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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.ByteArrayInputStream;
- import java.io.DataInputStream;
- import java.io.DataOutputStream;
- import java.io.IOException;
-
- import org.aspectj.apache.bcel.Constants;
-
- /**
- * Represents the BootstrapMethods attribute in Java 7 classes.
- *
- * @author Andy Clement
- */
- public final class BootstrapMethods extends Attribute {
-
- // if 'isInPackedState' then this data needs unpacking
- private boolean isInPackedState = false;
- private byte[] data; // discarded once unpacked
-
- private int numBootstrapMethods;
- private BootstrapMethod[] bootstrapMethods;
-
- public BootstrapMethods(BootstrapMethods c) {
- this(c.getNameIndex(), c.getLength(), c.getBootstrapMethods(), c.getConstantPool());
- }
-
- public BootstrapMethods(int nameIndex, int length, BootstrapMethod[] lineNumberTable, ConstantPool constantPool) {
- super(Constants.ATTR_BOOTSTRAPMETHODS, nameIndex, length, constantPool);
- setBootstrapMethods(lineNumberTable);
- isInPackedState = false;
- }
-
- public final void setBootstrapMethods(BootstrapMethod[] bootstrapMethods) {
- this.data = null;
- this.isInPackedState = false;
- this.bootstrapMethods = bootstrapMethods;
- this.numBootstrapMethods = bootstrapMethods==null?0:bootstrapMethods.length;
- }
-
- BootstrapMethods(int name_index, int length, DataInputStream file, ConstantPool constant_pool) throws IOException {
- this(name_index, length, (BootstrapMethod[])null, constant_pool);
- data = new byte[length];
- file.readFully(data);
- isInPackedState = true;
- }
-
- public static class BootstrapMethod {
- private int bootstrapMethodRef;
- private int[] bootstrapArguments;
-
- BootstrapMethod(DataInputStream file) throws IOException {
- this(file.readUnsignedShort(), readBootstrapArguments(file));
- }
-
- private static int[] readBootstrapArguments(DataInputStream dis) throws IOException {
- int numBootstrapMethods = dis.readUnsignedShort();
- int[] bootstrapArguments = new int[numBootstrapMethods];
- for (int i=0;i<numBootstrapMethods;i++) {
- bootstrapArguments[i] = dis.readUnsignedShort();
- }
- return bootstrapArguments;
- }
-
- public BootstrapMethod(int bootstrapMethodRef, int[] bootstrapArguments) {
- this.bootstrapMethodRef = bootstrapMethodRef;
- this.bootstrapArguments = bootstrapArguments;
- }
-
- public int getBootstrapMethodRef() {
- return bootstrapMethodRef;
- }
-
- public int[] getBootstrapArguments() {
- return bootstrapArguments;
- }
-
- public final void dump(DataOutputStream file) throws IOException {
- file.writeShort(bootstrapMethodRef);
- int len = bootstrapArguments.length;
- file.writeShort(len);
- for (int i=0;i<len;i++) {
- file.writeShort(bootstrapArguments[i]);
- }
- }
-
- public final int getLength() {
- return 2 /*bootstrapMethodRef*/+
- 2 /*number of arguments*/+
- 2 * bootstrapArguments.length;
- }
-
- }
-
- // Unpacks the byte array into the table
- private void unpack() {
- if (isInPackedState) {
- try {
- ByteArrayInputStream bs = new ByteArrayInputStream(data);
- DataInputStream dis = new DataInputStream(bs);
- numBootstrapMethods = dis.readUnsignedShort();
- bootstrapMethods = new BootstrapMethod[numBootstrapMethods];
- for (int i = 0; i < numBootstrapMethods; i++) {
- bootstrapMethods[i] = new BootstrapMethod(dis);
- }
- dis.close();
- data = null; // throw it away now
- } catch (IOException e) {
- throw new RuntimeException("Unpacking of LineNumberTable attribute failed");
- }
- isInPackedState = false;
- }
- }
-
- /**
- * 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
- */
- @Override
- public void accept(ClassVisitor v) {
- unpack();
- v.visitBootstrapMethods(this);
- }
-
- /**
- * Dump line number table attribute to file stream in binary format.
- *
- * @param file Output file stream
- * @throws IOException
- */
- @Override
- public final void dump(DataOutputStream file) throws IOException {
- super.dump(file);
- if (isInPackedState) {
- file.write(data);
- } else {
- int blen = bootstrapMethods.length;
- file.writeShort(blen);
- for (int i = 0; i < blen; i++) {
- bootstrapMethods[i].dump(file);
- }
- }
- }
-
- public final BootstrapMethod[] getBootstrapMethods() {
- unpack();
- return bootstrapMethods;
- }
-
-
- /**
- * @return String representation.
- */
- @Override
- public final String toString() {
- unpack();
- StringBuffer buf = new StringBuffer();
- StringBuffer line = new StringBuffer();
-
- for (int i = 0; i < numBootstrapMethods; i++) {
- BootstrapMethod bm = bootstrapMethods[i];
- line.append("BootstrapMethod[").append(i).append("]:");
- int ref = bm.getBootstrapMethodRef();
- ConstantMethodHandle mh = (ConstantMethodHandle)getConstantPool().getConstant(ref);
- line.append("#"+ref+":");
- line.append(ConstantMethodHandle.kindToString(mh.getReferenceKind()));
- line.append(" ").append(getConstantPool().getConstant(mh.getReferenceIndex()));
- int [] args = bm.getBootstrapArguments();
- line.append(" argcount:").append(args==null?0:args.length).append(" ");
- if (args!=null) {
- for (int a=0;a<args.length;a++) {
- line.append(args[a]).append("(").append(getConstantPool().getConstant(args[a])).append(") ");
- }
- }
-
-
- if (i < numBootstrapMethods - 1) {
- line.append(", ");
- }
-
- if (line.length() > 72) {
- line.append('\n');
- buf.append(line);
- line.setLength(0);
- }
- }
-
- buf.append(line);
-
- return buf.toString();
- }
-
-
- /**
- * @return deep copy of this attribute
- */
- // @Override
- // public Attribute copy(ConstantPool constant_pool) {
- // unpack();
- // LineNumberTable newTable = (LineNumberTable) clone();
- // newTable.table = new LineNumber[tableLength];
- // for (int i = 0; i < tableLength; i++) {
- // newTable.table[i] = table[i].copy();
- // }
- // newTable.cpool = constant_pool;
- // return newTable;
- // }
- public final int getNumBootstrapMethods () {
- unpack();
- return bootstrapMethods.length;
- }
- }
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