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/*******************************************************************************
* Copyright (c) 2013, 2015 Willink Transformations and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* E.D.Willink - Initial API and implementation
*******************************************************************************/
package org.eclipse.qvtd.runtime.evaluation;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.qvtd.runtime.internal.evaluation.AbstractInvocationInternal;
/**
* AbstractInvocation provides the mandatory shared functionality of the intrusive blocked/waiting linked list functionality.
* @since 1.1
*/
public abstract class AbstractInvocation extends AbstractInvocationInternal implements Invocation
{
public abstract static class Incremental extends AbstractInvocation implements Invocation.Incremental
{
public static final @NonNull List<@NonNull Object> EMPTY_OBJECT_LIST = Collections.emptyList();
public static final @NonNull List<SlotState.@NonNull Incremental> EMPTY_SLOT_LIST = Collections.emptyList();
private Set<@NonNull Object> createdObjects = null;
private Set<SlotState.@NonNull Incremental> readSlots = null;
private Set<SlotState.@NonNull Incremental> writeSlots = null;
@Override
public void addCreatedObject(@NonNull Object createdObject) {
if (createdObjects == null) {
createdObjects = new HashSet<@NonNull Object>();
}
createdObjects.add(createdObject);
}
@Override
public void addReadSlot(SlotState.@NonNull Incremental readSlot) {
if (readSlots == null) {
readSlots = new HashSet<SlotState.@NonNull Incremental>();
}
readSlots.add(readSlot);
readSlot.addTargetInternal(this);
}
@Override
public void addWriteSlot(SlotState.@NonNull Incremental writeSlot) {
if (writeSlots == null) {
writeSlots = new HashSet<SlotState.@NonNull Incremental>();
}
writeSlots.add(writeSlot);
writeSlot.addSourceInternal(this);
}
@Override
public @NonNull Iterable<@NonNull Object> getCreatedObjects() {
return createdObjects != null ? createdObjects : EMPTY_OBJECT_LIST;
}
@Override
public @NonNull Iterable<SlotState.@NonNull Incremental> getReadSlots() {
return readSlots != null ? readSlots : EMPTY_SLOT_LIST;
}
@Override
public @NonNull Iterable<SlotState.@NonNull Incremental> getWriteSlots() {
return writeSlots != null ? writeSlots : EMPTY_SLOT_LIST;
}
}
@Override
public <R> R accept(@NonNull ExecutionVisitor<R> visitor) {
return visitor.visitInvocation(this);
}
}
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