com.googlecode.jweb1t.FileMap.java Source code

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Here is the source code for com.googlecode.jweb1t.FileMap.java

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/*
 * Copyright 2007 FBK-irst http://www.itc.it/)
 *
 * 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.googlecode.jweb1t;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.LineNumberReader;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;

/**
 *
 * Represents an index showing which ngrams (indexed by the first two characters) are to be found in which files on the disk.
 * 
 * @author Claudio Giuliano
 */
public class FileMap {
    private static final String LF = System.getProperty("line.separator");

    private final Map<String, String[]> map;

    private final File indexFile;

    public FileMap(final File aIndexFile) throws IOException {
        indexFile = aIndexFile;
        map = new HashMap<String, String[]>();
        read(aIndexFile);
    }

    private void read(final File aFile) throws IOException {
        LineNumberReader reader = null;
        try {
            reader = new LineNumberReader(new FileReader(aFile));
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (line.length() > 0) {
                    final String[] s = line.split("\t");
                    final String[] t = new String[s.length - 1];
                    System.arraycopy(s, 1, t, 0, t.length);

                    // get absolute path for stored relative path
                    for (int i = 0; i < t.length; i++) {
                        t[i] = new File(indexFile.getParent(), t[i]).getAbsolutePath();
                    }

                    map.put(s[0], t);
                }
            }
        } finally {
            IOUtils.closeQuietly(reader);
        }
    }

    public String[] get(final String ch) {
        return map.get(ch);
    }

    public static int main(final String args[]) throws IOException {
        String logConfig = System.getProperty("log-config");
        if (logConfig == null) {
            logConfig = "log-config.txt";
        }

        if (args.length != 2) {
            System.out.println("java PACKAGE.FileMap index-file char"); // NOPMD
            return -1;
        }

        final String ch = args[1].substring(0, 1);

        final FileMap map = new FileMap(new File(args[0]));
        final String[] s = map.get(ch);

        System.out.print("\"" + ch + "\"\t"); // NOPMD

        for (int i = 0; i < s.length; i++) {
            if (i > 0) {
                System.out.print(" "); // NOPMD
            }
            System.out.print(s[i]); // NOPMD
        }

        System.out.print("\n"); // NOPMD
        return 0;
    }

    @Override
    public String toString() {
        final StringBuilder buffer = new StringBuilder();
        for (final String key : map.keySet()) {
            buffer.append(key);
            buffer.append(" - ");
            buffer.append(StringUtils.join(map.get(key), ","));
            buffer.append(LF);
        }
        buffer.append(LF);

        return buffer.toString();
    }
}