com.junoyoon.BullsUtil.java Source code

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Here is the source code for com.junoyoon.BullsUtil.java

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/**
 * Copyright (C) 2009 JunHo Yoon
 *
 * bullshtml is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * bullshtml is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 */

package com.junoyoon;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Iterator;
import java.util.List;

import org.stringtemplate.v4.ST;
import org.stringtemplate.v4.STGroup;
import org.stringtemplate.v4.STRawGroupDir;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;

/**
 * Utility class
 * 
 * @author JunHo Yoon (junoyoon@gmail.com)
 */
public class BullsUtil {
    private static STGroup group = new STRawGroupDir("template", '$', '$');

    public static ST getTemplate(String templateName) {
        return group.getInstanceOf(templateName);
    }

    /**
     * Make path to file form.
     * 
     * @param path
     * @return normalized path
     */
    public static String normalizePath(File path) {
        try {
            return normalizePath(path.getCanonicalPath());
        } catch (IOException e) {
            return normalizePath(path.getAbsolutePath());
        }
    }

    /**
     * Make path to file form.
     * 
     * @param path
     * @return normalized path
     */
    public static String normalizePath(String path) {
        return path.replace(" ", "_").replace(":", "_").replace("\\", "_").replace("/", "_").replace(".", "_");
    }

    /**
     * Write file
     * 
     * @param path
     *            the path
     * @param content
     *            content
     */
    public static void writeToFile(File path, String content) {
        try {
            FileUtils.writeStringToFile(path, content, "UTF-8");
        } catch (IOException e) {
            BullsHtml.printErrorAndExit(e);
        }
    }

    public static void copyResource(String toDir, String fileName) throws IOException {
        File file = new File(toDir);
        if (!file.getParentFile().exists()) {
            file.getParentFile().mkdirs();
        }
        try {
            InputStream is = BullsUtil.class.getClassLoader().getResourceAsStream(fileName);
            FileOutputStream fs = new FileOutputStream(toDir);
            IOUtils.copy(is, fs);
            IOUtils.closeQuietly(is);
            IOUtils.closeQuietly(fs);
        } catch (Exception e) {
            BullsHtml.printErrorAndExit(e);
        }
    }

    /**
     * Run command and
     * 
     * @param cmd
     * @return
     * @throws IOException
     */
    public static String getCmdOutput(List<String> cmd) throws IOException {
        ProcessBuilder builder = new ProcessBuilder();
        builder.command().addAll(cmd);
        builder.redirectErrorStream(true);
        StringBuilder result = new StringBuilder(1024);
        Process proc = builder.start();
        boolean firstLine = true;
        for (Object eachLineObject : IOUtils.readLines(proc.getInputStream())) {
            String eachLine = (String) eachLineObject;
            if (firstLine) {
                eachLine = eachLine.replace("charset=us-ascii", "charset=" + Constant.DEFAULT_ENCODING);
                firstLine = false;
            }
            result.append(eachLine).append("\n");
        }
        return result.toString();
    }

    /**
     * Load Resource
     * 
     * @param resourceLocation
     * @return
     */
    public static String loadResourceContent(String resourceLocation) {
        StringBuilder result = new StringBuilder(1024);
        try {
            InputStream is = BullsUtil.class.getClassLoader().getResourceAsStream(resourceLocation);
            InputStreamReader inputStream = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(inputStream);
            String buffer;
            while ((buffer = br.readLine()) != null) {
                result.append(buffer).append("\n");
            }
            br.close();
        } catch (Exception e) {
            BullsHtml.printErrorAndExit(e);
        }
        return result.toString();
    }

    public static <T> PeekingIterator<T> peekingIterator(Iterator<? extends T> iterator) {
        if (iterator instanceof PeekingIterator<?>) {
            @SuppressWarnings("unchecked")
            PeekingIterator<T> peeking = (PeekingIterator<T>) iterator;
            return peeking;
        }
        return new PeekingIterator<T>(iterator);
    }
}