static{ public static void registerType(String type, Class c){ public static Object construct(String type, String value) throws EvaluationException{| Types | Line # 46 | 13 | 4 | 77.8% |
0.7777778
|
| No Tests | |||
| 1 | /* | |
| 2 | * Copyright (c) 2000-2005, University of Salford | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions are met: | |
| 7 | * | |
| 8 | * Redistributions of source code must retain the above copyright notice, this | |
| 9 | * list of conditions and the following disclaimer. | |
| 10 | * | |
| 11 | * Redistributions in binary form must reproduce the above copyright notice, | |
| 12 | * this list of conditions and the following disclaimer in the documentation | |
| 13 | * and/or other materials provided with the distribution. | |
| 14 | * | |
| 15 | * Neither the name of the University of Salford nor the names of its | |
| 16 | * contributors may be used to endorse or promote products derived from this | |
| 17 | * software without specific prior written permission. | |
| 18 | * | |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
| 23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 29 | * POSSIBILITY OF SUCH DAMAGE. | |
| 30 | */ | |
| 31 | ||
| 32 | package issrg.pba.rbac.xmlpolicy.ifstatement; | |
| 33 | ||
| 34 | /** | |
| 35 | * This class maintains a registry of known types, so that the string encoding | |
| 36 | * of the values of these types can be decoded from the XML Policy. When | |
| 37 | * registering the type, the impelementing class should have a constructor with | |
| 38 | * a single String parameter to it. | |
| 39 | * | |
| 40 | * <p>By default there are three types known: BOOLEAN_TYPE, INTEGER_TYPE and | |
| 41 | * STRING_TYPE ("Boolean", "Integer" and "String" respectively). | |
| 42 | * | |
| 43 | * @author A.Otenko | |
| 44 | */ | |
| 45 | ||
| 46 | public final class Types { | |
| 47 | protected final static java.util.Map knownTypes=new java.util.Hashtable(); | |
| 48 | ||
| 49 | public final static String INTEGER_TYPE = "Integer"; | |
| 50 | public final static String DOUBLE_TYPE = "Double"; | |
| 51 | public final static String BOOLEAN_TYPE = "Boolean"; | |
| 52 | public final static String STRING_TYPE = "String"; | |
| 53 | ||
| 54 | 21 |
static{ |
| 55 | 21 | registerType(INTEGER_TYPE, Integer.class); |
| 56 | 21 | registerType(DOUBLE_TYPE, Double.class); |
| 57 | 21 | registerType(BOOLEAN_TYPE, Boolean.class); |
| 58 | 21 | registerType(STRING_TYPE, String.class); |
| 59 | } | |
| 60 | ||
| 61 | /** | |
| 62 | * This method registers a class to be used to instantiate values of the | |
| 63 | * given type from String encoding. | |
| 64 | * | |
| 65 | * @param type - the type of the value | |
| 66 | * @param c - the Class that represents the values of that type; it must | |
| 67 | * have a public constructor with a single String argument | |
| 68 | */ | |
| 69 | 105 |
public static void registerType(String type, Class c){ |
| 70 | 105 | try{ |
| 71 | 105 | knownTypes.put(type, c.getConstructor(new Class[]{String.class})); |
| 72 | }catch (NoSuchMethodException nsme){ | |
| 73 | 0 | nsme.printStackTrace(); |
| 74 | } | |
| 75 | } | |
| 76 | ||
| 77 | /** | |
| 78 | * This is the method for building the objects of known types out of their | |
| 79 | * String encoding. | |
| 80 | * | |
| 81 | * @param type is the type of the object, as it appears in the XML Policy | |
| 82 | * @param value is the String encoding of the object | |
| 83 | * | |
| 84 | * @return the constructed type-specific Object | |
| 85 | * | |
| 86 | * @throws EvaluationException if the constructor is not found or the value | |
| 87 | * is not | |
| 88 | * properly encoded | |
| 89 | */ | |
| 90 | 89 |
public static Object construct(String type, String value) throws EvaluationException{ |
| 91 | 89 | try{ |
| 92 | 89 | java.lang.reflect.Constructor c = (java.lang.reflect.Constructor)(knownTypes.get(type)); |
| 93 | 0 | if (c==null) throw new EvaluationException("Could not build a value of type "+type+" out of \""+value+"\": no implementing Class found for this type"); |
| 94 | ||
| 95 | 89 | return c.newInstance(new Object[]{value}); |
| 96 | }catch (Throwable th){ | |
| 97 | 0 | throw new EvaluationException("Could not build a value of type "+type+" out of \""+value+"\"", th); |
| 98 | } | |
| 99 | } | |
| 100 | } | |
|
||||||||||
