/*
* 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 org.openrdf.model.Value;
import org.openrdf.model.impl.BNodeImpl;
import org.openrdf.model.impl.LiteralImpl;
import org.openrdf.model.impl.ValueFactoryImpl;
/**
* 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:
try {
return ValueFactoryImpl.getInstance().createURI(value);
} catch (IllegalArgumentException iae) {
throw new IllegalArgumentException(
String.format("Expected a valid URI for object template, found '%s'", value),
iae
);
}
case bnode:
return new BNodeImpl(value);
case literal:
return new LiteralImpl(value);
default:
throw new IllegalStateException();
}
}
@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();
}
}
}