com.alipay.sofa.ark.loader.jar.JarEntry Maven / Gradle / Ivy

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.alipay.sofa.ark.loader.jar;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.CodeSigner;
import java.security.cert.Certificate;
import java.util.jar.Attributes;
import java.util.jar.Manifest;

/**
 * Extended variant of {@link java.util.jar.JarEntry} returned by {@link JarFile}s.
 *
 * @author Phillip Webb
 */
public class JarEntry extends java.util.jar.JarEntry implements FileHeader {

    private Certificate[] certificates;

    private CodeSigner[]  codeSigners;

    private final JarFile jarFile;

    private long          localHeaderOffset;

    JarEntry(JarFile jarFile, CentralDirectoryFileHeader header) {
        super(header.getName().toString());
        this.jarFile = jarFile;
        this.localHeaderOffset = header.getLocalHeaderOffset();
        setCompressedSize(header.getCompressedSize());
        setMethod(header.getMethod());
        setCrc(header.getCrc());
        setSize(header.getSize());
        setExtra(header.getExtra());
        setComment(header.getComment().toString());
        setSize(header.getSize());
        setTime(header.getTime());
    }

    @Override
    public boolean hasName(String name, String suffix) {
        return getName().length() == name.length() + suffix.length() && getName().startsWith(name)
               && getName().endsWith(suffix);
    }

    /**
     * Return a {@link URL} for this {@link JarEntry}.
     * @return the URL for the entry
     * @throws MalformedURLException if the URL is not valid
     */
    URL getUrl() throws MalformedURLException {
        return new URL(this.jarFile.getUrl(), getName());
    }

    @Override
    public Attributes getAttributes() throws IOException {
        Manifest manifest = this.jarFile.getManifest();
        return (manifest == null ? null : manifest.getAttributes(getName()));
    }

    @Override
    public Certificate[] getCertificates() {
        if (this.jarFile.isSigned() && this.certificates == null) {
            this.jarFile.setupEntryCertificates(this);
        }
        return this.certificates;
    }

    @Override
    public CodeSigner[] getCodeSigners() {
        if (this.jarFile.isSigned() && this.codeSigners == null) {
            this.jarFile.setupEntryCertificates(this);
        }
        return this.codeSigners;
    }

    void setCertificates(java.util.jar.JarEntry entry) {
        this.certificates = entry.getCertificates();
        this.codeSigners = entry.getCodeSigners();
    }

    @Override
    public long getLocalHeaderOffset() {
        return this.localHeaderOffset;
    }

}