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- package org.aspectj.apache.bcel.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 java.io.DataInputStream;
- import java.io.DataOutputStream;
- import java.io.IOException;
-
- import org.aspectj.apache.bcel.Constants;
-
- /**
- * Abstract superclass for classes to represent the different constant types in the constant pool of a class file. The classes keep
- * closely to the JVM specification.
- *
- * @version $Id: Constant.java,v 1.5 2009/09/10 15:35:04 aclement Exp $
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- */
- public abstract class Constant implements Cloneable, Node {
-
- protected byte tag;
-
- Constant(byte tag) {
- this.tag = tag;
- }
-
- public final byte getTag() {
- return tag;
- }
-
- @Override
- public String toString() {
- return Constants.CONSTANT_NAMES[tag] + "[" + tag + "]";
- }
-
- public abstract void accept(ClassVisitor v);
-
- public abstract void dump(DataOutputStream dataOutputStream) throws IOException;
-
- public abstract Object getValue();
-
- public Constant copy() {
- try {
- return (Constant) super.clone();
- } catch (CloneNotSupportedException e) {
- }
-
- return null;
- }
-
- @Override
- public Object clone() throws CloneNotSupportedException {
- return super.clone();
- }
-
- static final Constant readConstant(DataInputStream dis) throws IOException, ClassFormatException {
- byte b = dis.readByte();
- switch (b) {
- case Constants.CONSTANT_Class:
- return new ConstantClass(dis);
- case Constants.CONSTANT_NameAndType:
- return new ConstantNameAndType(dis);
- case Constants.CONSTANT_Utf8:
- return new ConstantUtf8(dis);
- case Constants.CONSTANT_Fieldref:
- return new ConstantFieldref(dis);
- case Constants.CONSTANT_Methodref:
- return new ConstantMethodref(dis);
- case Constants.CONSTANT_InterfaceMethodref:
- return new ConstantInterfaceMethodref(dis);
- case Constants.CONSTANT_String:
- return new ConstantString(dis);
- case Constants.CONSTANT_Integer:
- return new ConstantInteger(dis);
- case Constants.CONSTANT_Float:
- return new ConstantFloat(dis);
- case Constants.CONSTANT_Long:
- return new ConstantLong(dis);
- case Constants.CONSTANT_Double:
- return new ConstantDouble(dis);
- default:
- throw new ClassFormatException("Invalid byte tag in constant pool: " + b);
- }
- }
-
- }
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