1 | /*
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2 | * Copyright 2002-2004 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
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14 | * limitations under the License.
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15 | *
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16 | */
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17 |
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18 | package org.apache.tools.ant.types.selectors;
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19 |
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20 |
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21 | /**
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22 | * This selector has one other selectors whose meaning it inverts. It
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23 | * actually relies on NoneSelector for its implementation of the
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24 | * isSelected() method, but it adds a check to ensure there is only one
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25 | * other selector contained within.
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26 | *
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27 | * @since 1.5
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28 | */
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29 | public class NotSelector extends NoneSelector {
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30 |
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31 | /**
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32 | * Default constructor.
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33 | */
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34 | public NotSelector() {
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35 | }
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36 |
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37 | /**
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38 | * @return a string representation of the selector
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39 | */
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40 | public String toString() {
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41 | StringBuffer buf = new StringBuffer();
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42 | if (hasSelectors()) {
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43 | buf.append("{notselect: ");
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44 | buf.append(super.toString());
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45 | buf.append("}");
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46 | }
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47 | return buf.toString();
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48 | }
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49 |
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50 | /**
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51 | * Makes sure that there is only one entry, sets an error message if
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52 | * not.
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53 | */
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54 | public void verifySettings() {
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55 | if (selectorCount() != 1) {
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56 | setError("One and only one selector is allowed within the "
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57 | + "<not> tag");
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58 | }
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59 | }
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60 |
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61 | }
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62 |
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