/*
* Copyright (C) 2009 JavaRosa
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package org.openrosa.client.jr.core.model.data;
import java.io.IOException;
import java.util.Vector;
import org.openrosa.client.java.io.DataInputStream;
import org.openrosa.client.java.io.DataOutputStream;
import org.openrosa.client.jr.core.model.data.helper.Selection;
import org.openrosa.client.jr.core.util.externalizable.DeserializationException;
import org.openrosa.client.jr.core.util.externalizable.ExtUtil;
import org.openrosa.client.jr.core.util.externalizable.ExtWrapList;
import org.openrosa.client.jr.core.util.externalizable.PrototypeFactory;
/**
* A response to a question requesting a selection of
* any number of items from a list.
*
* @author Drew Roos
*
*/
public class SelectMultiData implements IAnswerData {
Vector vs; //vector of Selection
/**
* Empty Constructor, necessary for dynamic construction during deserialization.
* Shouldn't be used otherwise.
*/
public SelectMultiData() {
}
public SelectMultiData (Vector vs) {
setValue(vs);
}
public IAnswerData clone () {
Vector v = new Vector();
for (int i = 0; i < vs.size(); i++) {
v.addElement(((Selection)vs.elementAt(i)).clone());
}
return new SelectMultiData(v);
}
/*
* (non-Javadoc)
* @see org.javarosa.core.model.data.IAnswerData#setValue(java.lang.Object)
*/
public void setValue (Object o) {
if(o == null) {
throw new NullPointerException("Attempt to set an IAnswerData class to null.");
}
vs = vectorCopy((Vector)o);
}
/*
* (non-Javadoc)
* @see org.javarosa.core.model.data.IAnswerData#getValue()
*/
public Object getValue () {
return vectorCopy(vs);
}
/**
* @return A type checked vector containing all of the elements
* contained in the vector input
* TODO: move to utility class
*/
private Vector vectorCopy(Vector input) {
Vector output = new Vector();
//validate type
for (int i = 0; i < input.size(); i++) {
Selection s = (Selection)input.elementAt(i);
output.addElement(s);
}
return output;
}
/**
* @return THE XMLVALUE!!
*/
/*
* (non-Javadoc)
* @see org.javarosa.core.model.data.IAnswerData#getDisplayText()
*/
public String getDisplayText () {
String str = "";
for (int i = 0; i < vs.size(); i++) {
Selection s = (Selection)vs.elementAt(i);
str += s.getValue();
if (i < vs.size() - 1)
str += ", ";
}
return str;
}
/* (non-Javadoc)
* @see org.javarosa.core.services.storage.utilities.Externalizable#readExternal(java.io.DataInputStream)
*/
public void readExternal(DataInputStream in, PrototypeFactory pf) throws IOException, DeserializationException {
vs = (Vector)ExtUtil.read(in, new ExtWrapList(Selection.class), pf);
}
/* (non-Javadoc)
* @see org.javarosa.core.services.storage.utilities.Externalizable#writeExternal(java.io.DataOutputStream)
*/
public void writeExternal(DataOutputStream out) throws IOException {
ExtUtil.write(out, new ExtWrapList(vs));
}
}