/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-04 The eXist Project
* http://exist-db.org
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.xquery;
import org.exist.dom.DocumentSet;
import org.exist.xquery.util.Error;
import org.exist.xquery.util.ExpressionDumper;
import org.exist.xquery.value.Item;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
public class TreatAsExpression extends AbstractExpression {
private Expression expression;
private SequenceType type;
public TreatAsExpression(XQueryContext context, Expression expr, SequenceType type) {
super(context);
this.expression = expr;
this.type = type;
}
public Sequence eval(Sequence contextSequence, Item contextItem)
throws XPathException {
return expression.eval(contextSequence, contextItem);
}
public int returnsType() {
return type.getPrimaryType();
}
public int getCardinality() {
return type.getCardinality();
}
public int getDependencies() {
return expression.getDependencies();
}
public void analyze(AnalyzeContextInfo contextInfo) throws XPathException {
contextInfo.setParent(this);
expression.analyze(contextInfo);
expression = new DynamicCardinalityCheck(context, type.getCardinality(), expression,
new Error("XPDY0050", type.toString()));
expression = new DynamicTypeCheck(context, type.getPrimaryType(), expression);
}
public void dump(ExpressionDumper dumper) {
expression.dump(dumper);
dumper.display(" treat as ");
dumper.display(type.toString());
}
public void resetState(boolean postOptimization) {
super.resetState(postOptimization);
expression.resetState(postOptimization);
}
public void setContextDocSet(DocumentSet contextSet) {
super.setContextDocSet(contextSet);
expression.setContextDocSet(contextSet);
}
}