edu.uci.ics.crawler4j.util.Util Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of crawler4j Show documentation
Open Source Web Crawler for Java
There is a newer version: 4.4.0
/**
 * 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
 */
public class Util {

  public static byte[] long2ByteArray(long l) {
    byte[] array = new byte[8];
    int i;
    int 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) {
    String typeStr = (contentType != null) ? contentType.toLowerCase() : "";

    return typeStr.contains("image") || typeStr.contains("audio") || typeStr.contains("video") ||
           typeStr.contains("application");
  }

  public static boolean hasPlainTextContent(String contentType) {
    String typeStr = (contentType != null) ? contentType.toLowerCase() : "";

    return typeStr.contains("text") && !typeStr.contains("html");
  }

}