| commit | author | age | ||
| ca8e1e | 1 | /* |
| U | 2 | Transit - Remote procedure calls made simple |
| 3 | Copyright (c) 2012 Ulrich Hilger | |
| 4 | ||
| 5 | This program is free software: you can redistribute it and/or modify | |
| 6 | it under the terms of the GNU Affero General Public License as published by | |
| 7 | the Free Software Foundation, either version 3 of the License, or | |
| 8 | (at your option) any later version. | |
| 9 | ||
| 10 | This program is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | GNU Affero General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Affero General Public License | |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 | */ | |
| 18 | ||
| 19 | package de.uhilger.transit; | |
| 20 | ||
| 21 | import java.util.List; | |
| 22 | ||
| 23 | import com.thoughtworks.xstream.XStream; | |
| 24 | import com.thoughtworks.xstream.io.xml.StaxDriver; | |
| 25 | ||
| 26 | public abstract class AbstractWandler implements Wandler { | |
| 27 | ||
| 28 | /** | |
| 29 | * Ein Java-Objekt in das Format verwandeln, das dieser Wandler | |
| 30 | * verarbeitet | |
| 31 | * | |
| 32 | * @param obj das Objekt, das verwandelt werden soll | |
| 33 | * @param typ der Datentyp, von dem verwandelt werden soll | |
| 34 | * @return das Objekt, in das das uebergebene Objekt verwandelt wurde | |
| 35 | */ | |
| 36 | public Object vonJava(Object obj, Class typ) { | |
| 37 | XStream xstream = getXStream(); | |
| 38 | aliasSubtypes(xstream, obj); | |
| 39 | xstream.alias(typ.getSimpleName(), typ); | |
| 40 | String xml = xstream.toXML(obj); | |
| 41 | return xml; | |
| 42 | } | |
| 43 | ||
| 44 | protected abstract XStream getXStream(); | |
| 45 | ||
| 46 | protected void aliasSubtypes(XStream xstream, Object obj) { | |
| 47 | if(obj instanceof List) { | |
| 48 | List list = (List) obj; | |
| 49 | if(list.size() > 0) { | |
| 50 | Object subobj = list.get(0); | |
| 51 | if(subobj instanceof List) { | |
| 52 | List sublist = (List) subobj; | |
| 53 | if(sublist.size() > 0) { | |
| 54 | Class subsubtyp = sublist.get(0).getClass(); | |
| 55 | xstream.alias(subsubtyp.getSimpleName(), subsubtyp); | |
| 56 | } | |
| 57 | } | |
| 58 | Class subtyp = list.get(0).getClass(); | |
| 59 | xstream.alias(subtyp.getSimpleName(), subtyp); | |
| 60 | } | |
| 61 | } | |
| 62 | } | |
| 63 | ||
| 64 | /** | |
| 65 | * Das Format, das dieser Wandler verarbeitet, zu Java wandeln | |
| 66 | * | |
| 67 | * @param obj das Objekt, das verwandelt werden soll | |
| 68 | * @param typ der Datentyp, in den verwandelt werden soll | |
| 69 | * @return das Objekt, in das das uebergebene Objekt verwandelt wurde | |
| 70 | */ | |
| 71 | public Object zuJava(Object obj, Class typ) { | |
| 72 | //XStream xstream = new XStream(new StaxDriver()); | |
| 73 | XStream xstream = getXStream(); | |
| 74 | xstream.alias(typ.getSimpleName(), typ); | |
| 75 | Object newObject = xstream.fromXML(obj.toString()); | |
| 76 | return newObject; | |
| 77 | } | |
| 78 | ||
| 79 | /** | |
| 80 | * Das Format ermitteln, das dieser Wandler verarbeitet | |
| 81 | * @return das Format, das dieser Wandler verarbeitet | |
| 82 | */ | |
| 83 | public abstract String getFormat(); | |
| 84 | ||
| 85 | /** | |
| 86 | * Pruefen, ob ein anderes Objekt gleich diesem Objekt ist | |
| 87 | * @param other das Objekt, mit dem dieses Objekt verglichen werden soll | |
| 88 | * @return true, wenn beide Objekte gleich sind, false wenn nicht | |
| 89 | */ | |
| 90 | public boolean equals(Object other) { | |
| 91 | boolean isEqual = false; | |
| 92 | if(other != null && other instanceof Wandler) { | |
| 93 | Wandler w = (Wandler) other; | |
| 94 | isEqual = this.getFormat().equals(w.getFormat()); | |
| 95 | } | |
| 96 | return isEqual; | |
| 97 | } | |
| 98 | ||
| 99 | public void aufloesen() { | |
| 100 | // hier muss bei diesem Wandler nichts geschehen | |
| 101 | } | |
| 102 | ||
| 103 | } | |
