content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  package jaxp.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 jaxp.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.
   *
   * @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
     * @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();
    }
  }
  