io.joshworks.snappy.loader.jar.JarEntry Maven / Gradle / Ivy

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/*
 * Copyright 2012-2015 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
 *
 *      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 io.joshworks.snappy.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 {

    private final JarEntryData source;

    private Certificate[] certificates;

    private CodeSigner[] codeSigners;

    public JarEntry(JarEntryData source) {
        super(source.getName().toString());
        this.source = source;
    }

    /**
     * Return the source {@link JarEntryData} that was used to create this entry.
     *
     * @return the source of the entry
     */
    public JarEntryData getSource() {
        return this.source;
    }

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

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

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

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

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

}