
org.osjava.jardiff.ClassInfoVisitor Maven / Gradle / Ivy
/**
* Copyright 2012-2014 Julien Eluard and contributors
* This project includes software developed by Julien Eluard: https://github.com/jeluard/
*
* Licensed 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.
*/
package org.osjava.jardiff;
import java.util.HashMap;
import java.util.Map;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.commons.EmptyVisitor;
/**
* A reusable class which uses the ASM to build up ClassInfo about a
* java class file.
*
* @author Antony Riley
*/
public class ClassInfoVisitor extends EmptyVisitor
{
/**
* The class file version.
*/
private int version;
/**
* The access flags for the class.
*/
private int access;
/**
* The internal name of the class.
*/
private String name;
/**
* The signature of the class
*/
private String signature;
/**
* The internal name of the superclass.
*/
private String supername;
/**
* An array of internal names of interfaces implemented by this class.
*/
private String[] interfaces;
/**
* A map of method signature to a MethodInfo describing the method.
*/
private Map methodMap;
/**
* A map of field signature to a FieldInfo describing the field.
*/
private Map fieldMap;
/**
* Reset this ClassInfoVisitor so that it can be used to visit another
* class.
*/
public void reset() {
methodMap = new HashMap();
fieldMap = new HashMap();
}
/**
* The the classInfo this ClassInfoVisitor has built up about a class
*/
public ClassInfo getClassInfo() {
return new ClassInfo(version, access, name, signature, supername,
interfaces, methodMap, fieldMap);
}
/**
* Receive notification of information about a class from ASM.
*
* @param version the class file version number.
* @param access the access flags for the class.
* @param name the internal name of the class.
* @param signature the signature of the class.
* @param supername the internal name of the super class.
* @param interfaces the internal names of interfaces implemented.
*/
public void visit(int version, int access, String name, String signature,
String supername, String[] interfaces) {
this.version = version;
this.access = access;
this.name = name;
this.signature = signature;
this.supername = supername;
this.interfaces = interfaces;
}
public MethodVisitor visitMethod(int access, String name, String desc,
String signature, String[] exceptions) {
methodMap.put(name + desc, new MethodInfo(access, name, desc,
signature, exceptions));
return null;
}
public FieldVisitor visitField(int access, String name, String desc,
String signature, Object value) {
fieldMap.put(name,
new FieldInfo(access, name, desc, signature, value));
return this;
}
}
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