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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
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 [email protected].
*
* 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
* GJ attribute.
*
* @version $Id: Signature.java,v 1.3 2007-07-19 04:34:43 ofung Exp $
* @author M. Dahm
* @see Attribute
*/
public final class Signature extends Attribute {
private int signature_index;
/**
* Initialize from another object. Note that both objects use the same
* references (shallow copy). Use clone() for a physical copy.
*/
public Signature(Signature c) {
this(c.getNameIndex(), c.getLength(), c.getSignatureIndex(), c.getConstantPool());
}
/**
* Construct object from file stream.
* @param name_index Index in constant pool to CONSTANT_Utf8
* @param length Content length in bytes
* @param file Input stream
* @param constant_pool Array of constants
* @throws IOException
*/
Signature(int name_index, int length, DataInputStream file,
ConstantPool constant_pool) throws IOException
{
this(name_index, length, file.readUnsignedShort(), constant_pool);
}
/**
* @param name_index Index in constant pool to CONSTANT_Utf8
* @param length Content length in bytes
* @param constant_pool Array of constants
* @param Signature_index Index in constant pool to CONSTANT_Utf8
*/
public Signature(int name_index, int length, int signature_index,
ConstantPool constant_pool)
{
super(Constants.ATTR_SIGNATURE, name_index, length, constant_pool);
this.signature_index = signature_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) {
System.err.println("Visiting non-standard Signature object");
v.visitSignature(this);
}
/**
* Dump source file attribute to file stream in binary format.
*
* @param file Output file stream
* @throws IOException
*/
public final void dump(DataOutputStream file) throws IOException
{
super.dump(file);
file.writeShort(signature_index);
}
/**
* @return Index in constant pool of source file name.
*/
public final int getSignatureIndex() { return signature_index; }
/**
* @param Signature_index.
*/
public final void setSignatureIndex(int signature_index) {
this.signature_index = signature_index;
}
/**
* @return GJ signature.
*/
public final String getSignature() {
ConstantUtf8 c = (ConstantUtf8)constant_pool.getConstant(signature_index,
Constants.CONSTANT_Utf8);
return c.getBytes();
}
/**
* Extends ByteArrayInputStream to make 'unreading' chars possible.
*/
private static final class MyByteArrayInputStream extends ByteArrayInputStream {
MyByteArrayInputStream(String data) { super(data.getBytes()); }
final int mark() { return pos; }
final String getData() { return new String(buf); }
final void reset(int p) { pos = p; }
final void unread() { if(pos > 0) pos--; }
}
private static boolean identStart(int ch) {
return ch == 'T' || ch == 'L';
}
private static boolean identPart(int ch) {
return ch == '/' || ch == ';';
}
private static final void matchIdent(MyByteArrayInputStream in, StringBuffer buf) {
int ch;
if((ch = in.read()) == -1)
throw new RuntimeException("Illegal signature: " + in.getData() +
" no ident, reaching EOF");
//System.out.println("return from ident:" + (char)ch);
if(!identStart(ch)) {
StringBuffer buf2 = new StringBuffer();
int count = 1;
while(Character.isJavaIdentifierPart((char)ch)) {
buf2.append((char)ch);
count++;
ch = in.read();
}
if(ch == ':') { // Ok, formal parameter
in.skip("Ljava/lang/Object".length());
buf.append(buf2);
ch = in.read();
in.unread();
//System.out.println("so far:" + buf2 + ":next:" +(char)ch);
} else {
for(int i=0; i < count; i++)
in.unread();
}
return;
}
StringBuffer buf2 = new StringBuffer();
ch = in.read();
do {
buf2.append((char)ch);
ch = in.read();
//System.out.println("within ident:"+ (char)ch);
} while((ch != -1) && (Character.isJavaIdentifierPart((char)ch) || (ch == '/')));
buf.append(buf2.toString().replace('/', '.'));
//System.out.println("regular return ident:"+ (char)ch + ":" + buf2);
if(ch != -1)
in.unread();
}
private static final void matchGJIdent(MyByteArrayInputStream in,
StringBuffer buf)
{
int ch;
matchIdent(in, buf);
ch = in.read();
if((ch == '<') || ch == '(') { // Parameterized or method
//System.out.println("Enter <");
buf.append((char)ch);
matchGJIdent(in, buf);
while(((ch = in.read()) != '>') && (ch != ')')) { // List of parameters
if(ch == -1)
throw new RuntimeException("Illegal signature: " + in.getData() +
" reaching EOF");
//System.out.println("Still no >");
buf.append(", ");
in.unread();
matchGJIdent(in, buf); // Recursive call
}
//System.out.println("Exit >");
buf.append((char)ch);
} else
in.unread();
ch = in.read();
if(identStart(ch)) {
in.unread();
matchGJIdent(in, buf);
} else if(ch == ')') {
in.unread();
return;
} else if(ch != ';')
throw new RuntimeException("Illegal signature: " + in.getData() + " read " +
(char)ch);
}
public static String translate(String s) {
//System.out.println("Sig:" + s);
StringBuffer buf = new StringBuffer();
matchGJIdent(new MyByteArrayInputStream(s), buf);
return buf.toString();
}
public static final boolean isFormalParameterList(String s) {
return s.startsWith("<") && (s.indexOf(':') > 0);
}
public static final boolean isActualParameterList(String s) {
return s.startsWith("L") && s.endsWith(">;");
}
/**
* @return String representation
*/
public final String toString() {
String s = getSignature();
return "Signature(" + s + ")";
}
/**
* @return deep copy of this attribute
*/
public Attribute copy(ConstantPool constant_pool) {
return (Signature)clone();
}
}