| /* |
| * 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.rya.indexing.pcj.fluo.app.query; |
| |
| import org.apache.commons.lang3.builder.EqualsBuilder; |
| import org.apache.rya.indexing.pcj.fluo.app.ConstructGraph; |
| import org.apache.rya.indexing.pcj.storage.accumulo.VariableOrder; |
| import org.eclipse.rdf4j.query.BindingSet; |
| |
| import com.google.common.base.Objects; |
| import com.google.common.base.Preconditions; |
| |
| import edu.umd.cs.findbugs.annotations.DefaultAnnotation; |
| import edu.umd.cs.findbugs.annotations.NonNull; |
| |
| /** |
| * Metadata object used to store metadata for Construct Query Nodes found in |
| * SPARQL queries. |
| * |
| */ |
| public class ConstructQueryMetadata extends CommonNodeMetadata { |
| |
| private String childNodeId; |
| private ConstructGraph graph; |
| private String parentNodeId; |
| |
| /** |
| * Creates ConstructQueryMetadata object from the provided metadata arguments. |
| * @param nodeId - id for the ConstructQueryNode |
| * @param childNodeId - id for the child of the ConstructQueryNode |
| * @param graph - {@link ConstructGraph} used to project {@link BindingSet}s onto sets of statement representing construct graph |
| * @param sparql - SPARQL query containing construct graph |
| */ |
| public ConstructQueryMetadata(String nodeId, String parentNodeId, String childNodeId, VariableOrder varOrder, ConstructGraph graph) { |
| super(nodeId, varOrder); |
| this.childNodeId = Preconditions.checkNotNull(childNodeId); |
| this.parentNodeId = Preconditions.checkNotNull(parentNodeId); |
| this.graph = Preconditions.checkNotNull(graph); |
| } |
| |
| /** |
| * @return The node whose results are projected onto the given |
| * {@link ConstructGraph}. |
| */ |
| public String getChildNodeId() { |
| return childNodeId; |
| } |
| |
| /** |
| * @return The parent of this construct node |
| */ |
| public String getParentNodeId() { |
| return parentNodeId; |
| } |
| |
| /** |
| * @return The ConstructGraph used to form statement {@link BindingSet}s for |
| * this Construct Query |
| */ |
| public ConstructGraph getConstructGraph() { |
| return graph; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(super.getNodeId(), super.getVariableOrder(), parentNodeId, childNodeId, graph); |
| } |
| |
| @Override |
| public boolean equals(final Object o) { |
| if (this == o) { |
| return true; |
| } |
| |
| if (o instanceof ConstructQueryMetadata) { |
| ConstructQueryMetadata queryMetadata = (ConstructQueryMetadata) o; |
| if (super.equals(queryMetadata)) { |
| return new EqualsBuilder().append(parentNodeId, queryMetadata.parentNodeId).append(childNodeId, queryMetadata.childNodeId).append(graph, queryMetadata.graph) |
| .isEquals(); |
| } |
| return false; |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return new StringBuilder().append("Construct Query Metadata {\n").append(" Node ID: " + super.getNodeId() + "\n") |
| .append(" Variable Order: " + super.getVariableOrder() + "\n") |
| .append(" Child Node ID: " + childNodeId + "\n").append(" Construct Graph: " + graph.getProjections() + "\n") |
| .append("}").toString(); |
| } |
| |
| /** |
| * Creates a new {@link Builder} for this class. |
| * |
| * @return A new {@link Builder} for this class. |
| */ |
| public static Builder builder() { |
| return new Builder(); |
| } |
| |
| /** |
| * Builds instances of {@link QueryMetadata}. |
| */ |
| @DefaultAnnotation(NonNull.class) |
| public static final class Builder implements CommonNodeMetadata.Builder { |
| |
| |
| private String nodeId; |
| private ConstructGraph graph; |
| private String parentNodeId; |
| private String childNodeId; |
| private VariableOrder varOrder; |
| |
| /** |
| * Set the node Id that identifies this Construct Query Node |
| * |
| * @param nodeId |
| * id for this node |
| * @return This builder so that method invocations may be chained. |
| */ |
| public Builder setNodeId(String nodeId) { |
| this.nodeId = nodeId; |
| return this; |
| } |
| |
| /** |
| * @return the node id for this construct query |
| */ |
| public String getNodeId() { |
| return nodeId; |
| } |
| |
| /** |
| * Sets the VariableOrder that determines how results will be written |
| * @param varOrder |
| * @return This builder so that method invocations may be chained. |
| */ |
| public Builder setVarOrder(VariableOrder varOrder) { |
| this.varOrder = varOrder; |
| return this; |
| } |
| |
| @Override |
| public VariableOrder getVariableOrder() { |
| return varOrder; |
| } |
| |
| /** |
| * Set the ConstructGraph used to form statement {@link BindingSet}s for this Construct Query |
| * |
| * @param varOrder - ConstructGraph to project {@link BindingSet}s onto RDF statements |
| * @return This builder so that method invocations may be chained. |
| */ |
| public Builder setConstructGraph(ConstructGraph graph) { |
| this.graph = graph; |
| return this; |
| } |
| |
| /** |
| * Set the node whose results are projected onto the given {@link ConstructGraph}. |
| * |
| * @param childNodeId - The node whose results are projected onto the given {@link ConstructGraph}. |
| * @return This builder so that method invocations may be chained. |
| */ |
| public Builder setChildNodeId(String childNodeId) { |
| this.childNodeId = childNodeId; |
| return this; |
| } |
| |
| public String getChildNodeId() { |
| return childNodeId; |
| } |
| |
| /** |
| * Set the parent node of this {@link ConstructGraph}. |
| * |
| * @param parentNodeId - The the parent node of this {@link ConstructGraph}. |
| * @return This builder so that method invocations may be chained. |
| */ |
| public Builder setParentNodeId(String parentNodeId) { |
| this.parentNodeId = parentNodeId; |
| return this; |
| } |
| |
| /** |
| * @return An instance of {@link ConstructQueryMetadata} build using |
| * this builder's values. |
| */ |
| public ConstructQueryMetadata build() { |
| return new ConstructQueryMetadata(nodeId, parentNodeId, childNodeId, varOrder, graph); |
| } |
| } |
| |
| } |