ceylon.modules.jboss.repository.CarEntryResource Maven / Gradle / Ivy

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/*
 * Copyright 2011 Red Hat inc. and third party contributors as noted 
 * 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 ceylon.modules.jboss.repository;

import org.jboss.modules.Resource;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

/**
 * Car archive entry.
 *
 * @author David M. Lloyd
 * @author Ales Justin
 */
final class CarEntryResource implements Resource {
    private final JarFile jarFile;
    private final JarEntry entry;
    private final URL resourceURL;

    CarEntryResource(final JarFile jarFile, final JarEntry entry, final URL resourceURL) {
        this.jarFile = jarFile;
        this.entry = entry;
        this.resourceURL = resourceURL;
    }

    public String getName() {
        return entry.getName();
    }

    public URL getURL() {
        return resourceURL;
    }

    public InputStream openStream() throws IOException {
        return jarFile.getInputStream(entry);
    }

    public long getSize() {
        final long size = entry.getSize();
        return size == -1 ? 0 : size;
    }
}