/*
* @(#)$Id: FnQName.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.qname;
import xbird.util.xml.XMLUtils;
import xbird.xquery.DynamicError;
import xbird.xquery.XQueryException;
import xbird.xquery.dm.value.Item;
import xbird.xquery.dm.value.Sequence;
import xbird.xquery.dm.value.literal.XString;
import xbird.xquery.dm.value.sequence.ValueSequence;
import xbird.xquery.dm.value.xsi.QNameValue;
import xbird.xquery.func.BuiltInFunction;
import xbird.xquery.func.FunctionSignature;
import xbird.xquery.meta.DynamicContext;
import xbird.xquery.misc.QNameUtil;
import xbird.xquery.misc.QNameTable.QualifiedName;
import xbird.xquery.type.Type;
import xbird.xquery.type.TypeRegistry;
import xbird.xquery.type.xs.QNameType;
import xbird.xquery.type.xs.StringType;
/**
* fn:QName($paramURI as xs:string?, $paramQName as xs:string) as xs:QName.
* <DIV lang="en">
* Returns an xs:QName with the namespace URI given in $paramURI.
* </DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
* @link http://www.w3.org/TR/xquery-operators/#func-QName
*/
public final class FnQName extends BuiltInFunction {
private static final long serialVersionUID = -5039857539055098831L;
public static final String SYMBOL = "fn:QName";
public FnQName() {
super(SYMBOL, QNameType.QNAME);
}
protected FunctionSignature[] signatures() {
final FunctionSignature[] s = new FunctionSignature[1];
s[0] = new FunctionSignature(getName(), new Type[] { TypeRegistry.safeGet("xs:string?"),
StringType.STRING });
return s;
}
public Sequence eval(Sequence<? extends Item> contextSeq, ValueSequence argv, DynamicContext dynEnv)
throws XQueryException {
assert (argv.size() == 2);
Item firstItem = argv.getItem(0);
Item secondItem = argv.getItem(1);
final String qname = ((XString) secondItem).getValue();
final String paramUri;
if(firstItem.isEmpty()) {
if(qname.indexOf(':') != -1) {
throw new DynamicError("err:FOCA0002", "Invalid qname: " + qname);
}
paramUri = XMLUtils.NULL_NS_URI;
} else {
paramUri = ((XString) firstItem).getValue();
}
final QualifiedName ret;
try {
ret = QNameUtil.parse(qname, paramUri);
} catch (Throwable e) {
throw new DynamicError("err:FOCA0002", "Incorrect lexical form for xs:QName: " + qname);
}
return new QNameValue(ret);
}
}