- 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 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 com.sun.org.apache.bcel.internal.Constants;
- import java.io.*;
-
- /**
- * This class is derived from <em>Attribute</em> and represents a reference
- * to a <href="http://wwwipd.ira.uka.de/~pizza/gj/">GJ</a> attribute.
- *
- * @version $Id: Signature.java,v 1.1.1.1 2001/10/29 20:00:03 jvanzyl Exp $
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- * @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
- * @throw 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");
- }
-
- /**
- * Dump source file attribute to file stream in binary format.
- *
- * @param file Output file stream
- * @throw 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();
- }
- }