Android Open Source - anokicert Array Utils

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 *        Twidere - Twitter client for Android
 * /*from w ww  .  ja v  a  2s.  c  om*/
 * Copyright (C) 2012 Mariotaku Lee <mariotaku.lee@gmail.com>
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.mariotaku.anokicert.util;

import java.util.ArrayList;
import java.util.List;

public final class ArrayUtils {

  private ArrayUtils() {
    throw new AssertionError("You are trying to create an instance for this utility class!");
  }

  public static boolean contains(final long[] array, final long value) {
    if (array == null) return false;
    for (final long item : array) {
      if (item == value) return true;
    }
    return false;
  }

  public static boolean contains(final Object[] array, final Object... values) {
    if (array == null || values == null) return false;
    for (final Object item : array) {
      for (final Object value : values) {
        if (item == null || value == null) {
          if (item == value) return true;
          continue;
        }
        if (item.equals(value)) return true;
      }
    }
    return false;
  }

  public static boolean contentMatch(final Object[] array1, final Object[] array2) {
    if (array1 == null || array2 == null) return array1 == array2;
    if (array1.length != array2.length) return false;
    final int length = array1.length;
    for (int i = 0; i < length; i++) {
      if (!contains(array2, array1[i])) return false;
    }
    return true;
  }

  public static long[] fromList(final List<Long> list) {
    if (list == null) return null;
    final int count = list.size();
    final long[] array = new long[count];
    for (int i = 0; i < count; i++) {
      array[i] = list.get(i);
    }
    return array;
  }

  public static long[] fromString(final String string, final char token) {
    if (string == null) return new long[0];
    final String[] items_string_array = string.split(String.valueOf(token));
    final ArrayList<Long> items_list = new ArrayList<Long>();
    for (final String id_string : items_string_array) {
      try {
        items_list.add(Long.parseLong(id_string));
      } catch (final NumberFormatException e) {
        // Ignore.
      }
    }
    final int list_size = items_list.size();
    final long[] array = new long[list_size];
    for (int i = 0; i < list_size; i++) {
      array[i] = items_list.get(i);
    }
    return array;
  }

  public static int indexOf(final long[] array, final long value) {
    final int length = array.length;
    for (int i = 0; i < length; i++) {
      if (array[i] == value) return i;
    }
    return -1;
  }

  public static int indexOf(final Object[] array, final Object value) {
    final int length = array.length;
    for (int i = 0; i < length; i++) {
      if (array[i].equals(value)) return i;
    }
    return -1;
  }

  public static long[] intersection(final long[] array1, final long[] array2) {
    if (array1 == null || array2 == null) return new long[0];
    final List<Long> list1 = new ArrayList<Long>();
    for (final long item : array1) {
      list1.add(item);
    }
    final List<Long> list2 = new ArrayList<Long>();
    for (final long item : array2) {
      list2.add(item);
    }
    list1.retainAll(list2);
    return fromList(list1);
  }

  public static String mergeArrayToString(final String[] array) {
    if (array == null) return null;
    final StringBuilder builder = new StringBuilder();
    for (final String c : array) {
      builder.append(c);
    }
    return builder.toString();
  }

  public static long[] subArray(final long[] array, final int start, final int end) {
    final int length = end - start;
    if (length < 0) throw new IllegalArgumentException();
    final long[] result = new long[length];
    System.arraycopy(array, start, result, 0, length);
    return result;
  }

  public static Object[] subArray(final Object[] array, final int start, final int end) {
    final int length = end - start;
    if (length < 0) throw new IllegalArgumentException();
    final Object[] result = new Object[length];
    System.arraycopy(array, start, result, 0, length);
    return result;
  }

  public static String[] subArray(final String[] array, final int start, final int end) {
    final int length = end - start;
    if (length < 0) throw new IllegalArgumentException();
    final String[] result = new String[length];
    System.arraycopy(array, start, result, 0, length);
    return result;
  }

  public static String toString(final long[] array, final char token, final boolean include_space) {
    final StringBuilder builder = new StringBuilder();
    final int length = array.length;
    for (int i = 0; i < length; i++) {
      final String id_string = String.valueOf(array[i]);
      if (id_string != null) {
        if (i > 0) {
          builder.append(include_space ? token + " " : token);
        }
        builder.append(id_string);
      }
    }
    return builder.toString();
  }

  public static String toString(final Object[] array, final char token, final boolean include_space) {
    final StringBuilder builder = new StringBuilder();
    final int length = array.length;
    for (int i = 0; i < length; i++) {
      final String id_string = String.valueOf(array[i]);
      if (id_string != null) {
        if (i > 0) {
          builder.append(include_space ? token + " " : token);
        }
        builder.append(id_string);
      }
    }
    return builder.toString();
  }

  public static String[] toStringArray(final Object[] array) {
    if (array == null) return null;
    final int length = array.length;
    final String[] string_array = new String[length];
    for (int i = 0; i < length; i++) {
      final Object item = array[i];
      string_array[i] = item != null ? item.toString() : null;
    }
    return string_array;
  }

  public static String[] toStringArray(final String s) {
    if (s == null) return null;
    return s.split("(?!^)");
  }

  public static String toStringForSQL(final String[] array) {
    final int size = array != null ? array.length : 0;
    final StringBuilder builder = new StringBuilder();
    for (int i = 0; i < size; i++) {
      if (i > 0) {
        builder.append(',');
      }
      builder.append('?');
    }
    return builder.toString();
  }
}

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