arrayutils.js

这是一个关于java的JSP页面中使用象Swing组件的一个库文件.

function uiUtil_ArrayUtils() {
  this._super();
}
uiUtil_ArrayUtils = uiUtil_Object.declareUtil(uiUtil_ArrayUtils, uiUtil_Object);
uiUtil_ArrayUtils.INVALID_INDEX = -1;
uiUtil_ArrayUtils.indexOf = function(array, item, optEqualityTester) {
  var equalityTester = uiUtil_Type.getEqualityTester(optEqualityTester);
  for (var i = 0; i < array.length; ++i) {
    if (equalityTester.equals(array[i], item)) {
      return i;
    }
  }
  return uiUtil_ArrayUtils.INVALID_INDEX;
};
uiUtil_ArrayUtils.contains = function(array, item, optTester) {
  var index = uiUtil_ArrayUtils.indexOf(array, item, optTester);
  return index != uiUtil_ArrayUtils.INVALID_INDEX;
};
uiUtil_ArrayUtils.get = function(array, index) {
  if (index >= array.length) {
    throw new uiUtil_IllegalArgumentException("Index out of bound: " + index);
  }
  if (index >= 0) {
    return array[index];
  }
  return array[array.length + index];  
};
uiUtil_ArrayUtils.clear = function(array) {
  while (array.length > 0) {
    array.pop();
  }
};
uiUtil_ArrayUtils.addUnique = function(array, item, optEqualityTester) {
  if (!uiUtil_ArrayUtils.contains(array, item, optEqualityTester)) {
    array.push(item);
  }
};
uiUtil_ArrayUtils.removeFirst = function(array, item, optEqualityTester) {
  var index = uiUtil_ArrayUtils.indexOf(array, item, optEqualityTester);
  if (index != uiUtil_ArrayUtils.INVALID_INDEX) {
    uiUtil_ArrayUtils.removeAt(array, index, 1);
  }
};
uiUtil_ArrayUtils.removeAt = function(array, index, optCount) {
  var count = ((uiUtil_Type.isInt(optCount)) ? optCount : 1);
  if (index >= 0) {
    array.splice(index, count);
  }
  else {  
    array.splice(array.length + index - count + 1, count);
  }
};
uiUtil_ArrayUtils.sort = function(array, optComparator) {
  var comparator = uiUtil_Type.getComparator(optComparator);
  array.sort(comparator.compare);
};
uiUtil_ArrayUtils.reverse = function(array, optComparator) {
  var comparator = uiUtil_Type.getComparator(optComparator);
  array.reverse(comparator.compare);
};
uiUtil_ArrayUtils.toArrayIfNotAlready = function(collection) {
  if (collection instanceof Array) {
    return collection;
  }
  if (uiUtil_Type.isDefined(collection) &&
      uiUtil_Type.isDefined(collection[0]) &&
      uiUtil_Type.isInt(collection.length)) {
    var array = new Array(collection.length);
    for (var i = 0; i < collection.length; ++i) {
      array[i] = collection[i];
    }
    return array;
  }
  throw new uiUtil_IllegalArgumentException(
      "The provided argument is not a valid collection");
};
uiUtil_ArrayUtils.toString = function(array) {
  var string = array.getClassName() + "{";
  if (array.length > 0) {
    string += array[0];
    for (var i = 1; i < array.length; ++i) {
      string += ", " + array[i];
    }
  }
  return string + "}";
};