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///////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2001, Eric D. Friedman All Rights Reserved.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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 Lesser General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
///////////////////////////////////////////////////////////////////////////////
package gnu.trove.iterator;
//////////////////////////////////////////////////
// THIS IS A GENERATED CLASS. DO NOT HAND EDIT! //
//////////////////////////////////////////////////
/**
* Iterator for maps of type #k# and #v#.
*
* <p>The iterator semantics for Trove's primitive maps is slightly different
* from those defined in <tt>java.util.Iterator</tt>, but still well within
* the scope of the pattern, as defined by Gamma, et al.</p>
*
* <p>This iterator does <b>not</b> implicitly advance to the next entry when
* the value at the current position is retrieved. Rather, you must explicitly
* ask the iterator to <tt>advance()</tt> and then retrieve either the <tt>key()</tt>,
* the <tt>value()</tt> 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.</p>
*
* <p>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.</p>
*
* <p>Here are some sample scenarios for this class of iterator:</p>
*
* <pre>
* // accessing keys/values through an iterator:
* for ( T#K##V#Iterator it = map.iterator(); it.hasNext(); ) {
* it.advance();
* if ( satisfiesCondition( it.key() ) {
* doSomethingWithValue( it.value() );
* }
* }
* </pre>
*
* <pre>
* // modifying values in-place through iteration:
* for ( T#K##V#Iterator it = map.iterator(); it.hasNext(); ) {
* it.advance();
* if ( satisfiesCondition( it.key() ) {
* it.setValue( newValueForKey( it.key() ) );
* }
* }
* </pre>
*
* <pre>
* // deleting entries during iteration:
* for ( T#K##V#Iterator it = map.iterator(); it.hasNext(); ) {
* it.advance();
* if ( satisfiesCondition( it.key() ) {
* it.remove();
* }
* }
* </pre>
*
* <pre>
* // faster iteration by avoiding hasNext():
* T#K##V#Iterator iterator = map.iterator();
* for ( int i = map.size(); i-- > 0; ) {
* iterator.advance();
* doSomethingWithKeyAndValue( iterator.key(), iterator.value() );
* }
* </pre>
*/
public interface T#K##V#Iterator extends TAdvancingIterator {
/**
* Provides access to the key of the mapping at the iterator's position.
* Note that you must <tt>advance()</tt> the iterator at least once
* before invoking this method.
*
* @return the key of the entry at the iterator's current position.
*/
public #k# key();
/**
* Provides access to the value of the mapping at the iterator's position.
* Note that you must <tt>advance()</tt> the iterator at least once
* before invoking this method.
*
* @return the value of the entry at the iterator's current position.
*/
public #v# value();
/**
* Replace the value of the mapping at the iterator's position with the
* specified value. Note that you must <tt>advance()</tt> 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 #v# setValue( #v# val );
}
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