1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.db.common.request;
14 import org.simantics.db.ReadGraph;
15 import org.simantics.db.exception.DatabaseException;
16 import org.simantics.db.request.Read;
18 public abstract class UnaryParametrizedRead<P, C, R> implements ParametrizedRead<P, R> {
20 final protected C constant;
22 public UnaryParametrizedRead(C constant) {
23 this.constant = constant;
26 abstract public R perform(ReadGraph graph, P parameter) throws DatabaseException;
29 public Read<R> get(P parameter) {
30 return new BinaryRead<P, C, R>(parameter, constant) {
33 public R perform(ReadGraph graph) throws DatabaseException {
34 return UnaryParametrizedRead.this.perform(graph, parameter);