com.google.gwt.dev.resource.impl.ZipFileResource.java Source code

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Here is the source code for com.google.gwt.dev.resource.impl.ZipFileResource.java

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/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * 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.google.gwt.dev.resource.impl;

import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;

import org.apache.commons.lang.StringUtils;

/**
 * Represents a resource contained in a jar or zip file.
 */
public class ZipFileResource extends AbstractResource {

    private final ZipFileClassPathEntry classPathEntry;
    private final String path;
    // >>> Instantiations
    private final String[] pathParts;
    // <<< Instantiations

    public ZipFileResource(ZipFileClassPathEntry classPathEntry, String path) {
        this.classPathEntry = classPathEntry;
        this.path = path;
        // >>> Instantiations
        this.pathParts = StringUtils.split(path, '/');
        // <<< Instantiations
    }

    @Override
    public ZipFileClassPathEntry getClassPathEntry() {
        return classPathEntry;
    }

    @Override
    public long getLastModified() {
        // XXX < Instantiations
        ZipEntry entry = getEntry();
        if (entry == null) {
            return -1;
        }
        // XXX > Instantiations
        return entry.getTime();
    }

    @Override
    public String getLocation() {
        // CHECKSTYLE_OFF
        String proto = classPathEntry.getZipFile() instanceof JarFile ? "jar:" : "zip:";
        // CHECKSTYLE_ON
        return proto + classPathEntry.getLocation() + "!/" + path;
    }

    @Override
    public String getPath() {
        return path;
    }

    // XXX < Instantiations
    public String[] getPathParts() {
        return pathParts;
    }

    // XXX > Instantiations
    /**
     * Since we don't dynamically reload zips during a run, zip-based resources
     * cannot become stale.
     */
    @Override
    public boolean isStale() {
        return false;
    }

    @Override
    public InputStream openContents() {
        try {
            return classPathEntry.getZipFile().getInputStream(getEntry());
        } catch (IOException e) {
            // The spec for this method says it can return null.
            return null;
        }
    }

    @Override
    public boolean wasRerooted() {
        return false;
    }

    private ZipEntry getEntry() {
        return classPathEntry.getZipFile().getEntry(path);
    }
}