us.terebi.lang.lpc.io.ByteArrayResource.java Source code

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Here is the source code for us.terebi.lang.lpc.io.ByteArrayResource.java

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/* ------------------------------------------------------------------------
 * $Id$
 * Copyright 2009 Tim Vernum
 * ------------------------------------------------------------------------
 * 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 us.terebi.lang.lpc.io;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.io.FilenameUtils;

/**
 * 
 */
public class ByteArrayResource implements Resource {
    private static final Resource[] NO_CHILDREN = new Resource[0];

    private final byte[] _bytes;
    private final String _name;

    public ByteArrayResource(String name, byte[] bytes) {
        _name = name;
        _bytes = bytes;
    }

    public Resource getChild(String name) {
        return new NoSuchResource(this, name);
    }

    public Resource[] getChildren() {
        return NO_CHILDREN;
    }

    public String getName() {
        return FilenameUtils.getName(_name);
    }

    public Resource getParent() {
        return new NoSuchResource(getParentName());
    }

    public InputStream read() {
        return new ByteArrayInputStream(_bytes);
    }

    public OutputStream write() throws IOException {
        throw new IOException(getClass().getSimpleName() + " is read-only");
    }

    public OutputStream append() throws IOException {
        throw new IOException(getClass().getSimpleName() + " is read-only");
    }

    public boolean exists() {
        return true;
    }

    public boolean isFile() {
        return true;
    }

    public boolean isDirectory() {
        return false;
    }

    public String toString() {
        return getClass().getSimpleName() + "(" + _name + ", size=" + _bytes.length + ")";
    }

    public String getParentName() {
        return FilenameUtils.getPath(_name);
    }

    public String getPath() {
        return _name;
    }

    public long getSizeInBytes() {
        return _bytes.length;
    }

    public void delete() throws IOException {
        throw readOnly();
    }

    private IOException readOnly() {
        return new IOException(getClass().getSimpleName() + " is read-only");
    }

    public void mkdir() throws IOException {
        throw readOnly();
    }

    public boolean newerThan(long mod) {
        return true;
    }

    public long lastModified() {
        return System.currentTimeMillis();
    }

    public void rename(Resource to) throws IOException {
        throw readOnly();
    }
}