/*

  *  Copyright (c) 2001-2009, Jean Tessier

  *  All rights reserved.

  *  

  *  Redistribution and use in source and binary forms, with or without

  *  modification, are permitted provided that the following conditions

  *  are met:

  *  

  *      * Redistributions of source code must retain the above copyright

  *        notice, this list of conditions and the following disclaimer.

  *  

  *      * 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.

  *  

  *      * Neither the name of Jean Tessier nor the names of his contributors

  *        may be used to endorse or promote products derived from this software

  *        without specific prior written permission.

  *  

  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

  *  "AS IS" AND ANY EXPRESS 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 REGENTS OR

  *  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.

  */

 package com.jeantessier.classreader.impl;

 import java.io.*;

 import java.util.*;

 import org.apache.log4j.*;

 import com.jeantessier.classreader.*;

 public class ConstantPool extends ArrayList<com.jeantessier.classreader.ConstantPoolEntry> implements com.jeantessier.classreader.ConstantPool {

     private Classfile classfile;

     public ConstantPool(Classfile classfile, DataInput in) throws IOException {

         this.classfile = classfile;

         int count = in.readUnsignedShort();

         ensureCapacity(count);

         // Entry 0 is null

         add(null);

         for (int i=1; i<count; i++) {

             byte tag = in.readByte();

             switch(tag) {

                 case ConstantPoolEntry.CONSTANT_Class:

                     add(new Class_info(this, in));

                     break;

                 case ConstantPoolEntry.CONSTANT_Fieldref:

                     add(new FieldRef_info(this, in));

                     break;

                 case ConstantPoolEntry.CONSTANT_Methodref:

                     add(new MethodRef_info(this, in));

                     break;

                 case ConstantPoolEntry.CONSTANT_InterfaceMethodref:

                     add(new InterfaceMethodRef_info(this, in));

                     break;

                 case ConstantPoolEntry.CONSTANT_String:

                     add(new String_info(this, in));

                     break;

                 case ConstantPoolEntry.CONSTANT_Integer:

                     add(new Integer_info(this, in));

                     break;

                 case ConstantPoolEntry.CONSTANT_Float:

                     add(new Float_info(this, in));

                     break;

                 case ConstantPoolEntry.CONSTANT_Long:

                     add(new Long_info(this, in));

                     i++;

                     add(null);

                     break;

                 case ConstantPoolEntry.CONSTANT_Double:

                     add(new Double_info(this, in));

                     i++;

                     add(null);

                     break;

                 case ConstantPoolEntry.CONSTANT_NameAndType:

                     add(new NameAndType_info(this, in));

                     break;

                 case ConstantPoolEntry.CONSTANT_Utf8:

                     add(new UTF8_info(this, in));

                     break;

                 default:

                     Logger.getLogger(getClass()).info("Unknown Tag " + tag);

                     break;

             }

         }

     }

     public Classfile getClassfile() {

         return classfile;

     }

     public void accept(Visitor visitor) {

         visitor.visitConstantPool(this);

     }

     public String toString() {

         StringWriter out = new StringWriter();

         PrintWriter writer = new PrintWriter(out);

         writer.println("Constant Pool:");

         Printer printer = new TextPrinter(writer);

         accept(printer);

         writer.close();

         return out.toString();

     }

 }