--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxp/src/com/sun/org/apache/bcel/internal/generic/LDC.java Thu Apr 12 08:38:26 2012 -0700
@@ -0,0 +1,175 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+package com.sun.org.apache.bcel.internal.generic;
+
+/* ====================================================================
+ * 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.*;
+import com.sun.org.apache.bcel.internal.util.ByteSequence;
+
+/**
+ * LDC - Push item from constant pool.
+ *
+ * <PRE>Stack: ... -> ..., item</PRE>
+ *
+ * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
+ */
+public class LDC extends CPInstruction
+ implements PushInstruction, ExceptionThrower, TypedInstruction {
+ /**
+ * Empty constructor needed for the Class.newInstance() statement in
+ * Instruction.readInstruction(). Not to be used otherwise.
+ */
+ LDC() {}
+
+ public LDC(int index) {
+ super(com.sun.org.apache.bcel.internal.Constants.LDC_W, index);
+ setSize();
+ }
+
+ // Adjust to proper size
+ protected final void setSize() {
+ if(index <= com.sun.org.apache.bcel.internal.Constants.MAX_BYTE) { // Fits in one byte?
+ opcode = com.sun.org.apache.bcel.internal.Constants.LDC;
+ length = 2;
+ } else {
+ opcode = com.sun.org.apache.bcel.internal.Constants.LDC_W;
+ length = 3;
+ }
+ }
+
+ /**
+ * Dump instruction as byte code to stream out.
+ * @param out Output stream
+ */
+ public void dump(DataOutputStream out) throws IOException {
+ out.writeByte(opcode);
+
+ if(length == 2)
+ out.writeByte(index);
+ else // Applies for LDC_W
+ out.writeShort(index);
+ }
+
+ /**
+ * Set the index to constant pool and adjust size.
+ */
+ public final void setIndex(int index) {
+ super.setIndex(index);
+ setSize();
+ }
+
+ /**
+ * Read needed data (e.g. index) from file.
+ */
+ protected void initFromFile(ByteSequence bytes, boolean wide)
+ throws IOException
+ {
+ length = 2;
+ index = bytes.readUnsignedByte();
+ }
+
+ public Object getValue(ConstantPoolGen cpg) {
+ com.sun.org.apache.bcel.internal.classfile.Constant c = cpg.getConstantPool().getConstant(index);
+
+ switch(c.getTag()) {
+ case com.sun.org.apache.bcel.internal.Constants.CONSTANT_String:
+ int i = ((com.sun.org.apache.bcel.internal.classfile.ConstantString)c).getStringIndex();
+ c = cpg.getConstantPool().getConstant(i);
+ return ((com.sun.org.apache.bcel.internal.classfile.ConstantUtf8)c).getBytes();
+
+ case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Float:
+ return new Float(((com.sun.org.apache.bcel.internal.classfile.ConstantFloat)c).getBytes());
+
+ case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Integer:
+ return new Integer(((com.sun.org.apache.bcel.internal.classfile.ConstantInteger)c).getBytes());
+
+ default: // Never reached
+ throw new RuntimeException("Unknown or invalid constant type at " + index);
+ }
+ }
+
+ public Type getType(ConstantPoolGen cpg) {
+ switch(cpg.getConstantPool().getConstant(index).getTag()) {
+ case com.sun.org.apache.bcel.internal.Constants.CONSTANT_String: return Type.STRING;
+ case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Float: return Type.FLOAT;
+ case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Integer: return Type.INT;
+ default: // Never reached
+ throw new RuntimeException("Unknown or invalid constant type at " + index);
+ }
+ }
+
+ public Class[] getExceptions() {
+ return com.sun.org.apache.bcel.internal.ExceptionConstants.EXCS_STRING_RESOLUTION;
+ }
+
+ /**
+ * Call corresponding visitor method(s). The order is:
+ * Call visitor methods of implemented interfaces first, then
+ * call methods according to the class hierarchy in descending order,
+ * i.e., the most specific visitXXX() call comes last.
+ *
+ * @param v Visitor object
+ */
+ public void accept(Visitor v) {
+ v.visitStackProducer(this);
+ v.visitPushInstruction(this);
+ v.visitExceptionThrower(this);
+ v.visitTypedInstruction(this);
+ v.visitCPInstruction(this);
+ v.visitLDC(this);
+ }
+}