net.signbit.tools.atomizer.DumpClassReferences.java Source code

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Here is the source code for net.signbit.tools.atomizer.DumpClassReferences.java

Source

/*
 * Copyright 2017 Florin Iucha <florin@signbit.net>
 *
 * 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 net.signbit.tools.atomizer;

import org.objectweb.asm.ClassReader;

import org.objectweb.asm.Type;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.LocalVariableNode;
import org.objectweb.asm.tree.MethodNode;

import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class DumpClassReferences {

    public static void main(String[] args) throws IOException {
        ZipFile zipFile = new ZipFile(args[0]);

        long startTimeMillis = System.currentTimeMillis();
        Enumeration<? extends ZipEntry> en = zipFile.entries();
        while (en.hasMoreElements()) {
            ZipEntry e = en.nextElement();
            String name = e.getName();
            if (name.endsWith(".class")) {
                InputStream stream = zipFile.getInputStream(e);
                processClass(stream);
            }
        }
        long endTimeMillis = System.currentTimeMillis();
    }

    private static void processClass(InputStream stream) throws IOException {
        ClassReader reader = new ClassReader(stream);
        ClassNode classNode = new ClassNode();
        reader.accept(classNode, 0);

        System.out.println("Class: " + classNode.name);
        System.out.println("   Extends: " + classNode.superName);

        for (Object itf : classNode.interfaces) {
            System.out.println("   Implements: " + itf);
        }

        for (Object mn : classNode.methods) {
            MethodNode methodNode = (MethodNode) mn;
            System.out.println("   Method: " + methodNode.name);

            Type type = Type.getType(methodNode.desc);
            System.out.println("      Return: " + type.getReturnType().getClassName());
            for (Type argType : type.getArgumentTypes()) {
                System.out.println("      Param: " + argType.getClassName());
            }

            for (Object oo : methodNode.exceptions) {
                System.out.println("      Throws: " + oo);
            }

            for (Object lon : methodNode.localVariables) {
                LocalVariableNode localVariableNode = (LocalVariableNode) lon;
                System.out.println("      Var: " + Type.getType(localVariableNode.desc).getClassName());
            }
        }

    }
}