org.snmp4j.agent.request.SubRequestIteratorSupport Maven / Gradle / Ivy
/*_############################################################################
_##
_## SNMP4J-Agent - SubRequestIteratorSupport.java
_##
_## Copyright (C) 2005-2009 Frank Fock (SNMP4J.org)
_##
_## Licensed 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.snmp4j.agent.request;
import java.util.*;
/**
* This support class allows to implement a SubRequestIterator
* instance based on an Iterator that iterates on
* {@link SubRequest} instances.
*
* @author Frank Fock
* @version 1.0
*/
public class SubRequestIteratorSupport implements SubRequestIterator {
private Iterator subRequests;
/**
* Creates a SubRequestIterator that decorates an
* Iterator.
*
* @param subRequests
* an Iterator on {@link SubRequest} instances or instances
* of other objects if {@link #mapToSubRequest(Object element)} is
* implemented (overwritten) accordingly.
*/
public SubRequestIteratorSupport(Iterator subRequests) {
this.subRequests = subRequests;
}
public boolean hasNext() {
return subRequests.hasNext();
}
public Object next() {
return mapToSubRequest(subRequests.next());
}
public SubRequest nextSubRequest() throws NoSuchElementException {
return mapToSubRequest(subRequests.next());
}
public void remove() {
throw new UnsupportedOperationException();
}
/**
* Returns the SubRequest contained or represented by the
* supplied object (element of the iterator). The default implementation
* simply casts the supplied object to SubRequest.
*
* @param element
* an Object from which a SubRequest can be deduced.
* @return
* a SubRequest instance.
*/
protected SubRequest mapToSubRequest(Object element) {
return (SubRequest)element;
}
}