org.springframework.boot.loader.tools.TestJarFile.java Source code

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Here is the source code for org.springframework.boot.loader.tools.TestJarFile.java

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/*
 * Copyright 2012-2019 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.boot.loader.tools;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import java.util.jar.JarFile;
import java.util.jar.Manifest;

import org.zeroturnaround.zip.FileSource;
import org.zeroturnaround.zip.ZipEntrySource;
import org.zeroturnaround.zip.ZipUtil;

/**
 * @author Phillip Webb
 * @author Andy Wilkinson
 */
public class TestJarFile {

    private final byte[] buffer = new byte[4096];

    private final File temporaryFolder;

    private final File jarSource;

    private final List<ZipEntrySource> entries = new ArrayList<>();

    public TestJarFile(File temporaryFolder) throws IOException {
        this.temporaryFolder = temporaryFolder;
        this.jarSource = new File(temporaryFolder, "jar-source");
    }

    public void addClass(String filename, Class<?> classToCopy) throws IOException {
        addClass(filename, classToCopy, null);
    }

    public void addClass(String filename, Class<?> classToCopy, Long time) throws IOException {
        File file = getFilePath(filename);
        file.getParentFile().mkdirs();
        InputStream inputStream = getClass()
                .getResourceAsStream("/" + classToCopy.getName().replace('.', '/') + ".class");
        copyToFile(inputStream, file);
        if (time != null) {
            file.setLastModified(time);
        }
        this.entries.add(new FileSource(filename, file));
    }

    public void addFile(String filename, File fileToCopy) throws IOException {
        File file = getFilePath(filename);
        file.getParentFile().mkdirs();
        try (InputStream inputStream = new FileInputStream(fileToCopy)) {
            copyToFile(inputStream, file);
        }
        this.entries.add(new FileSource(filename, file));
    }

    public void addManifest(Manifest manifest) throws IOException {
        File manifestFile = new File(this.jarSource, "META-INF/MANIFEST.MF");
        manifestFile.getParentFile().mkdirs();
        try (OutputStream outputStream = new FileOutputStream(manifestFile)) {
            manifest.write(outputStream);
        }
        this.entries.add(new FileSource("META-INF/MANIFEST.MF", manifestFile));
    }

    private File getFilePath(String filename) {
        String[] paths = filename.split("\\/");
        File file = this.jarSource;
        for (String path : paths) {
            file = new File(file, path);
        }
        return file;
    }

    private void copyToFile(InputStream inputStream, File file) throws IOException {
        try (OutputStream outputStream = new FileOutputStream(file)) {
            copy(inputStream, outputStream);
        }
    }

    private void copy(InputStream in, OutputStream out) throws IOException {
        int bytesRead;
        while ((bytesRead = in.read(this.buffer)) != -1) {
            out.write(this.buffer, 0, bytesRead);
        }
    }

    public JarFile getJarFile() throws IOException {
        return new JarFile(getFile());
    }

    public File getJarSource() {
        return this.jarSource;
    }

    public File getFile() throws IOException {
        return getFile("jar");
    }

    public File getFile(String extension) throws IOException {
        File file = new File(this.temporaryFolder, UUID.randomUUID() + "." + extension);
        ZipUtil.pack(this.entries.toArray(new ZipEntrySource[0]), file);
        return file;
    }

}