com.github.trohovsky.just.visitor.ClassDependenciesVisitor.java Source code

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Here is the source code for com.github.trohovsky.just.visitor.ClassDependenciesVisitor.java

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/*
 * Copyright 2014 Tomas Rohovsky
 *
 * 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 com.github.trohovsky.just.visitor;

import java.util.Set;

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.TypePath;
import org.objectweb.asm.signature.SignatureVisitor;

import com.github.trohovsky.just.model.Dependencies;

/**
 * Visitor for collecting of class dependencies.
 * 
 * @author Tomas Rohovsky
 */
public class ClassDependenciesVisitor extends ClassVisitor {

    private final Dependencies dependencies;
    private final AnnotationVisitor annotationVisitor;
    private final SignatureVisitor signatureVisitor;
    private final FieldVisitor fieldVisitor;
    private final MethodVisitor methodVisitor;

    public ClassDependenciesVisitor(final Dependencies dependencies, final AnnotationVisitor annotationVisitor,
            final SignatureVisitor signatureVisitor, final FieldVisitor fieldVisitor,
            final MethodVisitor methodVisitor) {
        super(Opcodes.ASM5);
        this.dependencies = dependencies;
        this.annotationVisitor = annotationVisitor;
        this.signatureVisitor = signatureVisitor;
        this.fieldVisitor = fieldVisitor;
        this.methodVisitor = methodVisitor;
    }

    @Override
    public void visit(int version, int access, String name, String signature, String superName,
            String[] interfaces) {
        if (signature == null) {
            dependencies.addInternalName(superName);
            dependencies.addInternalNames(interfaces);
        } else {
            dependencies.addSignature(signature, signatureVisitor);
        }
    }

    @Override
    public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
        dependencies.addDesc(desc);
        return annotationVisitor;
    }

    // Java 8 - JSR 308: Annotations on Java Types
    @Override
    public AnnotationVisitor visitTypeAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) {
        dependencies.addDesc(desc);
        return annotationVisitor;
    }

    @Override
    public FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
        if (signature == null) {
            dependencies.addDesc(desc);
        } else {
            dependencies.addTypeSignature(signature, signatureVisitor);
        }
        if (value instanceof Type) {
            dependencies.addType((Type) value);
        }
        return fieldVisitor;
    }

    @Override
    public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
        if (signature == null) {
            dependencies.addMethodDesc(desc);
        } else {
            dependencies.addSignature(signature, signatureVisitor);
        }
        dependencies.addInternalNames(exceptions);
        return methodVisitor;
    }

    public Set<String> getClasses() {
        return dependencies.get();
    }

}