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Smack/smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/provider/DataFormProvider.java
Florian Schmaus 4133eb175c Replace XPP3 by XmlPullParser interface wrapping StAX and XPP3
Introducing Smack's own XmlPullParser interface which tries to stay as
compatible as possible to XPP3. The interface is used to either wrap
StAX's XMLStreamReader if Smack is used on Java SE, and XPP3's
XmlPullParser if Smack is used on on Android.

Fixes SMACK-591.

Also introduce JUnit 5 and non-strict javadoc projects.
2019-05-06 22:10:50 +02:00

237 lines
8.9 KiB
Java

/**
*
* Copyright 2003-2007 Jive Software.
*
* 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.jivesoftware.smackx.xdata.provider;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.jivesoftware.smack.packet.XmlEnvironment;
import org.jivesoftware.smack.parsing.SmackParsingException;
import org.jivesoftware.smack.provider.ExtensionElementProvider;
import org.jivesoftware.smack.roster.packet.RosterPacket;
import org.jivesoftware.smack.roster.provider.RosterPacketProvider;
import org.jivesoftware.smack.xml.XmlPullParser;
import org.jivesoftware.smack.xml.XmlPullParserException;
import org.jivesoftware.smackx.xdata.FormField;
import org.jivesoftware.smackx.xdata.packet.DataForm;
import org.jivesoftware.smackx.xdatalayout.packet.DataLayout;
import org.jivesoftware.smackx.xdatalayout.provider.DataLayoutProvider;
import org.jivesoftware.smackx.xdatavalidation.packet.ValidateElement;
import org.jivesoftware.smackx.xdatavalidation.provider.DataValidationProvider;
/**
* The DataFormProvider parses DataForm packets.
*
* @author Gaston Dombiak
*/
public class DataFormProvider extends ExtensionElementProvider<DataForm> {
public static final DataFormProvider INSTANCE = new DataFormProvider();
@Override
public DataForm parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) throws XmlPullParserException, IOException, SmackParsingException {
DataForm.Type dataFormType = DataForm.Type.fromString(parser.getAttributeValue("", "type"));
DataForm dataForm = new DataForm(dataFormType);
outerloop: while (true) {
XmlPullParser.Event eventType = parser.next();
switch (eventType) {
case START_ELEMENT:
String name = parser.getName();
String namespace = parser.getNamespace();
switch (name) {
case "instructions":
dataForm.addInstruction(parser.nextText());
break;
case "title":
dataForm.setTitle(parser.nextText());
break;
case "field":
dataForm.addField(parseField(parser));
break;
case "item":
dataForm.addItem(parseItem(parser));
break;
case "reported":
dataForm.setReportedData(parseReported(parser));
break;
// See XEP-133 Example 32 for a corner case where the data form contains this extension.
case RosterPacket.ELEMENT:
if (namespace.equals(RosterPacket.NAMESPACE)) {
dataForm.addExtensionElement(RosterPacketProvider.INSTANCE.parse(parser));
}
break;
// See XEP-141 Data Forms Layout
case DataLayout.ELEMENT:
if (namespace.equals(DataLayout.NAMESPACE)) {
dataForm.addExtensionElement(DataLayoutProvider.parse(parser));
}
break;
}
break;
case END_ELEMENT:
if (parser.getDepth() == initialDepth) {
break outerloop;
}
break;
default:
// Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
break;
}
}
return dataForm;
}
private static FormField parseField(XmlPullParser parser) throws XmlPullParserException, IOException {
final int initialDepth = parser.getDepth();
final String var = parser.getAttributeValue("", "var");
final FormField.Type type = FormField.Type.fromString(parser.getAttributeValue("", "type"));
final FormField formField;
if (type == FormField.Type.fixed) {
formField = new FormField();
} else {
formField = new FormField(var);
formField.setType(type);
}
formField.setLabel(parser.getAttributeValue("", "label"));
outerloop: while (true) {
XmlPullParser.Event eventType = parser.next();
switch (eventType) {
case START_ELEMENT:
String name = parser.getName();
String namespace = parser.getNamespace();
switch (name) {
case "desc":
formField.setDescription(parser.nextText());
break;
case "value":
formField.addValue(parser.nextText());
break;
case "required":
formField.setRequired(true);
break;
case "option":
formField.addOption(parseOption(parser));
break;
// See XEP-122 Data Forms Validation
case ValidateElement.ELEMENT:
if (namespace.equals(ValidateElement.NAMESPACE)) {
formField.setValidateElement(DataValidationProvider.parse(parser));
}
break;
}
break;
case END_ELEMENT:
if (parser.getDepth() == initialDepth) {
break outerloop;
}
break;
default:
// Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
break;
}
}
return formField;
}
private static DataForm.Item parseItem(XmlPullParser parser) throws XmlPullParserException, IOException {
final int initialDepth = parser.getDepth();
List<FormField> fields = new ArrayList<>();
outerloop: while (true) {
XmlPullParser.Event eventType = parser.next();
switch (eventType) {
case START_ELEMENT:
String name = parser.getName();
switch (name) {
case "field":
fields.add(parseField(parser));
break;
}
break;
case END_ELEMENT:
if (parser.getDepth() == initialDepth) {
break outerloop;
}
break;
default:
// Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
break;
}
}
return new DataForm.Item(fields);
}
private static DataForm.ReportedData parseReported(XmlPullParser parser) throws XmlPullParserException, IOException {
final int initialDepth = parser.getDepth();
List<FormField> fields = new ArrayList<>();
outerloop: while (true) {
XmlPullParser.Event eventType = parser.next();
switch (eventType) {
case START_ELEMENT:
String name = parser.getName();
switch (name) {
case "field":
fields.add(parseField(parser));
break;
}
break;
case END_ELEMENT:
if (parser.getDepth() == initialDepth) {
break outerloop;
}
break;
default:
// Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
break;
}
}
return new DataForm.ReportedData(fields);
}
private static FormField.Option parseOption(XmlPullParser parser) throws XmlPullParserException, IOException {
final int initialDepth = parser.getDepth();
FormField.Option option = null;
String label = parser.getAttributeValue("", "label");
outerloop: while (true) {
XmlPullParser.Event eventType = parser.next();
switch (eventType) {
case START_ELEMENT:
String name = parser.getName();
switch (name) {
case "value":
option = new FormField.Option(label, parser.nextText());
break;
}
break;
case END_ELEMENT:
if (parser.getDepth() == initialDepth) {
break outerloop;
}
break;
default:
// Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
break;
}
}
return option;
}
}