X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.impl%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fimpl%2Fquery%2FUnaryQuery.java;fp=bundles%2Forg.simantics.db.impl%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fimpl%2Fquery%2FUnaryQuery.java;h=4f95fdebc52add63e77efefd8b8ad3b9413cdc22;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/UnaryQuery.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/UnaryQuery.java
new file mode 100644
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+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/UnaryQuery.java
@@ -0,0 +1,86 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 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
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.impl.query;
+
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.impl.graph.ReadGraphImpl;
+import org.simantics.db.request.RequestFlags;
+
+abstract public class UnaryQuery<Procedure> extends CacheEntryBase implements Query {
+	
+    final public int id;
+
+    public UnaryQuery(int r) {
+        assert(r != 0);
+    	this.id = r;
+    }
+    
+    @Override
+    int makeHash() {
+    	return id;
+    }
+    
+    @Override
+    public int type() {
+        return RequestFlags.INVALIDATE;
+    }
+    
+    @Override
+    final public boolean equals(Object object) {
+        if (this == object)
+            return true;
+        else if (object == null)
+            return false;
+        else if (getClass() != object.getClass())
+            return false;
+        UnaryQuery<?> other = (UnaryQuery<?>)object;
+        return id == other.id;
+    }
+    
+    @Override
+    final public Query getQuery() {
+        assert(!isDiscarded());
+        return this;
+    }
+    
+    @Override
+    public void recompute(ReadGraphImpl graph, Object provider, CacheEntry entry) {
+        recompute(graph, (QueryProcessor)provider);
+    }
+    
+    @Override
+    public void performFromCache(ReadGraphImpl graph, Object provider, Object procedure) {
+        performFromCache(graph, (QueryProcessor)provider, (Procedure)procedure);
+    }
+    
+    abstract public void recompute(ReadGraphImpl graph, QueryProcessor provider);
+    abstract public Object computeForEach(ReadGraphImpl graph, QueryProcessor provider, Procedure procedure, boolean store);
+    abstract public Object performFromCache(ReadGraphImpl graph, QueryProcessor provider, Procedure procedure);
+    abstract public void putEntry(QueryProcessor provider);
+    abstract public void removeEntry(QueryProcessor provider);
+    abstract public UnaryQuery<Procedure> getEntry(QueryProcessor provider);
+	
+    public Object get(ReadGraphImpl graph, QueryProcessor processor, Object procedure) throws Throwable {
+        if(procedure != null) {
+            performFromCache(graph, processor, procedure);
+        } else {
+            checkAndThrow();
+        }
+        return getResult();
+    }
+    
+    @Override
+    boolean isImmutable(ReadGraphImpl graph) throws DatabaseException {
+		return graph.processor.isImmutable(id);
+    }
+    
+}