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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 org.aspectj.apache.bcel.Constants;
- import java.io.*;
-
- /**
- * This class represents the type of a local variable or item on stack
- * used in the StackMap entries.
- *
- * @version $Id: StackMapType.java,v 1.3 2008/05/28 23:53:02 aclement Exp $
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- * @see StackMapEntry
- * @see StackMap
- * @see Constants
- */
- public final class StackMapType implements Cloneable {
- private byte type;
- private int index = -1; // Index to CONSTANT_Class or offset
- private ConstantPool constant_pool;
-
- /**
- * Construct object from file stream.
- * @param file Input stream
- * @throws IOException
- */
- StackMapType(DataInputStream file, ConstantPool constant_pool) throws IOException
- {
- this(file.readByte(), -1, constant_pool);
-
- if(hasIndex())
- setIndex(file.readShort());
-
- setConstantPool(constant_pool);
- }
-
- /**
- * @param type type tag as defined in the Constants interface
- * @param index index to constant pool, or byte code offset
- */
- public StackMapType(byte type, int index, ConstantPool constant_pool) {
- setType(type);
- setIndex(index);
- setConstantPool(constant_pool);
- }
-
- public void setType(byte t) {
- if((t < Constants.ITEM_Bogus) || (t > Constants.ITEM_NewObject))
- throw new RuntimeException("Illegal type for StackMapType: " + t);
- type = t;
- }
-
- public byte getType() { return type; }
- public void setIndex(int t) { index = t; }
-
- /** @return index to constant pool if type == ITEM_Object, or offset
- * in byte code, if type == ITEM_NewObject, and -1 otherwise
- */
- public int getIndex() { return index; }
-
- /**
- * Dump type entries to file.
- *
- * @param file Output file stream
- * @throws IOException
- */
- public final void dump(DataOutputStream file) throws IOException
- {
- file.writeByte(type);
- if(hasIndex())
- file.writeShort(getIndex());
- }
-
- /** @return true, if type is either ITEM_Object or ITEM_NewObject
- */
- public final boolean hasIndex() {
- return ((type == Constants.ITEM_Object) ||
- (type == Constants.ITEM_NewObject));
- }
-
- private String printIndex() {
- if(type == Constants.ITEM_Object)
- return ", class=" + constant_pool.constantToString(index, Constants.CONSTANT_Class);
- else if(type == Constants.ITEM_NewObject)
- return ", offset=" + index;
- else
- return "";
- }
-
- /**
- * @return String representation
- */
- public final String toString() {
- return "(type=" + Constants.ITEM_NAMES[type] + printIndex() + ")";
- }
-
- /**
- * @return deep copy of this object
- */
- public StackMapType copy() {
- try {
- return (StackMapType)clone();
- } catch(CloneNotSupportedException e) {}
-
- return null;
- }
-
- /**
- * @return Constant pool used by this object.
- */
- public final ConstantPool getConstantPool() { return constant_pool; }
-
- /**
- * @param constant_pool Constant pool to be used for this object.
- */
- public final void setConstantPool(ConstantPool constant_pool) {
- this.constant_pool = constant_pool;
- }
- }
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