DataForm.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.packet;
import org.jivesoftware.smack.packet.Element;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.packet.ExtensionElement;
import org.jivesoftware.smack.util.XmlStringBuilder;
import org.jivesoftware.smackx.xdata.FormField;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
/**
* Represents a form that could be use for gathering data as well as for reporting data
* returned from a search.
*
* @author Gaston Dombiak
*/
public class DataForm implements ExtensionElement {
public static final String NAMESPACE = "jabber:x:data";
public static final String ELEMENT = "x";
public enum Type {
/**
* This packet contains a form to fill out. Display it to the user (if your program can).
*/
form,
/**
* The form is filled out, and this is the data that is being returned from the form.
*/
submit,
/**
* The form was cancelled. Tell the asker that piece of information.
*/
cancel,
/**
* Data results being returned from a search, or some other query.
*/
result,
;
public static Type fromString(String string) {
return Type.valueOf(string.toLowerCase(Locale.US));
}
}
private Type type;
private String title;
private List<String> instructions = new ArrayList<String>();
private ReportedData reportedData;
private final List<Item> items = new ArrayList<Item>();
private final List<FormField> fields = new ArrayList<FormField>();
private final List<Element> extensionElements = new ArrayList<Element>();
public DataForm(Type type) {
this.type = type;
}
/**
* Returns the meaning of the data within the context. The data could be part of a form
* to fill out, a form submission or data results.
*
* @return the form's type.
*/
public Type getType() {
return type;
}
/**
* Returns the description of the data. It is similar to the title on a web page or an X
* window. You can put a <title/> on either a form to fill out, or a set of data results.
*
* @return description of the data.
*/
public String getTitle() {
return title;
}
/**
* Returns a List of the list of instructions that explain how to fill out the form and
* what the form is about. The dataform could include multiple instructions since each
* instruction could not contain newlines characters. Join the instructions together in order
* to show them to the user.
*
* @return a List of the list of instructions that explain how to fill out the form.
*/
public List<String> getInstructions() {
synchronized (instructions) {
return Collections.unmodifiableList(new ArrayList<String>(instructions));
}
}
/**
* Returns the fields that will be returned from a search.
*
* @return fields that will be returned from a search.
*/
public ReportedData getReportedData() {
return reportedData;
}
/**
* Returns a List of the items returned from a search.
*
* @return a List of the items returned from a search.
*/
public List<Item> getItems() {
synchronized (items) {
return Collections.unmodifiableList(new ArrayList<Item>(items));
}
}
/**
* Returns a List of the fields that are part of the form.
*
* @return a List of the fields that are part of the form.
*/
public List<FormField> getFields() {
synchronized (fields) {
return Collections.unmodifiableList(new ArrayList<FormField>(fields));
}
}
/**
* Return the form field with the given variable name or null.
*
* @param variableName
* @return the form field or null.
* @since 4.1
*/
public FormField getField(String variableName) {
synchronized (fields) {
for (FormField field : fields) {
if (variableName.equals(field.getVariable())) {
return field;
}
}
}
return null;
}
public String getElementName() {
return ELEMENT;
}
public String getNamespace() {
return NAMESPACE;
}
/**
* Sets the description of the data. It is similar to the title on a web page or an X window.
* You can put a <title/> on either a form to fill out, or a set of data results.
*
* @param title description of the data.
*/
public void setTitle(String title) {
this.title = title;
}
/**
* Sets the list of instructions that explain how to fill out the form and what the form is
* about. The dataform could include multiple instructions since each instruction could not
* contain newlines characters.
*
* @param instructions list of instructions that explain how to fill out the form.
*/
public void setInstructions(List<String> instructions) {
this.instructions = instructions;
}
/**
* Sets the fields that will be returned from a search.
*
* @param reportedData the fields that will be returned from a search.
*/
public void setReportedData(ReportedData reportedData) {
this.reportedData = reportedData;
}
/**
* Adds a new field as part of the form.
*
* @param field the field to add to the form.
*/
public void addField(FormField field) {
String fieldVariableName = field.getVariable();
if (fieldVariableName != null && getField(fieldVariableName) != null) {
throw new IllegalArgumentException("This data form already contains a form field with the variable name '"
+ fieldVariableName + "'");
}
synchronized (fields) {
fields.add(field);
}
}
/**
* Adds a new instruction to the list of instructions that explain how to fill out the form
* and what the form is about. The dataform could include multiple instructions since each
* instruction could not contain newlines characters.
*
* @param instruction the new instruction that explain how to fill out the form.
*/
public void addInstruction(String instruction) {
synchronized (instructions) {
instructions.add(instruction);
}
}
/**
* Adds a new item returned from a search.
*
* @param item the item returned from a search.
*/
public void addItem(Item item) {
synchronized (items) {
items.add(item);
}
}
public void addExtensionElement(Element element) {
extensionElements.add(element);
}
public List<Element> getExtensionElements() {
return Collections.unmodifiableList(extensionElements);
}
/**
* Returns the hidden FORM_TYPE field or null if this data form has none.
*
* @return the hidden FORM_TYPE field or null.
* @since 4.1
*/
public FormField getHiddenFormTypeField() {
FormField field = getField(FormField.FORM_TYPE);
if (field != null && field.getType() == FormField.Type.hidden) {
return field;
}
return null;
}
/**
* Returns true if this DataForm has at least one FORM_TYPE field which is
* hidden. This method is used for sanity checks.
*
* @return true if there is at least one field which is hidden.
*/
public boolean hasHiddenFormTypeField() {
return getHiddenFormTypeField() != null;
}
@Override
public XmlStringBuilder toXML() {
XmlStringBuilder buf = new XmlStringBuilder(this);
buf.attribute("type", getType());
buf.rightAngleBracket();
buf.optElement("title", getTitle());
for (String instruction : getInstructions()) {
buf.element("instructions", instruction);
}
// Append the list of fields returned from a search
if (getReportedData() != null) {
buf.append(getReportedData().toXML());
}
// Loop through all the items returned from a search and append them to the string buffer
for (Item item : getItems()) {
buf.append(item.toXML());
}
// Loop through all the form fields and append them to the string buffer
for (FormField field : getFields()) {
buf.append(field.toXML());
}
for (Element element : extensionElements) {
buf.append(element.toXML());
}
buf.closeElement(this);
return buf;
}
/**
*
* @param packet
* @return the DataForm or null
*/
public static DataForm from(Stanza packet) {
return (DataForm) packet.getExtension(ELEMENT, NAMESPACE);
}
/**
*
* Represents the fields that will be returned from a search. This information is useful when
* you try to use the jabber:iq:search namespace to return dynamic form information.
*
* @author Gaston Dombiak
*/
public static class ReportedData {
public static final String ELEMENT = "reported";
private List<FormField> fields = new ArrayList<FormField>();
public ReportedData(List<FormField> fields) {
this.fields = fields;
}
/**
* Returns the fields returned from a search.
*
* @return the fields returned from a search.
*/
public List<FormField> getFields() {
return Collections.unmodifiableList(new ArrayList<FormField>(fields));
}
public CharSequence toXML() {
XmlStringBuilder buf = new XmlStringBuilder();
buf.openElement(ELEMENT);
// Loop through all the form items and append them to the string buffer
for (FormField field : getFields()) {
buf.append(field.toXML());
}
buf.closeElement(ELEMENT);
return buf;
}
}
/**
*
* Represents items of reported data.
*
* @author Gaston Dombiak
*/
public static class Item {
public static final String ELEMENT = "item";
private List<FormField> fields = new ArrayList<FormField>();
public Item(List<FormField> fields) {
this.fields = fields;
}
/**
* Returns the fields that define the data that goes with the item.
*
* @return the fields that define the data that goes with the item.
*/
public List<FormField> getFields() {
return Collections.unmodifiableList(new ArrayList<FormField>(fields));
}
public CharSequence toXML() {
XmlStringBuilder buf = new XmlStringBuilder();
buf.openElement(ELEMENT);
// Loop through all the form items and append them to the string buffer
for (FormField field : getFields()) {
buf.append(field.toXML());
}
buf.closeElement(ELEMENT);
return buf;
}
}
}