com.esri.geoportal.harvester.unc.UncFolder.java Source code

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Here is the source code for com.esri.geoportal.harvester.unc.UncFolder.java

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/*
 * Copyright 2016 Esri, Inc.
 *
 * 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 com.esri.geoportal.harvester.unc;

import java.io.File;
import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.nio.file.PathMatcher;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import org.apache.commons.lang3.StringUtils;

/**
 * UNC folder.
 */
/*package*/ class UncFolder {
    private static final FileSystem fileSystem = FileSystems.getDefault();
    private static final String DEFAULT_MATCH_PATTERN = "**.xml";

    private final UncBroker broker;
    private final File folder;
    private final String matchPattern;
    private final Date since;

    /**
     * Creates instance of the UNC folder.
     * @param broker broker
     * @param folder folder
     * @param matchPattern match pattern
     * @param since since date
     */
    public UncFolder(UncBroker broker, File folder, String matchPattern, Date since) {
        this.broker = broker;
        this.folder = folder;
        this.matchPattern = StringUtils.defaultIfBlank(matchPattern, DEFAULT_MATCH_PATTERN);
        this.since = since;
    }

    /**
     * Reads content of the folder.
     * @return content
     * @throws IOException if error reading content
     * @throws URISyntaxException if invalid URL
     */
    public UncFolderContent readContent() throws IOException, URISyntaxException {
        List<UncFile> files = new ArrayList<>();
        List<UncFolder> subFolders = new ArrayList<>();

        Arrays.asList(folder.listFiles()).forEach(f -> {
            if (f.isDirectory()) {
                subFolders.add(new UncFolder(broker, f, matchPattern, since));
            } else if (f.isFile() && matchFileName(f, matchPattern)
                    && (since == null || f.lastModified() >= since.getTime())) {
                files.add(new UncFile(broker, f));
            }
        });

        return new UncFolderContent(this, subFolders, files);
    }

    @Override
    public String toString() {
        return folder.toString();
    }

    /**
     * Matches file
     * @param file file
     * @param pattern match patter (glob)
     * @return <code>true</code> if URL matches the pattern
     */
    private boolean matchFileName(File file, String pattern) {
        Path path = file.toPath();
        PathMatcher pathMatcher = fileSystem.getPathMatcher("glob:" + pattern);
        return pathMatcher.matches(path);
    }

}