/*
* 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.tinkerpop.gremlin.neo4j.process.util;
import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jEdge;
import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph;
import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jVertex;
import org.neo4j.tinkerpop.api.Neo4jNode;
import org.neo4j.tinkerpop.api.Neo4jRelationship;
import java.util.Iterator;
import java.util.Map;
import java.util.stream.Collectors;
/**
* @author Stephen Mallette (http://stephen.genoprime.com)
*/
public final class Neo4jCypherIterator<T> implements Iterator<Map<String, T>> {
private final Iterator<Map<String, T>> iterator;
private final Neo4jGraph graph;
public Neo4jCypherIterator(final Iterator<Map<String, T>> iterator, final Neo4jGraph graph) {
this.iterator = iterator;
this.graph = graph;
}
@Override
public boolean hasNext() {
return this.iterator.hasNext();
}
@Override
public Map<String, T> next() {
return this.iterator.next().entrySet().stream().collect(Collectors.toMap(
Map.Entry::getKey,
entry -> {
final T val = entry.getValue();
if (Neo4jNode.class.isAssignableFrom(val.getClass())) {
return (T) new Neo4jVertex((Neo4jNode) val, this.graph);
} else if (Neo4jRelationship.class.isAssignableFrom(val.getClass())) {
return (T) new Neo4jEdge((Neo4jRelationship) val, this.graph);
} else {
return val;
}
}));
}
}