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16 package org.apache.commons.jxpath.ri.compiler;
17
18 import org.apache.commons.jxpath.ri.EvalContext;
19 import org.apache.commons.jxpath.ri.InfoSetUtil;
20
21 /***
22 * Implementation of Expression for the operation "<".
23 *
24 * @author Dmitri Plotnikov
25 * @version $Revision: 1.3 $ $Date: 2004/02/29 14:17:39 $
26 */
27 public class CoreOperationLessThan extends CoreOperation {
28
29 public CoreOperationLessThan(Expression arg1, Expression arg2) {
30 super(new Expression[] { arg1, arg2 });
31 }
32
33 public Object computeValue(EvalContext context) {
34 double l = InfoSetUtil.doubleValue(args[0].computeValue(context));
35 double r = InfoSetUtil.doubleValue(args[1].computeValue(context));
36 return l < r ? Boolean.TRUE : Boolean.FALSE;
37 }
38
39 protected int getPrecedence() {
40 return 3;
41 }
42
43 protected boolean isSymmetric() {
44 return false;
45 }
46
47 public String getSymbol() {
48 return "<";
49 }
50 }