/*

 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package com.sun.codemodel.internal;

import java.util.ArrayList;

import java.util.List;

import java.util.Collection;

import java.util.Collections;

import java.lang.annotation.Annotation;

/**

 * Enum Constant.

 *

 * When used as an {@link JExpression}, this object represents a reference to the enum constant.

 *

 * @author

 *     Bhakti Mehta (Bhakti.Mehta@sun.com)

 */

public final class JEnumConstant extends JExpressionImpl implements JDeclaration, JAnnotatable, JDocCommentable {

    /**

     * The constant.

     */

    private final String name;

    /**

     * The enum class.

     */

    private final JDefinedClass type;

    /**

     * javadoc comments, if any.

     */

    private JDocComment jdoc = null;

    /**

     * Annotations on this variable. Lazily created.

     */

    private List<JAnnotationUse> annotations = null;

    /**

     * List of the constructor argument expressions.

     * Lazily constructed.

     */

    private List<JExpression> args = null;

    JEnumConstant(JDefinedClass type,String name) {

        this.name = name;

        this.type = type;

    }

    /**

     *  Add an expression to this constructor's argument list

     *

     * @param arg

     *        Argument to add to argument list

     */

    public JEnumConstant arg(JExpression arg) {

        if(arg==null)   throw new IllegalArgumentException();

        if(args==null)

            args = new ArrayList<JExpression>();

        args.add(arg);

        return this;

    }

    /**

     * Returns the name of this constant.

     *

     * @return never null.

     */

    public String getName() {

        return this.type.fullName().concat(".").concat(this.name);

    }

    /**

     * Creates, if necessary, and returns the enum constant javadoc.

     *

     * @return JDocComment containing javadocs for this constant.

     */

    public JDocComment javadoc() {

        if (jdoc == null)

            jdoc = new JDocComment(type.owner());

        return jdoc;

    }

    /**

     * Adds an annotation to this variable.

     * @param clazz

     *          The annotation class to annotate the field with

     */

    public JAnnotationUse annotate(JClass clazz){

        if(annotations==null)

           annotations = new ArrayList<JAnnotationUse>();

        JAnnotationUse a = new JAnnotationUse(clazz);

        annotations.add(a);

        return a;

    }

    /**

     * Adds an annotation to this variable.

     *

     * @param clazz

     *          The annotation class to annotate the field with

     */

    public JAnnotationUse annotate(Class <? extends Annotation> clazz){

        return annotate(type.owner().ref(clazz));

    }

    public <W extends JAnnotationWriter> W annotate2(Class<W> clazz) {

        return TypedAnnotationWriter.create(clazz,this);

    }

    public boolean removeAnnotation(JAnnotationUse annotation) {

        return this.annotations.remove(annotation);

    }

    /**

     * {@link JAnnotatable#annotations()}

     */

    public Collection<JAnnotationUse> annotations() {

        if (annotations == null)

            annotations = new ArrayList<JAnnotationUse>();

        return Collections.unmodifiableList(annotations);

    }

    public void declare(JFormatter f) {

        if( jdoc != null )

            f.nl().g( jdoc );

        if (annotations != null) {

            for( int i=0; i<annotations.size(); i++ )

                f.g(annotations.get(i)).nl();

        }

        f.id(name);

        if(args!=null) {

            f.p('(').g(args).p(')');

        }

    }

    public void generate(JFormatter f) {

        f.t(type).p('.').p(name);

    }

}