/*
* @(#)$Id: NamespaceConstructor.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.expr.constructor;
import xbird.xquery.XQueryException;
import xbird.xquery.dm.XQEventReceiver;
import xbird.xquery.dm.instance.XQueryDataModel;
import xbird.xquery.dm.value.Item;
import xbird.xquery.dm.value.Sequence;
import xbird.xquery.dm.value.node.DMNamespace;
import xbird.xquery.expr.Evaluable;
import xbird.xquery.expr.XQExpression;
import xbird.xquery.meta.*;
import xbird.xquery.misc.QNameUtil;
import xbird.xquery.misc.QNameTable.QualifiedName;
import xbird.xquery.parser.XQueryParserVisitor;
import xbird.xquery.type.node.NamespaceTest;
/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
*/
public final class NamespaceConstructor extends AttributeConstructorBase implements Evaluable {
private static final long serialVersionUID = -2383782736555510488L;
private final String _prefix;
private QualifiedName _name = null;
public NamespaceConstructor(String prefix, String value) {
this._prefix = prefix;
this._value = value;
this._type = NamespaceTest.ANY_NAMESPACE;
}
public String getPrefix() {
return this._prefix;
}
public XQExpression visit(XQueryParserVisitor visitor, XQueryContext ctxt)
throws XQueryException {
return visitor.visit(this, ctxt);
}
public XQExpression staticAnalysis(StaticContext statEnv) throws XQueryException {
return this;
}
public QualifiedName processName(DynamicContext dynEnv) throws XQueryException {
if(this._name == null) {
final StaticContext sc = dynEnv.getStaticContext();
final QualifiedName name = QNameUtil.resolveNSAttrName(_prefix, sc.getStaticalyKnownNamespaces(), sc.getDefaultElementNamespace());
this._name = name;
}
return _name;
}
public DMNamespace eval(Sequence<? extends Item> contextSeq, DynamicContext dynEnv)
throws XQueryException {
return XQueryDataModel.createNamespace(processName(dynEnv), _value);
}
@Override
public void evalAsEvents(XQEventReceiver handler, Sequence<? extends Item> contextSeq, DynamicContext dynEnv)
throws XQueryException {
handler.evNamespace(_prefix, _value);
}
}