/* * 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"; } }