~repos /gdx-studio

/*
 * 03/21/2010
 *
 * Copyright (C) 2010 Robert Futrell
 * robert_futrell at users.sourceforge.net
 * http://fifesoft.com/rsyntaxtextarea
 *
 * This library is distributed under a modified BSD license.  See the included
 * RSTALanguageSupport.License.txt file for details.
 */
package org.fife.rsta.ac.java.classreader.attributes;

import org.fife.rsta.ac.java.classreader.*;
import org.fife.rsta.ac.java.classreader.constantpool.*;


/**
 * Implementation of the "<code>Exceptions</code>" attribute found in
 * {@link MethodInfo}s.
 *
 * @author Robert Futrell
 * @version 1.0
 */
public class Exceptions extends AttributeInfo {

  /**
   * The method this attribute is describing.
   */
  private MethodInfo mi;

  /**
   * Indices into the constant pool of {@link ConstantClassInfo}s, each
   * representing a class type that this method is declared to throw.
   */
  private int[] exceptionIndexTable;


  /**
   * Constructor.
   *
   * @param mi The method this attribute is describing.
   */
  public Exceptions(MethodInfo mi, int[] exceptionIndexTable) {
    super(mi.getClassFile());
    this.exceptionIndexTable = exceptionIndexTable;
  }


  /**
   * Returns the fully-qualified name of the specified exception.
   *
   * @param index The index of the exception whose name to retrieve.
   * @return The name of the exception.
   */
  public String getException(int index) {
    ClassFile cf = getClassFile();
    ConstantPoolInfo cpi = cf.getConstantPoolInfo(
                    exceptionIndexTable[index]);
    ConstantClassInfo cci = (ConstantClassInfo)cpi;
    int nameIndex = cci.getNameIndex();
    String name = cf.getUtf8ValueFromConstantPool(nameIndex);
    return name.replace('/', '.');
  }


  /**
   * Returns the number of exceptions this attribute knows about.
   *
   * @return The number of exceptions.
   */
  public int getExceptionCount() {
    return exceptionIndexTable==null ? 0 : exceptionIndexTable.length;
  }


  /**
   * Returns information about the method this attribute is describing.
   *
   * @return The method information.
   */
  public MethodInfo getMethodInfo() {
    return mi;
  }


}