/*

 * Copyright (c) 1997, 2012, 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;

/**

 * If statement, with optional else clause

 */

public class JConditional implements JStatement {

    /**

     * JExpression to test to determine branching

     */

    private JExpression test = null;

    /**

     * JBlock of statements for "then" clause

     */

    private JBlock _then = new JBlock();

    /**

     * JBlock of statements for optional "else" clause

     */

    private JBlock _else = null;

    /**

     * Constructor

     *

     * @param test

     *        JExpression which will determine branching

     */

    JConditional(JExpression test) {

       this.test = test;

    }

    /**

     * Return the block to be excuted by the "then" branch

     *

     * @return Then block

     */

    public JBlock _then() {

        return _then;

    }

    /**

     * Create a block to be executed by "else" branch

     *

     * @return Newly generated else block

     */

    public JBlock _else() {

        if (_else == null) _else = new JBlock();

        return _else;

    }

    /**

     * Creates {@code ... else if(...) ...} code.

     */

    public JConditional _elseif(JExpression boolExp) {

        return _else()._if(boolExp);

    }

    public void state(JFormatter f) {

        if(test==JExpr.TRUE) {

            _then.generateBody(f);

            return;

        }

        if(test==JExpr.FALSE) {

            _else.generateBody(f);

            return;

        }

        if (JOp.hasTopOp(test)) {

            f.p("if ").g(test);

        } else {

            f.p("if (").g(test).p(')');

        }

        f.g(_then);

        if (_else != null)

            f.p("else").g(_else);

        f.nl();

    }

}