| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.sun.org.apache.bcel.internal.classfile; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInput; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| |
| /** |
| * This class is derived from <em>Attribute</em> and represents a reference |
| * to a GJ attribute. |
| * |
| * @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(final 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 input Input stream |
| * @param constant_pool Array of constants |
| * @throws IOException |
| */ |
| Signature(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) |
| throws IOException { |
| this(name_index, length, input.readUnsignedShort(), constant_pool); |
| } |
| |
| |
| /** |
| * @param name_index Index in constant pool to CONSTANT_Utf8 |
| * @param length Content length in bytes |
| * @param signature_index Index in constant pool to CONSTANT_Utf8 |
| * @param constant_pool Array of constants |
| */ |
| public Signature(final int name_index, final int length, final int signature_index, final ConstantPool constant_pool) { |
| super(Const.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 |
| */ |
| @Override |
| public void accept( final 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 |
| */ |
| @Override |
| public void dump( final DataOutputStream file ) throws IOException { |
| super.dump(file); |
| file.writeShort(signature_index); |
| } |
| |
| |
| /** |
| * @return Index in constant pool of source file name. |
| */ |
| public int getSignatureIndex() { |
| return signature_index; |
| } |
| |
| |
| /** |
| * @param signature_index the index info the constant pool of this signature |
| */ |
| public void setSignatureIndex( final int signature_index ) { |
| this.signature_index = signature_index; |
| } |
| |
| |
| /** |
| * @return GJ signature. |
| */ |
| public String getSignature() { |
| final ConstantUtf8 c = (ConstantUtf8) super.getConstantPool().getConstant(signature_index, |
| Const.CONSTANT_Utf8); |
| return c.getBytes(); |
| } |
| |
| /** |
| * Extends ByteArrayInputStream to make 'unreading' chars possible. |
| */ |
| private static final class MyByteArrayInputStream extends ByteArrayInputStream { |
| |
| MyByteArrayInputStream(final String data) { |
| super(data.getBytes()); |
| } |
| |
| |
| String getData() { |
| return new String(buf); |
| } |
| |
| |
| void unread() { |
| if (pos > 0) { |
| pos--; |
| } |
| } |
| } |
| |
| |
| private static boolean identStart( final int ch ) { |
| return ch == 'T' || ch == 'L'; |
| } |
| |
| |
| private static void matchIdent( final MyByteArrayInputStream in, final StringBuilder 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)) { |
| final StringBuilder buf2 = new StringBuilder(); |
| 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; |
| } |
| final StringBuilder buf2 = new StringBuilder(); |
| 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 void matchGJIdent( final MyByteArrayInputStream in, final StringBuilder 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( final String s ) { |
| //System.out.println("Sig:" + s); |
| final StringBuilder buf = new StringBuilder(); |
| matchGJIdent(new MyByteArrayInputStream(s), buf); |
| return buf.toString(); |
| } |
| |
| |
| // @since 6.0 is no longer final |
| public static boolean isFormalParameterList( final String s ) { |
| return s.startsWith("<") && (s.indexOf(':') > 0); |
| } |
| |
| |
| // @since 6.0 is no longer final |
| public static boolean isActualParameterList( final String s ) { |
| return s.startsWith("L") && s.endsWith(">;"); |
| } |
| |
| |
| /** |
| * @return String representation |
| */ |
| @Override |
| public String toString() { |
| final String s = getSignature(); |
| return "Signature: " + s; |
| } |
| |
| |
| /** |
| * @return deep copy of this attribute |
| */ |
| @Override |
| public Attribute copy( final ConstantPool _constant_pool ) { |
| return (Attribute) clone(); |
| } |
| } |