org.elasticsearch.util.gnu.trove.TFloatFloatIterator Maven / Gradle / Ivy
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/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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 org.elasticsearch.util.gnu.trove;
//////////////////////////////////////////////////
// THIS IS A GENERATED CLASS. DO NOT HAND EDIT! //
//////////////////////////////////////////////////
/**
* Iterator for maps of type float and float.
*
* The iterator semantics for Trove's primitive maps is slightly different
* from those defined in java.util.Iterator, but still well within
* the scope of the pattern, as defined by Gamma, et al.
*
* This iterator does not implicitly advance to the next entry when
* the value at the current position is retrieved. Rather, you must explicitly
* ask the iterator to advance() and then retrieve either the key(),
* the value() or both. This is done so that you have the option, but not
* the obligation, to retrieve keys and/or values as your application requires, and
* without introducing wrapper objects that would carry both. As the iteration is
* stateful, access to the key/value parts of the current map entry happens in
* constant time.
*
* In practice, the iterator is akin to a "search finger" that you move from
* position to position. Read or write operations affect the current entry only and
* do not assume responsibility for moving the finger.
*
* Here are some sample scenarios for this class of iterator:
*
*
* // accessing keys/values through an iterator:
* for (TFloatFloatIterator it = map.iterator();
* it.hasNext();) {
* it.advance();
* if (satisfiesCondition(it.key()) {
* doSomethingWithValue(it.value());
* }
* }
*
*
*
* // modifying values in-place through iteration:
* for (TFloatFloatIterator it = map.iterator();
* it.hasNext();) {
* it.advance();
* if (satisfiesCondition(it.key()) {
* it.setValue(newValueForKey(it.key()));
* }
* }
*
*
*
* // deleting entries during iteration:
* for (TFloatFloatIterator it = map.iterator();
* it.hasNext();) {
* it.advance();
* if (satisfiesCondition(it.key()) {
* it.remove();
* }
* }
*
*
*
* // faster iteration by avoiding hasNext():
* TFloatFloatIterator iterator = map.iterator();
* for (int i = map.size(); i-- > 0;) {
* iterator.advance();
* doSomethingWithKeyAndValue(iterator.key(), iterator.value());
* }
*
*
* @author Eric D. Friedman
* @version $Id: P2PIterator.template,v 1.1 2006/11/10 23:28:00 robeden Exp $
*/
public class TFloatFloatIterator extends TPrimitiveIterator {
/**
* the collection being iterated over
*/
private final TFloatFloatHashMap _map;
/**
* Creates an iterator over the specified map
*/
public TFloatFloatIterator(TFloatFloatHashMap map) {
super(map);
this._map = map;
}
/**
* Moves the iterator forward to the next entry in the underlying map.
*
* @throws java.util.NoSuchElementException
* if the iterator is already exhausted
*/
public void advance() {
moveToNextIndex();
}
/**
* Provides access to the key of the mapping at the iterator's position.
* Note that you must advance() the iterator at least once
* before invoking this method.
*
* @return the key of the entry at the iterator's current position.
*/
public float key() {
return _map._set[_index];
}
/**
* Provides access to the value of the mapping at the iterator's position.
* Note that you must advance() the iterator at least once
* before invoking this method.
*
* @return the value of the entry at the iterator's current position.
*/
public float value() {
return _map._values[_index];
}
/**
* Replace the value of the mapping at the iterator's position with the
* specified value. Note that you must advance() the iterator at
* least once before invoking this method.
*
* @param val the value to set in the current entry
* @return the old value of the entry.
*/
public float setValue(float val) {
float old = value();
_map._values[_index] = val;
return old;
}
}// TFloatFloatIterator