org.drools.core.common.NodeMemories Maven / Gradle / Ivy
/*
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* 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.drools.core.common;
import org.kie.internal.runtime.StatefulKnowledgeSession;
/**
* An interface for node memories implementation
*/
public interface NodeMemories {
T getNodeMemory(MemoryFactory node, InternalWorkingMemory wm);
void clearNodeMemory( MemoryFactory node );
void clear();
/**
* Peeks at the content of the node memory for the given
* node ID. This method has no side effects, so if the
* given memory slot for the given node ID is null, it
* will return null.
*
* @param memoryId
* @return
*/
Memory peekNodeMemory( int memoryId );
default Memory peekNodeMemory(NetworkNode node) {
return node instanceof MemoryFactory ? peekNodeMemory(((MemoryFactory)node).getMemoryId()) : null;
}
/**
* Returns the number of positions in this memory
*
* @return
*/
int length();
void resetAllMemories(StatefulKnowledgeSession session);
}