/**
* Copyright 2006 Webmedia Group Ltd.
*
* 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.
**/
package org.araneaframework.backend.list.memorybased.expression.logical;
import java.util.Iterator;
import org.araneaframework.backend.list.memorybased.Expression;
import org.araneaframework.backend.list.memorybased.ExpressionEvaluationException;
import org.araneaframework.backend.list.memorybased.expression.MultiExpression;
import org.araneaframework.backend.list.memorybased.expression.VariableResolver;
public class AndExpression extends MultiExpression {
private static final long serialVersionUID = 1L;
public Object evaluate(VariableResolver resolver)
throws ExpressionEvaluationException {
if (this.children.size() == 0) {
throw new ExpressionEvaluationException(
"At least one children must be provided");
}
for (Iterator i = this.children.iterator(); i.hasNext();) {
Expression expr = (Expression) i.next();
Boolean value = (Boolean) expr.evaluate(resolver);
if (Boolean.FALSE.equals(value)) {
return Boolean.FALSE;
}
}
return Boolean.TRUE;
}
}