| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.jena.query; |
| |
| import java.util.HashMap ; |
| import java.util.Iterator ; |
| import java.util.Map ; |
| |
| import org.apache.jena.rdf.model.RDFNode ; |
| import org.apache.jena.sparql.core.QuerySolutionBase ; |
| import org.apache.jena.sparql.core.Var ; |
| import org.apache.jena.sparql.util.FmtUtils ; |
| |
| /** Implementation of QuerySolution that is backed by an in-memory map. */ |
| |
| public class QuerySolutionMap extends QuerySolutionBase |
| { |
| private Map<String, RDFNode> map = new HashMap<>() ; |
| |
| public QuerySolutionMap() { } |
| |
| public void add(String name, RDFNode node) |
| { map.put(Var.canonical(name), node) ; } |
| |
| @Override |
| protected RDFNode _get(String varName) { return map.get(varName) ; } |
| |
| @Override |
| protected boolean _contains(String varName) { return map.containsKey(varName) ; } |
| |
| @Override |
| public Iterator<String> varNames() { return map.keySet().iterator() ; } |
| |
| /** Add all of the solutions from one QuerySolutionMap into this QuerySolutionMap */ |
| public void addAll(QuerySolutionMap other) |
| { |
| map.putAll(other.map); |
| } |
| |
| /** Return a <code>Map<String, RDFNode></code> representing the current |
| * state of this <code>QuerySolutionMap</code>. The map is not connected |
| * to the <code>QuerySolutionMap</code> and later changes to either <code>Map</code> |
| * or <code>QuerySolutionMap</code> will not reflected in the other. |
| * |
| * @return {@literal Map<String, RDFNode>} |
| */ |
| public Map<String, RDFNode> asMap() { |
| return new HashMap<>(map) ; |
| } |
| |
| /** Add all of the solutions from one QuerySolution into this QuerySolutionMap */ |
| public void addAll(QuerySolution other) |
| { |
| Iterator<String> iter = other.varNames() ; |
| for ( ; iter.hasNext(); ) |
| { |
| String vName = iter.next() ; |
| RDFNode rdfNode = other.get(vName) ; |
| map.put(vName, rdfNode); |
| } |
| } |
| |
| /** Clear this QuerySolutionMap */ |
| public void clear() { map.clear(); } |
| |
| @Override |
| public String toString() |
| { |
| String tmp = "" ; |
| String sep = "" ; |
| for ( Iterator<String> iter = varNames() ; iter.hasNext() ; ) |
| { |
| String varName = iter.next() ; |
| RDFNode n = _get(varName) ; |
| String nStr = FmtUtils.stringForRDFNode(n) ; |
| tmp = tmp+sep+"( ?"+varName+", "+nStr+" )" ; |
| } |
| return tmp ; |
| } |
| } |