Util.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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 edu.uci.ics.crawler4j.util;


/**
 * @author Yasser Ganjisaffar <lastname at gmail dot com>
 */
public class Util {
	
	public static byte[] long2ByteArray(long l) {
		byte[] array = new byte[8];
        int i, shift;                  
        for(i = 0, shift = 56; i < 8; i++, shift -= 8) {
        	array[i] = (byte)(0xFF & (l >> shift));
        }
        return array;
    }
    
    public static byte[] int2ByteArray(int value) {
    	byte[] b = new byte[4];
        for (int i = 0; i < 4; i++) {
            int offset = (3 - i) * 8;
            b[i] = (byte) ((value >>> offset) & 0xFF);
        }
        return b;
    }
    
    public static void putIntInByteArray(int value, byte[] buf, int offset) {
        for (int i = 0; i < 4; i++) {
            int valueOffset = (3 - i) * 8;
            buf[offset + i] = (byte) ((value >>> valueOffset) & 0xFF);
        }
    }
    
    public static int byteArray2Int(byte[] b) {
        int value = 0;
        for (int i = 0; i < 4; i++) {
            int shift = (4 - 1 - i) * 8;
            value += (b[i] & 0x000000FF) << shift;
        }
        return value;
    }
    
    public static long byteArray2Long(byte[] b) {
        int value = 0;
        for (int i = 0; i < 8; i++) {
            int shift = (8 - 1 - i) * 8;
            value += (b[i] & 0x000000FF) << shift;
        }
        return value;
    }

    public static boolean hasBinaryContent(String contentType) {
		if (contentType != null) {
			String typeStr = contentType.toLowerCase();
			if (typeStr.contains("image") || typeStr.contains("audio") || typeStr.contains("video") || typeStr.contains("application")) {
				return true;
			}
		}
		return false;
    }
    
    public static boolean hasPlainTextContent(String contentType) {
		if (contentType != null) {
			String typeStr = contentType.toLowerCase();
			if (typeStr.contains("text/plain")) {				
				return true;
			}
		}
		return false;
    }
}