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/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2011 INRIA, France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package scala.tools.asm.util;
import scala.tools.asm.AnnotationVisitor;
import scala.tools.asm.Opcodes;
import scala.tools.asm.Type;
/**
* An {@link AnnotationVisitor} that checks that its methods are properly used.
*
* @author Eric Bruneton
*/
public class CheckAnnotationAdapter extends AnnotationVisitor {
private final boolean named;
private boolean end;
public CheckAnnotationAdapter(final AnnotationVisitor av) {
this(av, true);
}
CheckAnnotationAdapter(final AnnotationVisitor av, final boolean named) {
super(Opcodes.ASM4, av);
this.named = named;
}
@Override
public void visit(final String name, final Object value) {
checkEnd();
checkName(name);
if (!(value instanceof Byte || value instanceof Boolean
|| value instanceof Character || value instanceof Short
|| value instanceof Integer || value instanceof Long
|| value instanceof Float || value instanceof Double
|| value instanceof String || value instanceof Type
|| value instanceof byte[] || value instanceof boolean[]
|| value instanceof char[] || value instanceof short[]
|| value instanceof int[] || value instanceof long[]
|| value instanceof float[] || value instanceof double[]))
{
throw new IllegalArgumentException("Invalid annotation value");
}
if (value instanceof Type) {
int sort = ((Type) value).getSort();
if (sort != Type.OBJECT && sort != Type.ARRAY) {
throw new IllegalArgumentException("Invalid annotation value");
}
}
if (av != null) {
av.visit(name, value);
}
}
@Override
public void visitEnum(
final String name,
final String desc,
final String value)
{
checkEnd();
checkName(name);
CheckMethodAdapter.checkDesc(desc, false);
if (value == null) {
throw new IllegalArgumentException("Invalid enum value");
}
if (av != null) {
av.visitEnum(name, desc, value);
}
}
@Override
public AnnotationVisitor visitAnnotation(
final String name,
final String desc)
{
checkEnd();
checkName(name);
CheckMethodAdapter.checkDesc(desc, false);
return new CheckAnnotationAdapter(av == null
? null
: av.visitAnnotation(name, desc));
}
@Override
public AnnotationVisitor visitArray(final String name) {
checkEnd();
checkName(name);
return new CheckAnnotationAdapter(av == null
? null
: av.visitArray(name), false);
}
@Override
public void visitEnd() {
checkEnd();
end = true;
if (av != null) {
av.visitEnd();
}
}
private void checkEnd() {
if (end) {
throw new IllegalStateException("Cannot call a visit method after visitEnd has been called");
}
}
private void checkName(final String name) {
if (named && name == null) {
throw new IllegalArgumentException("Annotation value name must not be null");
}
}
}
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