/*
* @(#)$Id: StaticBaseUri.java 3619 2008-03-26 07:23:03Z yui $
*
* Copyright 2006-2008 Makoto YUI
*
* 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.
*
* Contributors:
* Makoto YUI - initial implementation
*/
package xbird.xquery.func.context;
import java.net.URI;
import xbird.xquery.XQueryException;
import xbird.xquery.dm.value.Item;
import xbird.xquery.dm.value.Sequence;
import xbird.xquery.dm.value.sequence.ValueSequence;
import xbird.xquery.dm.value.xsi.AnyURIValue;
import xbird.xquery.func.BuiltInFunction;
import xbird.xquery.func.FunctionSignature;
import xbird.xquery.meta.DynamicContext;
import xbird.xquery.meta.StaticContext;
import xbird.xquery.type.TypeRegistry;
/**
* fn:static-base-uri() as xs:anyURI?.
* <DIV lang="en">
* Returns the value of the base-uri property from the static context.
* If the base-uri property is undefined, the empty sequence is returned.
* </DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
* @link http://www.w3.org/TR/xquery-operators/#func-static-base-uri
*/
public final class StaticBaseUri extends BuiltInFunction {
private static final long serialVersionUID = 8255110961585943164L;
public static final String SYMBOL = "fn:static-base-uri";
public StaticBaseUri() {
super(SYMBOL, TypeRegistry.safeGet("xs:anyURI?"));
this._evalPocily = EvaluationPolicy.eager;
}
protected FunctionSignature[] signatures() {
final FunctionSignature[] s = new FunctionSignature[1];
s[0] = new FunctionSignature(getName());
return s;
}
public Sequence eval(Sequence<? extends Item> contextSeq, ValueSequence argv, DynamicContext dynEnv)
throws XQueryException {
StaticContext sc = dynEnv.getStaticContext();
URI uri = sc.getBaseURI();
if(uri == null) {
return ValueSequence.EMPTY_SEQUENCE;
}
return new AnyURIValue(uri);
}
}