| /* |
| * 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.any23.extractor.xpath; |
| |
| import java.util.Locale; |
| |
| import org.eclipse.rdf4j.model.Value; |
| import org.eclipse.rdf4j.model.impl.SimpleValueFactory; |
| |
| /** |
| * Represents a <i>Quad</i> object <i>template</i>. |
| * |
| * @author Michele Mostarda (mostarda@fbk.eu) |
| */ |
| public class TemplateObject extends Term { |
| |
| /** |
| * Supported object types. |
| */ |
| public enum Type { |
| URI, |
| BNODE, |
| LITERAL |
| } |
| |
| /** |
| * Current template type. |
| */ |
| private final Type type; |
| |
| /** |
| * Constructor. |
| * |
| * @param type object template type. |
| * @param value internal value. |
| * @param isVar if <code>true</code> it the given <code>value</code> |
| * will be resolved with the variable value. |
| */ |
| public TemplateObject(Type type, String value, boolean isVar) { |
| super(value, isVar); |
| if (type == null) { |
| throw new NullPointerException("object type cannot be null."); |
| } |
| this.type = type; |
| } |
| |
| @Override |
| protected Value getValueInternal(String value) { |
| switch (type) { |
| case URI: |
| return createIRI(value); |
| case BNODE: |
| return SimpleValueFactory.getInstance().createBNode(value); |
| case LITERAL: |
| return SimpleValueFactory.getInstance().createLiteral(value); |
| default: |
| throw new IllegalStateException(); |
| } |
| } |
| |
| private Value createIRI(String value) { |
| try { |
| return SimpleValueFactory.getInstance().createIRI(value); |
| } catch (IllegalArgumentException iae) { |
| throw new IllegalArgumentException( |
| String.format(Locale.ROOT, "Expected a valid IRI for object template, found '%s'", value), |
| iae |
| ); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| final String superStr = super.toString(); |
| switch (type) { |
| case URI: |
| return "<" + superStr + ">"; |
| case BNODE: |
| return "_:" + superStr; |
| case LITERAL: |
| return "'" + superStr + "'"; |
| default: |
| throw new IllegalStateException(); |
| } |
| } |
| |
| } |