1 | /*
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2 | * Licensed under the Apache License, Version 2.0 (the "License");
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3 | * you may not use this file except in compliance with the License.
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4 | * You may obtain a copy of the License at
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5 | *
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6 | * http://www.apache.org/licenses/LICENSE-2.0
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7 | *
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8 | * Unless required by applicable law or agreed to in writing, software
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9 | * distributed under the License is distributed on an "AS IS" BASIS,
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10 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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11 | * See the License for the specific language governing permissions and
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12 | * limitations under the License.
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13 | */
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14 |
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15 | package org.tp23.antinstaller.runtime.logic;
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16 |
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17 | import org.tp23.antinstaller.input.ResultContainer;
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18 | import org.tp23.antinstaller.runtime.ConfigurationException;
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19 |
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20 | /**
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21 | * @author mwilson
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22 | * @version $Id: SimpleExpression.java,v 1.1 2006/09/08 19:16:30 anothermwilson
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23 | * Exp $
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24 | * @since 0.7.4 patch 2
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25 | */
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26 | public class SimpleExpression implements Expression {
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27 |
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28 | private final Value value1;
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29 | private final ValuesTest testCondition;
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30 | private final Value value2;
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31 | private final String literalValue1;
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32 | private final String literalValue2;
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33 |
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34 | public SimpleExpression(
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35 | final ResultContainer resultContainer,
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36 | final String value1,
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37 | final ValuesTest test,
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38 | final String value2)
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39 | throws ConfigurationException {
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40 |
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41 | this.literalValue1 = value1;
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42 | this.value1 = getValue(resultContainer, value1);
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43 | this.testCondition = test;
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44 | this.literalValue2 = value2;
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45 | this.value2 = getValue(resultContainer, value2);
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46 |
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47 | }
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48 |
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49 | public boolean evaluate() {
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50 | return testCondition.getTestResult(value1, value2);
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51 | }
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52 |
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53 | private Value getValue(ResultContainer container, String valueStr) throws ConfigurationException {
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54 | if ( (valueStr.length() > 0) && (valueStr.charAt(0) == '$') ) {
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55 | if ( valueStr.startsWith("${") && valueStr.endsWith("}") ) {
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56 | return new VariableValue(container, valueStr);
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57 | } else {
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58 | throw new ConfigurationException("Badly formed variable: '" + valueStr + "'");
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59 | }
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60 | } else {
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61 | return new LiteralValue(valueStr);
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62 | }
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63 | }
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64 |
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65 | public String toString() {
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66 | return "[" + literalValue1 + "==" + literalValue2 + "]";
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67 | }
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68 | }
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