cuchaz.enigma.analysis.ParsedJar.java Source code

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Here is the source code for cuchaz.enigma.analysis.ParsedJar.java

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/*******************************************************************************
 * Copyright (c) 2015 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public
 * License v3.0 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 * <p>
 * Contributors:
 * Jeff Martin - initial API and implementation
 ******************************************************************************/

package cuchaz.enigma.analysis;

import cuchaz.enigma.mapping.entry.ClassEntry;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.tree.ClassNode;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import java.util.function.Consumer;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.JarInputStream;

public class ParsedJar {
    private final Map<String, ClassNode> nodes = new LinkedHashMap<>();

    public ParsedJar(JarFile jar) throws IOException {
        try {
            // get the jar entries that correspond to classes
            Enumeration<JarEntry> entries = jar.entries();
            while (entries.hasMoreElements()) {
                JarEntry entry = entries.nextElement();
                // is this a class file?
                if (entry.getName().endsWith(".class")) {
                    try (InputStream input = new BufferedInputStream(jar.getInputStream(entry))) {
                        // read the ClassNode from the jar
                        ClassReader reader = new ClassReader(input);
                        ClassNode node = new ClassNode();
                        reader.accept(node, 0);
                        String path = entry.getName().substring(0, entry.getName().length() - ".class".length());
                        nodes.put(path, node);
                    }
                }
            }
        } finally {
            jar.close();
        }
    }

    public ParsedJar(JarInputStream jar) throws IOException {
        try {
            // get the jar entries that correspond to classes
            JarEntry entry;
            while ((entry = jar.getNextJarEntry()) != null) {
                // is this a class file?
                if (entry.getName().endsWith(".class")) {
                    // read the ClassNode from the jar
                    ClassReader reader = new ClassReader(jar);
                    ClassNode node = new ClassNode();
                    reader.accept(node, 0);
                    String path = entry.getName().substring(0, entry.getName().length() - ".class".length());
                    nodes.put(path, node);
                    jar.closeEntry();
                }
            }
        } finally {
            jar.close();
        }
    }

    public void visit(Consumer<ClassNode> visitor) {
        for (ClassNode node : nodes.values()) {
            visitor.accept(node);
        }
    }

    public int getClassCount() {
        return nodes.size();
    }

    public List<ClassEntry> getClassEntries() {
        List<ClassEntry> entries = new ArrayList<>(nodes.size());
        for (ClassNode node : nodes.values()) {
            entries.add(new ClassEntry(node.name));
        }
        return entries;
    }

    public ClassNode getClassNode(String name) {
        return nodes.get(name);
    }
}