gt:     access    = Utility.accessToString(access_flags);
context: /*
   * 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.generic;
  
  
  import com.sun.org.apache.bcel.internal.Constants;
  import com.sun.org.apache.bcel.internal.classfile.*;
  import java.util.ArrayList;
  import java.util.Iterator;
  
  /**
   * Template class for building up a field.  The only extraordinary thing
   * one can do is to add a constant value attribute to a field (which must of
   * course be compatible with to the declared type).
   *
   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
   * @see Field
   */
  public class FieldGen extends FieldGenOrMethodGen {
    private Object value = null;
  
    /**
     * Declare a field. If it is static (isStatic() == true) and has a
     * basic type like int or String it may have an initial value
     * associated with it as defined by setInitValue().
     *
     * @param access_flags access qualifiers
     * @param type  field type
     * @param name field name
     * @param cp constant pool
     */
    public FieldGen(int access_flags, Type type, String name, ConstantPoolGen cp) {
      setAccessFlags(access_flags);
      setType(type);
      setName(name);
      setConstantPool(cp);
    }
  
    /**
     * Instantiate from existing field.
     *
     * @param field Field object
     * @param cp constant pool (must contain the same entries as the field's constant pool)
     */
    public FieldGen(Field field, ConstantPoolGen cp) {
      this(field.getAccessFlags(), Type.getType(field.getSignature()), field.getName(), cp);
  
      Attribute[] attrs = field.getAttributes();
  
      for(int i=0; i < attrs.length; i++) {
        if(attrs[i] instanceof ConstantValue)
          setValue(((ConstantValue)attrs[i]).getConstantValueIndex());
        else
          addAttribute(attrs[i]);
      }
    }
  
    private void setValue(int index) {
      ConstantPool cp  = this.cp.getConstantPool();
      Constant     c   = cp.getConstant(index);
      value = ((ConstantObject)c).getConstantValue(cp);
    }
  
    /**
     * Set (optional) initial value of field, otherwise it will be set to null/0/false
     * by the JVM automatically.
     */
    public void setInitValue(String str) {
      checkType(new ObjectType("java.lang.String"));
  
      if(str != null)
        value = str;
    }
  
    public void setInitValue(long l) {
      checkType(Type.LONG);
  
      if(l != 0L)
        value = new Long(l);
    }
  
    public void setInitValue(int i) {
      checkType(Type.INT);
  
      if(i != 0)
        value = new Integer(i);
    }
  
    public void setInitValue(short s) {
      checkType(Type.SHORT);
  
      if(s != 0)
        value = new Integer(s);
    }
  
    public void setInitValue(char c) {
      checkType(Type.CHAR);
  
      if(c != 0)
        value = new Integer(c);
    }
  
    public void setInitValue(byte b) {
      checkType(Type.BYTE);
  
      if(b != 0)
        value = new Integer(b);
    }
  
    public void setInitValue(boolean b) {
      checkType(Type.BOOLEAN);
  
      if(b)
        value = new Integer(1);
    }
  
    public void setInitValue(float f) {
      checkType(Type.FLOAT);
  
      if(f != 0.0)
        value = new Float(f);
    }
  
    public void setInitValue(double d) {
      checkType(Type.DOUBLE);
  
      if(d != 0.0)
        value = new Double(d);
    }
  
    /** Remove any initial value.
     */
    public void cancelInitValue() {
      value = null;
    }
  
    private void checkType(Type atype) {
      if(type == null)
        throw new ClassGenException("You haven't defined the type of the field yet");
  
      if(!isFinal())
        throw new ClassGenException("Only final fields may have an initial value!");
  
      if(!type.equals(atype))
        throw new ClassGenException("Types are not compatible: " + type + " vs. " + atype);
    }
  
    /**
     * Get field object after having set up all necessary values.
     */
    public Field getField() {
      String      signature       = getSignature();
      int         name_index      = cp.addUtf8(name);
      int         signature_index = cp.addUtf8(signature);
  
      if(value != null) {
        checkType(type);
        int index = addConstant();
        addAttribute(new ConstantValue(cp.addUtf8("ConstantValue"),
                                       2, index, cp.getConstantPool()));
      }
  
      return new Field(access_flags, name_index, signature_index, getAttributes(),
                       cp.getConstantPool());
    }
  
    private int addConstant() {
      switch(type.getType()) {
      case Constants.T_INT: case Constants.T_CHAR: case Constants.T_BYTE:
      case Constants.T_BOOLEAN: case Constants.T_SHORT:
        return cp.addInteger(((Integer)value).intValue());
  
      case Constants.T_FLOAT:
        return cp.addFloat(((Float)value).floatValue());
  
      case Constants.T_DOUBLE:
        return cp.addDouble(((Double)value).doubleValue());
  
      case Constants.T_LONG:
        return cp.addLong(((Long)value).longValue());
  
      case Constants.T_REFERENCE:
        return cp.addString(((String)value));
  
      default:
        throw new RuntimeException("Oops: Unhandled : " + type.getType());
      }
    }
  
    public String  getSignature()  { return type.getSignature(); }
  
    private ArrayList observers;
  
    /** Add observer for this object.
     */
    public void addObserver(FieldObserver o) {
      if(observers == null)
        observers = new ArrayList();
  
      observers.add(o);
    }
  
    /** Remove observer for this object.
     */
    public void removeObserver(FieldObserver o) {
      if(observers != null)
        observers.remove(o);
    }
  
    /** Call notify() method on all observers. This method is not called
     * automatically whenever the state has changed, but has to be
     * called by the user after he has finished editing the object.
     */
    public void update() {
      if(observers != null)
        for(Iterator e = observers.iterator(); e.hasNext(); )
          ((FieldObserver)e.next()).notify(this);
    }
  
    public String getInitValue() {
      if(value != null) {
        return value.toString();
      } else
        return null;
    }
  
    /**
     * Return string representation close to declaration format,
     * `public static final short MAX = 100', e.g..
     *
     * @return String representation of field
     */
    public final String toString() {
      String name, signature, access; // Short cuts to constant pool
  
  