01: /*
02: * Copyright 1999-2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16: /*
17: * $Id: FuncRound.java,v 1.11 2004/08/17 19:25:36 jycli Exp $
18: */
19: package org.apache.xpath.functions;
20:
21: import org.apache.xpath.XPathContext;
22: import org.apache.xpath.objects.XNumber;
23: import org.apache.xpath.objects.XObject;
24:
25: /**
26: * Execute the round() function.
27: * @xsl.usage advanced
28: */
29: public class FuncRound extends FunctionOneArg {
30: static final long serialVersionUID = -7970583902573826611L;
31:
32: /**
33: * Execute the function. The function must return
34: * a valid object.
35: * @param xctxt The current execution context.
36: * @return A valid XObject.
37: *
38: * @throws javax.xml.transform.TransformerException
39: */
40: public XObject execute(XPathContext xctxt)
41: throws javax.xml.transform.TransformerException {
42: final XObject obj = m_arg0.execute(xctxt);
43: final double val = obj.num();
44: if (val >= -0.5 && val < 0)
45: return new XNumber(-0.0);
46: if (val == 0.0)
47: return new XNumber(val);
48: return new XNumber(java.lang.Math.floor(val + 0.5));
49: }
50: }
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