org.jboss.modules.JarEntryResource Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 org.jboss.modules;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;
/**
* @author David M. Lloyd
* @author Richard Opalka
*/
final class JarEntryResource implements Resource {
private final JarFile jarFile;
private final String relativePath;
private final String entryName;
private final URL resourceURL;
JarEntryResource(final JarFile jarFile, final String name, final String relativePath, final URL resourceURL) {
this.jarFile = jarFile;
this.relativePath = relativePath;
this.entryName = relativePath == null ? name : name.substring(relativePath.length() + 1);
this.resourceURL = resourceURL;
}
public String getName() {
return entryName;
}
public URL getURL() {
return resourceURL;
}
public InputStream openStream() throws IOException {
return jarFile.getInputStream(getEntry());
}
public long getSize() {
final long size = getEntry().getSize();
return size == -1 ? 0 : size;
}
private ZipEntry getEntry() {
final String relativePath = this.relativePath;
return relativePath == null ? jarFile.getEntry(entryName) : jarFile.getEntry(relativePath + "/" + entryName);
}
}