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      1 /*
      2  * Javassist, a Java-bytecode translator toolkit.
      3  * Copyright (C) 2004 Bill Burke. All Rights Reserved.
      4  *
      5  * The contents of this file are subject to the Mozilla Public License Version
      6  * 1.1 (the "License"); you may not use this file except in compliance with
      7  * the License.  Alternatively, the contents of this file may be used under
      8  * the terms of the GNU Lesser General Public License Version 2.1 or later.
      9  *
     10  * Software distributed under the License is distributed on an "AS IS" basis,
     11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
     12  * for the specific language governing rights and limitations under the
     13  * License.
     14  */
     15 
     16 package javassist.bytecode.annotation;
     17 
     18 import javassist.ClassPool;
     19 import javassist.bytecode.ConstPool;
     20 import java.io.IOException;
     21 import java.lang.reflect.Method;
     22 
     23 /**
     24  * Short integer constant value.
     25  *
     26  * @author <a href="mailto:bill (at) jboss.org">Bill Burke</a>
     27  * @author Shigeru Chiba
     28  */
     29 public class ShortMemberValue extends MemberValue {
     30     int valueIndex;
     31 
     32     /**
     33      * Constructs a short constant value.  The initial value is specified
     34      * by the constant pool entry at the given index.
     35      *
     36      * @param index     the index of a CONSTANT_Integer_info structure.
     37      */
     38     public ShortMemberValue(int index, ConstPool cp) {
     39         super('S', cp);
     40         this.valueIndex = index;
     41     }
     42 
     43     /**
     44      * Constructs a short constant value.
     45      *
     46      * @param s         the initial value.
     47      */
     48     public ShortMemberValue(short s, ConstPool cp) {
     49         super('S', cp);
     50         setValue(s);
     51     }
     52 
     53     /**
     54      * Constructs a short constant value.  The initial value is 0.
     55      */
     56     public ShortMemberValue(ConstPool cp) {
     57         super('S', cp);
     58         setValue((short)0);
     59     }
     60 
     61     Object getValue(ClassLoader cl, ClassPool cp, Method m) {
     62         return new Short(getValue());
     63     }
     64 
     65     Class getType(ClassLoader cl) {
     66         return short.class;
     67     }
     68 
     69     /**
     70      * Obtains the value of the member.
     71      */
     72     public short getValue() {
     73         return (short)cp.getIntegerInfo(valueIndex);
     74     }
     75 
     76     /**
     77      * Sets the value of the member.
     78      */
     79     public void setValue(short newValue) {
     80         valueIndex = cp.addIntegerInfo(newValue);
     81     }
     82 
     83     /**
     84      * Obtains the string representation of this object.
     85      */
     86     public String toString() {
     87         return Short.toString(getValue());
     88     }
     89 
     90     /**
     91      * Writes the value.
     92      */
     93     public void write(AnnotationsWriter writer) throws IOException {
     94         writer.constValueIndex(getValue());
     95     }
     96 
     97     /**
     98      * Accepts a visitor.
     99      */
    100     public void accept(MemberValueVisitor visitor) {
    101         visitor.visitShortMemberValue(this);
    102     }
    103 }
    104