/*

 * 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.lang.annotation.Annotation;

import java.util.ArrayList;

import java.util.List;

import java.util.Collection;

import java.util.Collections;

/**

 * Variables and fields.

 */

public class JVar extends JExpressionImpl implements JDeclaration, JAssignmentTarget, JAnnotatable {

    /**

     * Modifiers.

     */

    private JMods mods;

    /**

     * JType of the variable

     */

    private JType type;

    /**

     * Name of the variable

     */

    private String name;

    /**

     * Initialization of the variable in its declaration

     */

    private JExpression init;

    /**

     * Annotations on this variable. Lazily created.

     */

    private List<JAnnotationUse> annotations = null;

    /**

     * JVar constructor

     *

     * @param type

     *        Datatype of this variable

     *

     * @param name

     *        Name of this variable

     *

     * @param init

     *        Value to initialize this variable to

     */

    JVar(JMods mods, JType type, String name, JExpression init) {

        this.mods = mods;

        this.type = type;

        this.name = name;

        this.init = init;

    }

    /**

     * Initialize this variable

     *

     * @param init

     *        JExpression to be used to initialize this field

     */

    public JVar init(JExpression init) {

        this.init = init;

        return this;

    }

    /**

     * Get the name of this variable

     *

     * @return Name of the variable

     */

    public String name() {

        return name;

    }

    /**

     * Changes the name of this variable.

     */

    public void name(String name) {

        if(!JJavaName.isJavaIdentifier(name))

            throw new IllegalArgumentException();

        this.name = name;

    }

    /**

     * Return the type of this variable.

     * @return

     *      always non-null.

     */

    public JType type() {

        return type;

    }

    /**

     * @return

     *      the current modifiers of this method.

     *      Always return non-null valid object.

     */

    public JMods mods() {

        return mods;

    }

    /**

     * Sets the type of this variable.

     *

     * @param newType

     *      must not be null.

     *

     * @return

     *      the old type value. always non-null.

     */

    public JType type(JType newType) {

        JType r = type;

        if(newType==null)

            throw new IllegalArgumentException();

        type = newType;

        return r;

    }

    /**

     * 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);

    }

    public Collection<JAnnotationUse> annotations() {

        if (annotations == null)

            annotations = new ArrayList<JAnnotationUse>();

        return Collections.unmodifiableList(annotations);

    }

    protected boolean isAnnotated() {

        return annotations!=null;

    }

    public void bind(JFormatter f) {

        if (annotations != null){

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

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

        }

        f.g(mods).g(type).id(name);

        if (init != null)

            f.p('=').g(init);

    }

    public void declare(JFormatter f) {

        f.b(this).p(';').nl();

    }

    public void generate(JFormatter f) {

        f.id(name);

    }

    public JExpression assign(JExpression rhs) {

                return JExpr.assign(this,rhs);

    }

    public JExpression assignPlus(JExpression rhs) {

                return JExpr.assignPlus(this,rhs);

    }

}