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/*
* 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.
*
* 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 javassist.ClassPool;
import javassist.bytecode.ConstPool;
import java.io.IOException;
import java.lang.reflect.Array;
import java.lang.reflect.Method;
/**
* Array member.
*
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @author Shigeru Chiba
*/
public class ArrayMemberValue extends MemberValue {
MemberValue type;
MemberValue[] values;
/**
* Constructs an array. The initial value or type are not specified.
*/
public ArrayMemberValue(ConstPool cp) {
super('[', cp);
type = null;
values = null;
}
/**
* Constructs an array. The initial value is not specified.
*
* @param t the type of the array elements.
*/
public ArrayMemberValue(MemberValue t, ConstPool cp) {
super('[', cp);
type = t;
values = null;
}
Object getValue(ClassLoader cl, ClassPool cp, Method method)
throws ClassNotFoundException
{
if (values == null)
throw new ClassNotFoundException(
"no array elements found: " + method.getName());
int size = values.length;
Class clazz;
if (type == null) {
clazz = method.getReturnType().getComponentType();
if (clazz == null || size > 0)
throw new ClassNotFoundException("broken array type: "
+ method.getName());
}
else
clazz = type.getType(cl);
Object a = Array.newInstance(clazz, size);
for (int i = 0; i < size; i++)
Array.set(a, i, values[i].getValue(cl, cp, method));
return a;
}
Class getType(ClassLoader cl) throws ClassNotFoundException {
if (type == null)
throw new ClassNotFoundException("no array type specified");
Object a = Array.newInstance(type.getType(cl), 0);
return a.getClass();
}
/**
* Obtains the type of the elements.
*
* @return null if the type is not specified.
*/
public MemberValue getType() {
return type;
}
/**
* Obtains the elements of the array.
*/
public MemberValue[] getValue() {
return values;
}
/**
* Sets the elements of the array.
*/
public void setValue(MemberValue[] elements) {
values = elements;
if (elements != null && elements.length > 0)
type = elements[0];
}
/**
* Obtains the string representation of this object.
*/
public String toString() {
StringBuffer buf = new StringBuffer("{");
if (values != null) {
for (int i = 0; i < values.length; i++) {
buf.append(values[i].toString());
if (i + 1 < values.length)
buf.append(", ");
}
}
buf.append("}");
return buf.toString();
}
/**
* Writes the value.
*/
public void write(AnnotationsWriter writer) throws IOException {
int num = values.length;
writer.arrayValue(num);
for (int i = 0; i < num; ++i)
values[i].write(writer);
}
/**
* Accepts a visitor.
*/
public void accept(MemberValueVisitor visitor) {
visitor.visitArrayMemberValue(this);
}
}
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