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| org.apache.commons.jexl.parser.ASTSubtractNode |
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| 1 | /* |
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| 2 | * Copyright 2002-2006 The Apache Software Foundation. |
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| 3 | * |
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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| 5 | * you may not use this file except in compliance with the License. |
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| 6 | * You may obtain a copy of the License at |
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| 7 | * |
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 9 | * |
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| 10 | * Unless required by applicable law or agreed to in writing, software |
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 13 | * See the License for the specific language governing permissions and |
|
| 14 | * limitations under the License. |
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| 15 | */ |
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| 16 | ||
| 17 | package org.apache.commons.jexl.parser; |
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| 18 | ||
| 19 | import org.apache.commons.jexl.util.Coercion; |
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| 20 | import org.apache.commons.jexl.JexlContext; |
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| 21 | ||
| 22 | /** |
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| 23 | * Subtraction. |
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| 24 | * |
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| 25 | * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> |
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| 26 | * @author <a href="mailto:mhw@kremvax.net">Mark H. Wilkinson</a> |
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| 27 | * @version $Id: ASTSubtractNode.java 398325 2006-04-30 12:34:29Z dion $ |
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| 28 | */ |
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| 29 | public class ASTSubtractNode extends SimpleNode { |
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| 30 | /** |
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| 31 | * Create the node given an id. |
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| 32 | * |
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| 33 | * @param id node id. |
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| 34 | */ |
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| 35 | public ASTSubtractNode(int id) { |
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| 36 | 0 | super(id); |
| 37 | 0 | } |
| 38 | ||
| 39 | /** |
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| 40 | * Create a node with the given parser and id. |
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| 41 | * |
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| 42 | * @param p a parser. |
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| 43 | * @param id node id. |
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| 44 | */ |
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| 45 | public ASTSubtractNode(Parser p, int id) { |
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| 46 | 7 | super(p, id); |
| 47 | 7 | } |
| 48 | ||
| 49 | /** {@inheritDoc} */ |
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| 50 | public Object value(JexlContext context) throws Exception { |
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| 51 | 7 | Object left = ((SimpleNode) jjtGetChild(0)).value(context); |
| 52 | 7 | Object right = ((SimpleNode) jjtGetChild(1)).value(context); |
| 53 | ||
| 54 | /* |
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| 55 | * the spec says 'and', I think 'or' |
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| 56 | */ |
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| 57 | 7 | if (left == null && right == class="keyword">null) { |
| 58 | 0 | return new Byte((byte) 0); |
| 59 | } |
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| 60 | ||
| 61 | /* |
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| 62 | * if anything is float, double or string with ( "." | "E" | "e") coerce |
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| 63 | * all to doubles and do it |
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| 64 | */ |
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| 65 | 7 | if (left instanceof Float |
| 66 | || left instanceof Double |
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| 67 | || right instanceof Float |
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| 68 | || right instanceof Double |
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| 69 | || (left instanceof String |
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| 70 | && (((String) left).indexOf(".") != -1 |
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| 71 | || ((String) left).indexOf("e") != -1 |
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| 72 | || ((String) left).indexOf("E") != -1)) |
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| 73 | || (right instanceof String |
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| 74 | && (((String) right).indexOf(".") != -1 |
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| 75 | || ((String) right).indexOf("e") != -1 |
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| 76 | || ((String) right).indexOf("E") != -1))) { |
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| 77 | 0 | Double l = Coercion.coerceDouble(left); |
| 78 | 0 | Double r = Coercion.coerceDouble(right); |
| 79 | ||
| 80 | 0 | return new Double(l.doubleValue() - r.doubleValue()); |
| 81 | } |
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| 82 | ||
| 83 | /* |
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| 84 | * otherwise to longs with thee! |
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| 85 | */ |
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| 86 | ||
| 87 | 7 | Long l = Coercion.coerceLong(left); |
| 88 | 7 | Long r = Coercion.coerceLong(right); |
| 89 | ||
| 90 | 7 | return new Long(l.longValue() - r.longValue()); |
| 91 | ||
| 92 | } |
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| 93 | ||
| 94 | /** {@inheritDoc} */ |
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| 95 | public Object jjtAccept(ParserVisitor visitor, Object data) { |
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| 96 | 0 | return visitor.visit(this, data); |
| 97 | } |
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| 98 | } |
| This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |