    // Annotated element
    @Override
    public boolean isAnnotationPresent(Class a) {
        return resourceClass.isAnnotationPresent(a);
    }

    @Override
    public  T getAnnotation(Class a) {
        return resourceClass.getAnnotation(a);
    }

    @Override
    public Annotation[] getAnnotations() {
        return resourceClass.getAnnotations();
    }

    @Override
    public Annotation[] getDeclaredAnnotations() {
        return resourceClass.getDeclaredAnnotations();
    }

    @Override
    public String toString() {
        return "AbstractResource("
                + ((null == getPath()) ? "" : ("\"" + getPath().getValue() + "\", - "))
                + getResourceClass().getSimpleName() + ": "
                + getConstructors().size() + " constructors, "
                + getFields().size() + " fields, "
                + getSetterMethods().size() + " setter methods, "
                + getResourceMethods().size() + " res methods, "
                + getSubResourceMethods().size() + " subres methods, "
                + getSubResourceLocators().size() + " subres locators " + ")";
    }

    @Override
    public List getComponents() {
        List components = new LinkedList();
        components.addAll(getConstructors());
        components.addAll(getFields());
        components.addAll(getSetterMethods());
        components.addAll(getResourceMethods());
        components.addAll(getSubResourceMethods());
        components.addAll(getSubResourceLocators());
        return components;
    }
}