com.acciente.commons.loader.FileResourceDef.java Source code

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Here is the source code for com.acciente.commons.loader.FileResourceDef.java

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/*
 * Copyright 2008-2013 Acciente, LLC
 *
 * Acciente, LLC licenses this file to you 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 com.acciente.commons.loader;

import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;

/**
 * An implementation of a ResourceDef backed by files.
 *
 * @see ClassDef
 *
 * @created Sep 30, 2008
 *
 * @author Adinath Raveendra Raj
 */
public class FileResourceDef implements ResourceDef {
    // compiled file data
    private File _oResourceFile;
    private long _iLastModifiedTimeAtLastLoad;

    // class data
    private String _sResourceName;
    private byte[] _ayContent;

    FileResourceDef(String sResourceName, File oResourceFile) {
        _sResourceName = sResourceName;
        _oResourceFile = oResourceFile;

        loadResourceFile();
    }

    public String getResourceName() {
        return _sResourceName;
    }

    public boolean isModified() {
        return (_oResourceFile.lastModified() != _iLastModifiedTimeAtLastLoad);
    }

    public void reload() {
        loadResourceFile();
    }

    public byte[] getContent() {
        return _ayContent;
    }

    private void loadResourceFile() {
        try {
            // checkpoint the compiled file's modified date before the compile
            long iLastModifiedTimeAtLastLoad = _oResourceFile.lastModified();

            _ayContent = FileUtils.readFileToByteArray(_oResourceFile);

            _iLastModifiedTimeAtLastLoad = iLastModifiedTimeAtLastLoad;
        } catch (IOException e) {
            _ayContent = null;
            _iLastModifiedTimeAtLastLoad = 0;
        }
    }
}

// EOF