001: /*
002: * Jacareto Copyright (c) 2002-2005
003: * Applied Computer Science Research Group, Darmstadt University of
004: * Technology, Institute of Mathematics & Computer Science,
005: * Ludwigsburg University of Education, and Computer Based
006: * Learning Research Group, Aachen University. All rights reserved.
007: *
008: * Jacareto is free software; you can redistribute it and/or
009: * modify it under the terms of the GNU General Public
010: * License as published by the Free Software Foundation; either
011: * version 2 of the License, or (at your option) any later version.
012: *
013: * Jacareto is distributed in the hope that it will be useful,
014: * but WITHOUT ANY WARRANTY; without even the implied warranty of
015: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
016: * General Public License for more details.
017: *
018: * You should have received a copy of the GNU General Public
019: * License along with Jacareto; if not, write to the Free
020: * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
021: *
022: */
023:
024: package jacareto.convert.interactionmodel;
025:
026: import jacareto.convert.RecursiveInteractionModelConverter;
027: import jacareto.convert.SelectionInteractionModelConverter;
028: import jacareto.interactionmodel.BasicInteractionsElement;
029: import jacareto.interactionmodel.InteractionModelElement;
030: import jacareto.system.Environment;
031:
032: import org.jdom.Element;
033:
034: import java.util.Iterator;
035: import java.util.Vector;
036:
037: /**
038: * A converter which is able to convert basic interactions element to xml representations, and vice
039: * versa.
040: *
041: * @author <a href="mailto:markus.bois@epost.de">Markus Bois</a>
042: * @version 1.02
043: */
044: public class BasicInteractionsConverter extends
045: RecursiveInteractionModelConverter {
046: /**
047: * Creates a new converter.
048: *
049: * @param env DOCUMENT ME!
050: */
051: public BasicInteractionsConverter(Environment env) {
052: super (env);
053: setSelectionInteractionModelConverter(new SelectionInteractionModelConverter(
054: env, "InteractionModelElements.Converters",
055: SelectionInteractionModelConverter.INIT_CUSTOM));
056: }
057:
058: /**
059: * Creates a new recursive converter
060: *
061: * @param env the enviroment
062: * @param selectionInteractionModelConverter the available converters
063: */
064: public BasicInteractionsConverter(
065: Environment env,
066: SelectionInteractionModelConverter selectionInteractionModelConverter) {
067: super (env);
068: setSelectionInteractionModelConverter(selectionInteractionModelConverter);
069: }
070:
071: /**
072: * Returns whether this converter is able to transform the specified interaction-model element
073: * to an internal structure representation. This converter is responsible for the given
074: * interaction-model element if it is of type {@link
075: * jacareto.interactionmodel.BasicInteractionsElement}.
076: *
077: * @param element the interaction-model element
078: *
079: * @return <code>true</code> if this converter is responsible for the given interaction-model
080: * element; otherwise <code>false</code>.
081: */
082: public boolean handlesElement(InteractionModelElement element) {
083: return (element != null)
084: && element instanceof BasicInteractionsElement;
085: }
086:
087: /**
088: * Converts the specified object to a structure object, if this converter is responsible for
089: * it. For responsibility see {@link #handlesElement(InteractionModelElement)}.
090: *
091: * @param element the interaction-model element to convert
092: *
093: * @return the structure object (which is a xml element)
094: */
095: public Object convertElement(InteractionModelElement element) {
096: BasicInteractionsElement basicInteractionsElement = (BasicInteractionsElement) element;
097: Element result = new Element("BasicInteractions");
098: Iterator it = basicInteractionsElement.children();
099:
100: while (it.hasNext()) {
101: InteractionModelElement next = (InteractionModelElement) it
102: .next();
103:
104: if ((next != null)
105: && !(next instanceof BasicInteractionsElement)) {
106: if (selectionInteractionModelConverter
107: .handlesElement(next)) {
108: Object toAdd = selectionInteractionModelConverter
109: .convertElement(next);
110:
111: if ((toAdd != null)
112: && !(next instanceof BasicInteractionsElement)) {
113: result.addContent((Element) toAdd);
114: }
115: }
116: }
117: }
118:
119: return result;
120: }
121:
122: /**
123: * Returns whether this converter is able to transform the specified other representation (here
124: * a xml element) to a interaction-model element. This converter is responsible if the other
125: * representation is of type <code>jdom.org.Element</code> and the name of the element is
126: * "basic-interactions"
127: *
128: * @param other the other representation
129: *
130: * @return <code>true</code> if this converter is responsible for the specified other
131: * representation; otherwise <code>false</code>.
132: */
133: public boolean handlesOther(Object other) {
134: try {
135: Element e = (Element) other;
136:
137: return e.getName().equals("basic-interactions");
138: } catch (Throwable t) {
139: return false;
140: }
141: }
142:
143: /**
144: * Converts the specified other representation to a interaction-model element, if this
145: * converter is responsible for it (reverses {@link
146: * #convertElement(InteractionModelElement)}). For responsibility see {@link
147: * #handlesOther(Object)}.
148: *
149: * @param other the other representation to convert
150: *
151: * @return the interaction-model element (of type {@link
152: * jacareto.interactionmodel.BasicInteractionsElement})
153: */
154: public InteractionModelElement convertOther(Object other) {
155: Element element = (Element) other;
156: Vector children = new Vector();
157:
158: Iterator iterator = element.getChildren().iterator();
159:
160: while (iterator.hasNext()) {
161: Object internalRepresentation = iterator.next();
162:
163: if (selectionInteractionModelConverter
164: .handlesOther(internalRepresentation)) {
165: InteractionModelElement toAdd = selectionInteractionModelConverter
166: .convertOther(internalRepresentation);
167:
168: if (toAdd != null) {
169: children.add(toAdd);
170: }
171: }
172: }
173:
174: return new BasicInteractionsElement(env,
175: InteractionModelElement.vectorToArray(children));
176: }
177: }
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