/*******************************************************************************
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * Copyright (c) 2007, 2018 Association for Decentralized Information Management
* in Industry THTH ry.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
*******************************************************************************/
package org.simantics.db.impl.query;
-import java.util.concurrent.Semaphore;
-
+import org.simantics.db.exception.DatabaseException;
import org.simantics.db.impl.graph.ReadGraphImpl;
import org.simantics.db.impl.procedure.InternalProcedure;
-import org.simantics.db.procedure.ListenerBase;
-final public class ValueQuery extends UnaryQuery<InternalProcedure<byte[]>> {
-
- private ValueQuery(final int resource) {
+public final class ValueQuery extends UnaryQueryP<byte[]> {
+
+ ValueQuery(int resource) {
super(resource);
}
-
- final static ValueQuery entry(final QueryProcessor provider, final int r) {
- return (ValueQuery)provider.valueMap.get(r);
- }
- final static byte[] runner(final ReadGraphImpl graph, final int r, CacheEntry parent, final ListenerBase listener, final InternalProcedure<byte[]> procedure) {
-
- QueryProcessor processor = graph.processor;
-
- ValueQuery entry = (ValueQuery)processor.valueMap.get(r);
- if(entry == null) {
-
- entry = new ValueQuery(r);
- entry.setPending();
- entry.clearResult(processor.querySupport);
- entry.putEntry(processor);
-
- return (byte[])processor.performForEach(graph, entry, parent, listener, procedure);
-
- } else {
-
- return (byte[])processor.performForEach(graph, entry, parent, listener, procedure);
-
- }
-
- }
-
- final public static byte[] queryEach(ReadGraphImpl graph, final int r, final CacheEntry parent, final ListenerBase listener, final InternalProcedure<byte[]> procedure) {
-
- assert(r != 0);
-
- if(graph.parent == null && listener == null) {
- return ValueQuery.computeForEach(graph, r, null, procedure);
- } else {
- return runner(graph, r, parent, listener, procedure);
- }
-
+ @Override
+ public final void removeEntry(QueryProcessor provider) {
+ provider.cache.remove(this);
}
- final public static byte[] queryEach(ReadGraphImpl graph, final int r, final CacheEntry parent) {
-
- assert(r != 0);
-
- if(graph.parent == null) {
- return ValueQuery.computeForEach(graph, r);
- } else {
- return runner(graph, r, parent, null, null);
- }
-
+ @Override
+ public void compute(ReadGraphImpl graph, InternalProcedure<byte[]> procedure) throws DatabaseException {
+ computeForEach(graph, id, this, procedure);
}
-
- @Override
- public UnaryQuery<InternalProcedure<byte[]>> getEntry(QueryProcessor provider) {
- return provider.valueMap.get(id);
- }
-
- @Override
- public void putEntry(QueryProcessor provider) {
- provider.valueMap.put(id, this);
- }
-
- @Override
- final public void removeEntry(QueryProcessor provider) {
- provider.valueMap.remove(id);
- }
-
-
- public static byte[] computeForEach(ReadGraphImpl graph, final int r, final ValueQuery entry, final InternalProcedure<byte[]> procedure) {
- graph.ensureLoaded(r);
-
- byte[] value = graph.getValue(r);
- if(entry != null) {
- entry.setResult(value);
- entry.setReady();
- }
- if(procedure != null) {
- procedure.execute(graph, value);
- }
-
- return value;
-
- }
+ public static byte[] computeForEach(ReadGraphImpl graph, final int r, final ValueQuery entry, final InternalProcedure<byte[]> procedure_) throws DatabaseException {
- public static byte[] computeForEach(ReadGraphImpl graph, final int r) {
+ InternalProcedure<byte[]> procedure = entry != null ? entry : procedure_;
graph.ensureLoaded(r);
-
- return graph.getValue(r);
-
- }
-
- @Override
- public Object computeForEach(ReadGraphImpl graph, final QueryProcessor queryProvider, final InternalProcedure<byte[]> procedure, final boolean store) {
- return computeForEach(graph, id, this, procedure);
- }
-
- @Override
- public String toString() {
- return "Value[" + id + "]";
- }
- @Override
- public Object performFromCache(ReadGraphImpl graph, QueryProcessor queryProvider, InternalProcedure<byte[]> procedure) {
- return computeForEach(graph, queryProvider, procedure, false);
- }
-
- @Override
- public void recompute(ReadGraphImpl graph, QueryProcessor provider) {
+ byte[] value = graph.getValue(r);
+ if(procedure != null) procedure.execute(graph, value);
- final Semaphore s = new Semaphore(0);
-
- computeForEach(graph, provider, new InternalProcedure<byte[]>() {
+ if(entry != null && procedure_ != null) entry.performFromCache(graph, procedure_);
- @Override
- public void execute(ReadGraphImpl graph, byte[] result) {
- s.release();
- }
-
- @Override
- public void exception(ReadGraphImpl graph, Throwable t) {
- throw new Error("Error in recompute.", t);
- }
+ return value;
- }, true);
-
- while(!s.tryAcquire()) {
- provider.resume(graph);
- }
-
}
-
+
@Override
- boolean isImmutable(ReadGraphImpl graph) {
- return graph.processor.isImmutable(id);
- }
-
+ public String toString() {
+ return "Value[" + id + "]";
+ }
+
}