- package com.sun.org.apache.bcel.internal.classfile;
-
- /* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" and
- * "Apache BCEL" must not be used to endorse or promote products
- * derived from this software without prior written permission. For
- * written permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * "Apache BCEL", nor may "Apache" appear in their name, without
- * prior written permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
-
- import com.sun.org.apache.bcel.internal.Constants;
- import java.io.*;
-
- /**
- * This class is derived from the abstract
- * <A HREF="com.sun.org.apache.bcel.internal.classfile.Constant.html">Constant</A> class
- * and represents a reference to a String object.
- *
- * @version $Id: ConstantString.java,v 1.1.1.1 2001/10/29 20:00:00 jvanzyl Exp $
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- * @see Constant
- */
- public final class ConstantString extends Constant implements ConstantObject {
- private int string_index; // Identical to ConstantClass except for this name
-
- /**
- * Initialize from another object.
- */
- public ConstantString(ConstantString c) {
- this(c.getStringIndex());
- }
- /**
- * Initialize instance from file data.
- *
- * @param file Input stream
- * @throw IOException
- */
- ConstantString(DataInputStream file) throws IOException
- {
- this((int)file.readUnsignedShort());
- }
- /**
- * @param string_index Index of Constant_Utf8 in constant pool
- */
- public ConstantString(int string_index)
- {
- super(Constants.CONSTANT_String);
- this.string_index = string_index;
- }
- /**
- * Called by objects that are traversing the nodes of the tree implicitely
- * defined by the contents of a Java class. I.e., the hierarchy of methods,
- * fields, attributes, etc. spawns a tree of objects.
- *
- * @param v Visitor object
- */
- public void accept(Visitor v) {
- v.visitConstantString(this);
- }
- /**
- * Dump constant field reference to file stream in binary format.
- *
- * @param file Output file stream
- * @throw IOException
- */
- public final void dump(DataOutputStream file) throws IOException
- {
- file.writeByte(tag);
- file.writeShort(string_index);
- }
- /**
- * @return Index in constant pool of the string (ConstantUtf8).
- */
- public final int getStringIndex() { return string_index; }
- /**
- * @param string_index.
- */
- public final void setStringIndex(int string_index) {
- this.string_index = string_index;
- }
- /**
- * @return String representation.
- */
- public final String toString()
- {
- return super.toString() + "(string_index = " + string_index + ")";
- }
-
- /** @return String object
- */
- public Object getConstantValue(ConstantPool cp) {
- Constant c = cp.getConstant(string_index, Constants.CONSTANT_Utf8);
- return ((ConstantUtf8)c).getBytes();
- }
-
- /** @return dereferenced string
- */
- public String getBytes(ConstantPool cp) {
- return (String)getConstantValue(cp);
- }
- }