org.apache.commons.collections.iterators.ListIteratorWrapper Java Examples

The following examples show how to use org.apache.commons.collections.iterators.ListIteratorWrapper. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: OuterJoinOperatorBase.java    From Flink-CEPplus with Apache License 2.0 5 votes vote down vote up 
private boolean nextGroups(OuterJoinType outerJoinType) throws IOException {
	if (outerJoinType == OuterJoinType.FULL) {
		return nextGroups();
	} else if (outerJoinType == OuterJoinType.LEFT) {
		boolean leftContainsElements = false;
		while (!leftContainsElements && nextGroups()) {
			currLeftIterator = new ListIteratorWrapper(currLeftSubset.iterator());
			if (currLeftIterator.next() != null) {
				leftContainsElements = true;
			}
			currLeftIterator.reset();
		}
		return leftContainsElements;
	} else if (outerJoinType == OuterJoinType.RIGHT) {
		boolean rightContainsElements = false;
		while (!rightContainsElements && nextGroups()) {
			currRightIterator = new ListIteratorWrapper(currRightSubset.iterator());
			if (currRightIterator.next() != null) {
				rightContainsElements = true;
			}
			currRightIterator.reset();
		}
		return rightContainsElements;
	} else {
		throw new IllegalArgumentException("Outer join of type '" + outerJoinType + "' not supported.");
	}
}
Example #2
Source File: OuterJoinOperatorBase.java    From flink with Apache License 2.0 5 votes vote down vote up 
private boolean nextGroups(OuterJoinType outerJoinType) throws IOException {
	if (outerJoinType == OuterJoinType.FULL) {
		return nextGroups();
	} else if (outerJoinType == OuterJoinType.LEFT) {
		boolean leftContainsElements = false;
		while (!leftContainsElements && nextGroups()) {
			currLeftIterator = new ListIteratorWrapper(currLeftSubset.iterator());
			if (currLeftIterator.next() != null) {
				leftContainsElements = true;
			}
			currLeftIterator.reset();
		}
		return leftContainsElements;
	} else if (outerJoinType == OuterJoinType.RIGHT) {
		boolean rightContainsElements = false;
		while (!rightContainsElements && nextGroups()) {
			currRightIterator = new ListIteratorWrapper(currRightSubset.iterator());
			if (currRightIterator.next() != null) {
				rightContainsElements = true;
			}
			currRightIterator.reset();
		}
		return rightContainsElements;
	} else {
		throw new IllegalArgumentException("Outer join of type '" + outerJoinType + "' not supported.");
	}
}
Example #3
Source File: OuterJoinOperatorBase.java    From flink with Apache License 2.0 5 votes vote down vote up 
private boolean nextGroups(OuterJoinType outerJoinType) throws IOException {
	if (outerJoinType == OuterJoinType.FULL) {
		return nextGroups();
	} else if (outerJoinType == OuterJoinType.LEFT) {
		boolean leftContainsElements = false;
		while (!leftContainsElements && nextGroups()) {
			currLeftIterator = new ListIteratorWrapper(currLeftSubset.iterator());
			if (currLeftIterator.next() != null) {
				leftContainsElements = true;
			}
			currLeftIterator.reset();
		}
		return leftContainsElements;
	} else if (outerJoinType == OuterJoinType.RIGHT) {
		boolean rightContainsElements = false;
		while (!rightContainsElements && nextGroups()) {
			currRightIterator = new ListIteratorWrapper(currRightSubset.iterator());
			if (currRightIterator.next() != null) {
				rightContainsElements = true;
			}
			currRightIterator.reset();
		}
		return rightContainsElements;
	} else {
		throw new IllegalArgumentException("Outer join of type '" + outerJoinType + "' not supported.");
	}
}
Example #4
Source File: IteratorUtils.java    From Penetration_Testing_POC with Apache License 2.0 3 votes vote down vote up 
/**
 * Gets a list iterator based on a simple iterator.
 * <p>
 * As the wrapped Iterator is traversed, a LinkedList of its values is
 * cached, permitting all required operations of ListIterator.
 *
 * @param iterator  the iterator to use, not null
 * @return a new iterator
 * @throws NullPointerException if iterator parameter is null
 */
public static ListIterator toListIterator(Iterator iterator) {
    if (iterator == null) {
        throw new NullPointerException("Iterator must not be null");
    }
    return new ListIteratorWrapper(iterator);
}