org.openrdf.model.impl.URIImpl Maven / Gradle / Ivy
/* Sesame - Storage and Querying architecture for RDF and RDF Schema
* Copyright (C) 2001-2006 Aduna
*
* Contact:
* Aduna
* Prinses Julianaplein 14 b
* 3817 CS Amersfoort
* The Netherlands
* tel. +33 (0)33 465 99 87
* fax. +33 (0)33 465 99 87
*
* http://aduna-software.com/
* http://www.openrdf.org/
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.openrdf.model.impl;
import java.io.Serializable;
import org.openrdf.vocabulary.RDF;
import org.openrdf.vocabulary.RDFS;
import org.openrdf.model.GraphException;
import org.openrdf.model.URI;
import org.openrdf.model.Value;
import org.openrdf.sesame.sail.StatementIterator;
/**
* An implementation of the URI interface.
**/
public class URIImpl implements URI, Serializable {
/*------------------------------------------------------+
| Some static constants defining rdf and rdfs resources |
+------------------------------------------------------*/
// RDF
/** Constant URI for rdf:type **/
public static final URI RDF_TYPE = new URIImpl(RDF.TYPE);
/** Constant URI for rdf:Property **/
public static final URI RDF_PROPERTY = new URIImpl(RDF.PROPERTY);
/** Constant URI for rdf:XMLLiteral **/
public static final URI RDF_XMLLITERAL = new URIImpl(RDF.XMLLITERAL);
/** Constant URI for rdf:subject **/
public static final URI RDF_SUBJECT = new URIImpl(RDF.SUBJECT);
/** Constant URI for rdf:predicate **/
public static final URI RDF_PREDICATE = new URIImpl(RDF.PREDICATE);
/** Constant URI for rdf:object **/
public static final URI RDF_OBJECT = new URIImpl(RDF.OBJECT);
/** Constant URI for rdf:Statement **/
public static final URI RDF_STATEMENT = new URIImpl(RDF.STATEMENT);
/** Constant URI for rdf:Alt **/
public static final URI RDF_ALT = new URIImpl(RDF.ALT);
/** Constant URI for rdf:Bag **/
public static final URI RDF_BAG = new URIImpl(RDF.BAG);
/** Constant URI for rdf:Seq **/
public static final URI RDF_SEQ = new URIImpl(RDF.SEQ);
/** Constant URI for rdf:value **/
public static final URI RDF_VALUE = new URIImpl(RDF.VALUE);
/** Constant URI for rdf:List **/
public static final URI RDF_LIST = new URIImpl(RDF.LIST);
/** Constant URI for rdf:first **/
public static final URI RDF_FIRST = new URIImpl(RDF.FIRST);
/** Constant URI for rdf:rest **/
public static final URI RDF_REST = new URIImpl(RDF.REST);
/** Constant URI for rdf:nil **/
public static final URI RDF_NIL = new URIImpl(RDF.NIL);
// RDF Schema
/** Constant URI for rdfs:Resource **/
public static final URI RDFS_RESOURCE = new URIImpl(RDFS.RESOURCE);
/** Constant URI for rdfs:Class **/
public static final URI RDFS_CLASS = new URIImpl(RDFS.CLASS);
/** Constant URI for rdfs:Literal **/
public static final URI RDFS_LITERAL = new URIImpl(RDFS.LITERAL);
/** Constant URI for rdfs:subClassOf **/
public static final URI RDFS_SUBCLASSOF = new URIImpl(RDFS.SUBCLASSOF);
/** Constant URI for rdfs:subPropertyOf **/
public static final URI RDFS_SUBPROPERTYOF = new URIImpl(RDFS.SUBPROPERTYOF);
/** Constant URI for rdfs:domain **/
public static final URI RDFS_DOMAIN = new URIImpl(RDFS.DOMAIN);
/** Constant URI for rdfs:range **/
public static final URI RDFS_RANGE = new URIImpl(RDFS.RANGE);
/** Constant URI for rdfs:comment **/
public static final URI RDFS_COMMENT = new URIImpl(RDFS.COMMENT);
/** Constant URI for rdfs:label **/
public static final URI RDFS_LABEL = new URIImpl(RDFS.LABEL);
/** Constant URI for rdfs:isDefinedBy **/
public static final URI RDFS_ISDEFINEDBY = new URIImpl(RDFS.ISDEFINEDBY);
/** Constant URI for rdfs:seeAlso **/
public static final URI RDFS_SEEALSO = new URIImpl(RDFS.SEEALSO);
/** Constant URI for rdfs:Datatype **/
public static final URI RDFS_DATATYPE = new URIImpl(RDFS.DATATYPE);
/** Constant URI for rdfs:Container **/
public static final URI RDFS_CONTAINER = new URIImpl(RDFS.CONTAINER);
/** Constant URI for rdfs:member **/
public static final URI RDFS_MEMBER = new URIImpl(RDFS.MEMBER);
/** Constant URI for rdfs:ContainerMembershipProperty **/
public static final URI RDFS_CONTAINERMEMBERSHIPPROPERTY = new URIImpl(RDFS.CONTAINERMEMBERSHIPPROPERTY);
/*---------------------------------------+
| Variables |
+---------------------------------------*/
/** The namespace. **/
private String _namespace;
/** local name **/
private String _localName;
/*---------------------------------------+
| Constructors |
+---------------------------------------*/
/**
* Creates a new URI from the supplied string.
*
* @param uri A String representing a legal, absolute URI.
* @throws IllegalArgumentException If the supplied URI is not a
* legal (absolute) URI.
**/
public URIImpl(String uri) {
// Find the place to split the uri
int i = uri.length() - 1;
while (i >= 0) {
char c = uri.charAt(i);
if (c == '#' || c == ':' || c == '/') {
break;
}
i--;
}
if (i > 0) {
// Split the uri
_namespace = uri.substring(0, i + 1);
_localName = uri.substring(i + 1);
}
else {
throw new IllegalArgumentException("'"+uri+"' is not a legal (absolute) URI");
}
}
/**
* Creates a new URI that will get the supplied namespace and local name.
*
* @param namespace A namespace.
* @param localName A legal local name. A legal local name adheres to the definition of an NCName as specified at
* http://www.w3.org/TR/REC-xml-names/#NT-NCName.
**/
public URIImpl(String namespace, String localName) {
if (namespace == null) {
throw new IllegalArgumentException("namespace must not be null");
}
if (localName == null) {
throw new IllegalArgumentException("localName must not be null");
}
_namespace = namespace;
_localName = localName;
}
/*---------------------------------------+
| Methods |
+---------------------------------------*/
// inherit comments
public String getNamespace() {
return _namespace;
}
// inherit comments
public String getLocalName() {
return _localName;
}
// inherit comments
public String getURI() {
// This code is (much) more efficient then just concatenating the two strings.
char[] result = new char[_namespace.length() + _localName.length()];
_namespace.getChars(0, _namespace.length(), result, 0);
_localName.getChars(0, _localName.length(), result, _namespace.length());
return new String(result);
}
// implements URI.equals(Object)
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o instanceof URI) {
URI other = (URI)o;
return
_localName.equals(other.getLocalName()) &&
_namespace.equals(other.getNamespace());
}
return false;
}
// Implements URI.hashCode()
public int hashCode() {
return _namespace.hashCode() ^ _localName.hashCode();
}
/**
* Compares this URI with the supplied object.
*
* @throws ClassCastException if o is not of type Value
* @see java.lang.Comparable
**/
public int compareTo(Object o) {
if (this == o) {
return 0;
}
Value other = (Value)o;
if (other instanceof URI) {
return getURI().compareTo( ((URI)other).getURI() );
}
else {
// URI < BNode and URI < Literal
return -1;
}
}
/**
* Returns the String-representation of this URI.
**/
public String toString() {
return getURI();
}
// Implements URI.getPredicateStatements()
public StatementIterator getPredicateStatements()
throws GraphException
{
throw new GraphException("no backing store associated");
}
// Implements Resource.addProperty(URI, Value)
public void addProperty(URI property, Value value)
throws GraphException
{
throw new GraphException("no backing store associated");
}
// Implements Resource.getSubjectStatements()
public StatementIterator getSubjectStatements()
throws GraphException
{
throw new GraphException("no backing store associated");
}
// Implements Value.getObjectStatements()
public StatementIterator getObjectStatements()
throws GraphException
{
throw new GraphException("no backing store associated");
}
}
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