/*
* Copyright 2011 Revelytix Inc.
*
* Licensed 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 spark.spi.rdf;
import java.net.URI;
import spark.api.rdf.TypedLiteral;
/**
* Basic implementation of {@link TypedLiteral}.
*
* toString as: "25"^^<http://www.w3.org/2001/XMLSchema#int>
*/
public class TypedLiteralImpl implements TypedLiteral {
private final String lexical;
private final URI dataType;
/**
* Construct a TypedLiteralImpl with a lexical representation and dataType,
* both required.
* @param lexical Lexical representation, must be non-null
* @param dataType XSD data type, must be non-null
* @throws NullPointerException If parameters are null
*/
public TypedLiteralImpl(String lexical, URI dataType) {
if(lexical == null) {
throw new NullPointerException("Plain literals must have non-null lexical values.");
}
if(dataType == null) {
throw new NullPointerException("Plain literals must have non-null data types.");
}
this.lexical = lexical;
this.dataType = dataType;
}
@Override
public URI getDataType() {
return this.dataType;
}
@Override
public String getLexical() {
return this.lexical;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((dataType == null) ? 0 : dataType.hashCode());
result = prime * result + ((lexical == null) ? 0 : lexical.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (!(obj instanceof TypedLiteral))
return false;
TypedLiteral other = (TypedLiteral) obj;
if (dataType == null) {
if (other.getDataType() != null)
return false;
} else if (!dataType.equals(other.getDataType()))
return false;
if (lexical == null) {
if (other.getLexical() != null)
return false;
} else if (!lexical.equals(other.getLexical()))
return false;
return true;
}
@Override
public String toString() {
return "\"" + lexical + "\"^^<" + dataType.toString() + ">";
}
}