/*
* @(#)$Id: OrExpr.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.logical;
import java.util.List;
import xbird.xquery.XQueryException;
import xbird.xquery.dm.value.Item;
import xbird.xquery.dm.value.Sequence;
import xbird.xquery.dm.value.xsi.BooleanValue;
import xbird.xquery.expr.BooleanOp;
import xbird.xquery.expr.XQExpression;
import xbird.xquery.func.seq.FnBoolean;
import xbird.xquery.meta.DynamicContext;
import xbird.xquery.meta.XQueryContext;
import xbird.xquery.parser.XQueryParserVisitor;
/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
*/
public class OrExpr extends LogicalExpr implements BooleanOp {
private static final long serialVersionUID = -1330815246394416449L;
public OrExpr(List<? extends XQExpression> exprs) {
super(exprs);
}
public OrExpr(XQExpression expr) {
super(expr);
}
public XQExpression visit(XQueryParserVisitor visitor, XQueryContext ctxt)
throws XQueryException {
return visitor.visit(this, ctxt);
}
public Sequence<? extends Item> eval(Sequence<? extends Item> contextSeq, DynamicContext dynEnv)
throws XQueryException {
for(XQExpression e : _exprs) {
Sequence s = e.eval(contextSeq, dynEnv);
if(FnBoolean.effectiveBooleanValue(s)) {
return BooleanValue.TRUE;
}
}
return BooleanValue.FALSE;
}
@Override
public String toString() {
final StringBuilder buf = new StringBuilder(256);
for(int i = 0; i < _exprs.size(); i++) {
if(i != 0) {
buf.append(" or ");
}
XQExpression e = _exprs.get(i);
buf.append(e.toString());
}
return buf.toString();
}
}