package org.apache.maven.shared.dependency.analyzer.asm;
/*
* 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.
*/
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.signature.SignatureReader;
import org.objectweb.asm.signature.SignatureVisitor;
/**
* Computes the set of classes referenced by visited code.
* Inspired by <code>org.objectweb.asm.depend.DependencyVisitor</code> in the ASM dependencies example.
*
* @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>
* @version $Id$
*/
public class DefaultClassVisitor
extends ClassVisitor
{
// fields -----------------------------------------------------------------
private final ResultCollector resultCollector;
private final SignatureVisitor signatureVisitor;
private final AnnotationVisitor annotationVisitor;
private final FieldVisitor fieldVisitor;
private final MethodVisitor methodVisitor;
// constructors -----------------------------------------------------------
public DefaultClassVisitor( SignatureVisitor signatureVisitor, AnnotationVisitor annotationVisitor,
FieldVisitor fieldVisitor, MethodVisitor methodVisitor,
ResultCollector resultCollector )
{
super( Opcodes.ASM5 );
this.signatureVisitor = signatureVisitor;
this.annotationVisitor = annotationVisitor;
this.fieldVisitor = fieldVisitor;
this.methodVisitor = methodVisitor;
this.resultCollector = resultCollector;
}
public void visit( final int version, final int access, final String name, final String signature,
final String superName, final String[] interfaces )
{
if ( signature == null )
{
resultCollector.addName( superName );
resultCollector.addNames( interfaces );
}
else
{
addSignature( signature );
}
}
public AnnotationVisitor visitAnnotation( final String desc, final boolean visible )
{
resultCollector.addDesc( desc );
return annotationVisitor;
}
public FieldVisitor visitField( final int access, final String name, final String desc, final String signature,
final Object value )
{
if ( signature == null )
{
resultCollector.addDesc( desc );
}
else
{
addTypeSignature( signature );
}
if ( value instanceof Type )
{
resultCollector.addType( (Type) value );
}
return fieldVisitor;
}
public MethodVisitor visitMethod( final int access, final String name, final String desc, final String signature,
final String[] exceptions )
{
if ( signature == null )
{
resultCollector.addMethodDesc( desc );
}
else
{
addSignature( signature );
}
resultCollector.addNames( exceptions );
return methodVisitor;
}
// private methods --------------------------------------------------------
private void addSignature( final String signature )
{
if ( signature != null )
{
new SignatureReader( signature ).accept( signatureVisitor );
}
}
private void addTypeSignature( final String signature )
{
if ( signature != null )
{
new SignatureReader( signature ).acceptType( signatureVisitor );
}
}
}