| /******************************************************************************* |
| * Copyright (c) 2005, 2010 Andrea Bittau, University College London, and others |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Andrea Bittau - initial API and implementation from the PsychoPath XPath 2.0 |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.ast; |
| |
| /** |
| * The comparison of expression operator takes the value of its left operand and |
| * compares (dependant on type) against its right operand, according to the |
| * rules of the particular comparison rule |
| */ |
| public class CmpExpr extends BinExpr { |
| /** |
| * Set internal value for EQUALS operation. |
| */ |
| public static final int EQUALS = 0; |
| /** |
| * Set internal value for NOTEQUALS operation. |
| */ |
| public static final int NOTEQUALS = 1; |
| /** |
| * Set internal value for LESSTHAN operation. |
| */ |
| public static final int LESSTHAN = 2; |
| /** |
| * Set internal value for LESSEQUAL operation. |
| */ |
| public static final int LESSEQUAL = 3; |
| /** |
| * Set internal value for GREATER operation. |
| */ |
| public static final int GREATER = 4; |
| /** |
| * Set internal value for GREATEREQUAL operation. |
| */ |
| public static final int GREATEREQUAL = 5; |
| /** |
| * Set internal value for EQ operation. |
| */ |
| public static final int EQ = 6; |
| /** |
| * Set internal value for NE operation. |
| */ |
| public static final int NE = 7; |
| /** |
| * Set internal value for LT operation. |
| */ |
| public static final int LT = 8; |
| /** |
| * Set internal value for LE operation. |
| */ |
| public static final int LE = 9; |
| /** |
| * Set internal value for GT operation. |
| */ |
| public static final int GT = 10; |
| /** |
| * Set internal value for GE operation. |
| */ |
| public static final int GE = 11; |
| /** |
| * Set internal value for IS operation. |
| */ |
| public static final int IS = 12; |
| /** |
| * Set internal value for LESS_LESS operation. |
| */ |
| public static final int LESS_LESS = 13; |
| /** |
| * Set internal value for GREATER_GREATER operation. |
| */ |
| public static final int GREATER_GREATER = 14; |
| |
| private int _type; |
| |
| /** |
| * Constructor for CmpExpr |
| * |
| * @param l |
| * input xpath left expression/variable |
| * @param r |
| * input xpath right expression/variable |
| * @param type |
| * what comparison to use l against r. |
| */ |
| public CmpExpr(Expr l, Expr r, int type) { |
| super(l, r); |
| |
| _type = type; |
| } |
| |
| /** |
| * Support for Visitor interface. |
| * |
| * @return Result of Visitor operation. |
| */ |
| public Object accept(XPathVisitor v) { |
| return v.visit(this); |
| } |
| |
| /** |
| * @return comparison type |
| */ |
| public int type() { |
| return _type; |
| } |
| } |