net.hasor.cobble.loader.jar.JarFileWrapper Maven / Gradle / Ivy

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/*
 * Copyright 2012-2020 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 net.hasor.cobble.loader.jar;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.Permission;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.Manifest;
import java.util.stream.Stream;
import java.util.zip.ZipEntry;

/**
 * A wrapper used to create a copy of a {@link JarFile} so that it can be safely closed
 * without closing the original.
 *
 * @author Phillip Webb
 */
class JarFileWrapper extends AbstractJarFile {
    private final JarFile parent;

    JarFileWrapper(JarFile parent) throws IOException {
        super(parent.getRootJarFile().getFile());
        this.parent = parent;
        super.close();
    }

    @Override
    URL getUrl() throws MalformedURLException {
        return this.parent.getUrl();
    }

    @Override
    JarFileType getType() {
        return this.parent.getType();
    }

    @Override
    Permission getPermission() {
        return this.parent.getPermission();
    }

    @Override
    public Manifest getManifest() throws IOException {
        return this.parent.getManifest();
    }

    @Override
    public Enumeration entries() {
        return this.parent.entries();
    }

    @Override
    public Stream stream() {
        return this.parent.stream();
    }

    @Override
    public JarEntry getJarEntry(String name) {
        return this.parent.getJarEntry(name);
    }

    @Override
    public ZipEntry getEntry(String name) {
        return this.parent.getEntry(name);
    }

    @Override
    InputStream getInputStream() throws IOException {
        return this.parent.getInputStream();
    }

    @Override
    public synchronized InputStream getInputStream(ZipEntry ze) throws IOException {
        return this.parent.getInputStream(ze);
    }

    @Override
    public String getComment() {
        return this.parent.getComment();
    }

    @Override
    public int size() {
        return this.parent.size();
    }

    @Override
    public String toString() {
        return this.parent.toString();
    }

    @Override
    public String getName() {
        return this.parent.getName();
    }

    static JarFile unwrap(java.util.jar.JarFile jarFile) {
        if (jarFile instanceof JarFile) {
            return (JarFile) jarFile;
        }
        if (jarFile instanceof JarFileWrapper) {
            return unwrap(((JarFileWrapper) jarFile).parent);
        }
        throw new IllegalStateException("Not a JarFile or Wrapper");
    }
}