/*
* Copyright 2008 Fedora Commons
*
* 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.mulgara.sparql.parser.cst;
import java.util.ArrayList;
/**
* Represents an n-ary AND expression.
*
* @created Feb 13, 2008
* @author Paula Gearon
* @copyright © 2008 <a href="http://www.fedora-commons.org/">Fedora Commons</a>
* @licence <a href="{@docRoot}/../LICENCE.txt">Apache License, Version 2.0</a>
*/
public class AndExpression extends AbstractNaryOperator<LogicExpression> implements Node, LogicExpression {
/**
* Creates an AND expression from a pair of expressions
* @param e1 An existing AND expression
* @param e2 The expression to append to the AND
*/
public AndExpression(Expression e1, Expression e2) {
this((LogicExpression)e1, (LogicExpression)e2);
}
/**
* Creates an AND expression from a pair of expressions,
* appending the RHS if the LHS is already an AND expression
* @param e1 The LHS expression
* @param e2 The RHS expression
*/
public AndExpression(LogicExpression e1, LogicExpression e2) {
if (e1 instanceof AndExpression) {
operands = new ArrayList<LogicExpression>(((AndExpression)e1).operands);
assert operands.size() > 2;
} else {
operands = new ArrayList<LogicExpression>();
operands.add(e1);
}
operands.add(e2);
}
/**
* A string representation of the operator for this operator
* @return The operator as a string
*/
protected String getOperatorString() {
return "AND";
}
}