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.DynamicsElement;
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 dynamics elements to xml representations, and vice versa.
039: *
040: * @author <a href="mailto:markus.bois@web.de">Markus Bois</a>
041: * @version 1.02
042: */
043: public class DynamicsConverter extends
044: RecursiveInteractionModelConverter {
045: /**
046: * Creates a new converter.
047: *
048: * @param env DOCUMENT ME!
049: */
050: public DynamicsConverter(Environment env) {
051: super (env);
052: setSelectionInteractionModelConverter(new SelectionInteractionModelConverter(
053: env, "InteractionModelElements.Converters",
054: SelectionInteractionModelConverter.INIT_CUSTOM));
055: }
056:
057: /**
058: * Creates a new recursive converter
059: *
060: * @param env the enviroment
061: * @param selectionInteractionModelConverter the available converters
062: */
063: public DynamicsConverter(
064: Environment env,
065: SelectionInteractionModelConverter selectionInteractionModelConverter) {
066: super (env);
067: setSelectionInteractionModelConverter(selectionInteractionModelConverter);
068: }
069:
070: /**
071: * Returns whether this converter is able to transform the specified interaction-model element
072: * to an internal structure representation. This converter is responsible for the given
073: * structure element if it is of type {@link jacareto.interactionmodel.DynamicsElement}.
074: *
075: * @param element the interaction-model element
076: *
077: * @return <code>true</code> if this converter is responsible for the given structure element;
078: * otherwise <code>false</code>.
079: */
080: public boolean handlesElement(InteractionModelElement element) {
081: return (element != null) && element instanceof DynamicsElement;
082: }
083:
084: /**
085: * Converts the specified object to a structure object, if this converter is responsible for
086: * it. For responsibility see {@link #handlesElement(InteractionModelElement)}.
087: *
088: * @param element the interaction-model element to convert
089: *
090: * @return the structure object (which is a xml element)
091: */
092: public Object convertElement(InteractionModelElement element) {
093: DynamicsElement dynamicsElement = (DynamicsElement) element;
094: Iterator it = dynamicsElement.children();
095:
096: Element result = new Element("dynamics");
097:
098: while (it.hasNext()) {
099: InteractionModelElement next = (InteractionModelElement) it
100: .next();
101:
102: if ((next != null) && !(next instanceof DynamicsElement)) {
103: if (selectionInteractionModelConverter
104: .handlesElement(next)) {
105: Object toAdd = selectionInteractionModelConverter
106: .convertElement(next);
107:
108: if ((toAdd != null)
109: && !(next instanceof DynamicsElement)) {
110: result.addContent((Element) toAdd);
111: }
112: }
113: }
114: }
115:
116: return result;
117: }
118:
119: /**
120: * Returns whether this converter is able to transform the specified other representation (here
121: * a xml element) to a interaction-model element. This converter is responsible if the other
122: * representation is of type <code>jdom.org.Element</code> and the name of the element is
123: * "dynmacis"
124: *
125: * @param other the other representation
126: *
127: * @return <code>true</code> if this converter is responsible for the specified other
128: * representation; otherwise <code>false</code>.
129: */
130: public boolean handlesOther(Object other) {
131: try {
132: Element e = (Element) other;
133:
134: return e.getName().equals("dynamics");
135: } catch (Throwable t) {
136: return false;
137: }
138: }
139:
140: /**
141: * Converts the specified other representation to a interaction-model element, if this
142: * converter is responsible for it (reverses {@link
143: * #convertElement(InteractionModelElement)}). For responsibility see {@link
144: * #handlesOther(Object)}.
145: *
146: * @param other the other representation to convert
147: *
148: * @return the interaction-model element (of type {@link
149: * jacareto.interactionmodel.DynamicsElement})
150: */
151: public InteractionModelElement convertOther(Object other) {
152: Element element = (Element) other;
153: Vector children = new Vector();
154: Iterator iterator = element.getChildren("basic-interactions")
155: .iterator();
156:
157: while (iterator.hasNext()) {
158: Object internalRepresentation = iterator.next();
159:
160: if (selectionInteractionModelConverter
161: .handlesOther(internalRepresentation)) {
162: InteractionModelElement toAdd = selectionInteractionModelConverter
163: .convertOther(internalRepresentation);
164:
165: if (toAdd != null) {
166: children.addAll(InteractionModelElement
167: .arrayToVector(toAdd.getChildren()));
168: }
169: }
170: }
171:
172: return new DynamicsElement(env, InteractionModelElement
173: .vectorToArray(children));
174: }
175: }
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