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1 /** |
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2 * Copyright (c) 2012, Ben Fortuna |
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3 * All rights reserved. |
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4 * |
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5 * Redistribution and use in source and binary forms, with or without |
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6 * modification, are permitted provided that the following conditions |
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7 * are met: |
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8 * |
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9 * o Redistributions of source code must retain the above copyright |
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10 * notice, this list of conditions and the following disclaimer. |
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11 * |
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12 * o Redistributions in binary form must reproduce the above copyright |
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13 * notice, this list of conditions and the following disclaimer in the |
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14 * documentation and/or other materials provided with the distribution. |
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15 * |
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16 * o Neither the name of Ben Fortuna nor the names of any other contributors |
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17 * may be used to endorse or promote products derived from this software |
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18 * without specific prior written permission. |
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19 * |
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20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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31 */ |
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32 package net.fortuna.ical4j.util; |
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33 |
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34 import net.fortuna.ical4j.model.ComponentList; |
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35 import net.fortuna.ical4j.model.ValidationException; |
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36 |
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37 /** |
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38 * @author Ben |
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39 * |
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40 */ |
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41 public final class ComponentValidator { |
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42 |
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43 private static final String ASSERT_NONE_MESSAGE = "Component [{0}] is not applicable"; |
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44 |
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45 private static final String ASSERT_ONE_OR_LESS_MESSAGE = "Component [{0}] must only be specified once"; |
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46 |
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47 /** |
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48 * Constructor made private to enforce static nature. |
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49 */ |
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50 private ComponentValidator() { |
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51 } |
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52 |
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53 /** |
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54 * @param componentName a component name used in the assertion |
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55 * @param components a list of components |
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56 * @throws ValidationException where the assertion fails |
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57 */ |
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58 public static void assertNone(String componentName, ComponentList components) throws ValidationException { |
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59 if (components.getComponent(componentName) != null) { |
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60 throw new ValidationException(ASSERT_NONE_MESSAGE, new Object[] {componentName}); |
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61 } |
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62 } |
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63 |
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64 /** |
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65 * @param componentName a component name used in the assertion |
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66 * @param components a list of components |
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67 * @throws ValidationException where the assertion fails |
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68 */ |
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69 public static void assertOneOrLess(String componentName, ComponentList components) throws ValidationException { |
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70 if (components.getComponents(componentName).size() > 1) { |
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71 throw new ValidationException(ASSERT_ONE_OR_LESS_MESSAGE, new Object[] {componentName}); |
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72 } |
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73 } |
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74 } |