/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 2004 Bill Burke. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later,
* or the Apache License Version 2.0.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist.bytecode.annotation;
import java.io.
IOException;
import java.lang.reflect.
Method;
import javassist.
ClassPool;
import javassist.bytecode.
ConstPool;
import javassist.bytecode.
Descriptor;
/**
* Enum constant value.
*
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @author Shigeru Chiba
*/
public class
EnumMemberValue extends
MemberValue {
int
typeIndex,
valueIndex;
/**
* Constructs an enum constant value. The initial value is specified
* by the constant pool entries at the given indexes.
*
* @param type the index of a CONSTANT_Utf8_info structure
* representing the enum type.
* @param value the index of a CONSTANT_Utf8_info structure.
* representing the enum value.
*/
public
EnumMemberValue(int
type, int
value,
ConstPool cp) {
super('e',
cp);
this.
typeIndex =
type;
this.
valueIndex =
value;
}
/**
* Constructs an enum constant value.
* The initial value is not specified.
*/
public
EnumMemberValue(
ConstPool cp) {
super('e',
cp);
typeIndex =
valueIndex = 0;
}
Object getValue(
ClassLoader cl,
ClassPool cp,
Method m)
throws
ClassNotFoundException
{
try {
return
getType(
cl).
getField(
getValue()).
get(null);
}
catch (
NoSuchFieldException e) {
throw new
ClassNotFoundException(
getType() + "." +
getValue());
}
catch (
IllegalAccessException e) {
throw new
ClassNotFoundException(
getType() + "." +
getValue());
}
}
Class getType(
ClassLoader cl) throws
ClassNotFoundException {
return
loadClass(
cl,
getType());
}
/**
* Obtains the enum type name.
*
* @return a fully-qualified type name.
*/
public
String getType() {
return
Descriptor.
toClassName(
cp.
getUtf8Info(
typeIndex));
}
/**
* Changes the enum type name.
*
* @param typename a fully-qualified type name.
*/
public void
setType(
String typename) {
typeIndex =
cp.
addUtf8Info(
Descriptor.
of(
typename));
}
/**
* Obtains the name of the enum constant value.
*/
public
String getValue() {
return
cp.
getUtf8Info(
valueIndex);
}
/**
* Changes the name of the enum constant value.
*/
public void
setValue(
String name) {
valueIndex =
cp.
addUtf8Info(
name);
}
public
String toString() {
return
getType() + "." +
getValue();
}
/**
* Writes the value.
*/
public void
write(
AnnotationsWriter writer) throws
IOException {
writer.
enumConstValue(
cp.
getUtf8Info(
typeIndex),
getValue());
}
/**
* Accepts a visitor.
*/
public void
accept(
MemberValueVisitor visitor) {
visitor.
visitEnumMemberValue(this);
}
}