/*

 * Copyright (c) 1994, 2003, 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 sun.tools.tree;

import sun.tools.java.*;

import sun.tools.asm.Assembler;

import java.io.PrintStream;

/**

 * WARNING: The contents of this source file are not part of any

 * supported API.  Code that depends on them does so at its own risk:

 * they are subject to change or removal without notice.

 */

public

class StringExpression extends ConstantExpression {

    String value;

    /**

     * Constructor

     */

    public StringExpression(long where, String value) {

        super(STRINGVAL, where, Type.tString);

        this.value = value;

    }

    public boolean equals(String s) {

        return value.equals(s);

    }

    public boolean isNonNull() {

        return true;            // string literal is never null

    }

    /**

     * Code

     */

    public void codeValue(Environment env, Context ctx, Assembler asm) {

        asm.add(where, opc_ldc, this);

    }

    /**

     * Get the value

     */

    public Object getValue() {

        return value;

    }

    /**

     * Hashcode

     */

    public int hashCode() {

        return value.hashCode() ^ 3213;

    }

    /**

     * Equality

     */

    public boolean equals(Object obj) {

        if ((obj != null) && (obj instanceof StringExpression)) {

            return value.equals(((StringExpression)obj).value);

        }

        return false;

    }

    /**

     * Print

     */

    public void print(PrintStream out) {

        out.print("\"" + value + "\"");

    }

}