org.opoo.press.file.WatchableFiles.java Source code

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Here is the source code for org.opoo.press.file.WatchableFiles.java

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/*
 * Copyright 2014 Alex Lin.
 *
 * 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.opoo.press.file;

import org.apache.commons.io.monitor.FileEntry;

import java.io.File;

/**
 * @author Alex Lin
 *
 */
public class WatchableFiles implements Watchable {
    private FileEntry[] entries;

    public WatchableFiles(File... files) {
        if (files == null || files.length == 0) {
            throw new IllegalArgumentException("files are required.");
        }
        entries = new FileEntry[files.length];
        for (int i = 0; i < files.length; i++) {
            entries[i] = new FileEntry(files[i]);
        }
    }

    /* (non-Javadoc)
     * @see org.opoo.press.monitor.Observer#initialize()
     */
    @Override
    public void initialize() {
        for (FileEntry entry : entries) {
            entry.refresh(entry.getFile());
        }
    }

    /* (non-Javadoc)
     * @see org.opoo.press.monitor.Observer#check()
     */
    @Override
    public Result check() {
        Result result = Result.newResult();
        for (FileEntry entry : entries) {
            if (entry.refresh(entry.getFile())) {
                //check update only
                result.addUpdatedFile(entry.getFile());
            }
        }
        return result;
    }

    /* (non-Javadoc)
     * @see org.opoo.press.monitor.Observer#destroy()
     */
    @Override
    public void destroy() {
    }
}