package com.google.gwt.sample.simplexml.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Response;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HTMLTable;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TabPanel;
import com.google.gwt.xml.client.Document;
import com.google.gwt.xml.client.Element;
import com.google.gwt.xml.client.Node;
import com.google.gwt.xml.client.NodeList;
import com.google.gwt.xml.client.XMLParser;
public class SimpleXML implements EntryPoint {
private static final String XML_LABEL_STYLE = "xmlLabel";
private static final String USER_TABLE_LABEL_STYLE = "userTableLabel";
private static final String USER_TABLE_STYLE = "userTable";
private static final String NOTES_STYLE = "notes";
public void onModuleLoad() {
RequestBuilder requestBuilder = new
RequestBuilder(RequestBuilder.GET,"customerRecord.xml");
try {
requestBuilder.sendRequest(null, new RequestCallback() {
public void onError(Request request, Throwable exception) {
requestFailed(exception);
}
public void onResponseReceived(Request request, Response response) {
renderXML(response.getText());
}
});
} catch (RequestException ex) {
requestFailed(ex);
}
}
private FlexTable createOrderTable(FlowPanel xmlParsed, String label){
HTML orderTableLabel = new HTML("<h2>" + label);
xmlParsed.add(orderTableLabel);
FlexTable orderTable = new FlexTable();
orderTable.setStyleName(USER_TABLE_STYLE);
orderTable.setBorderWidth(3);
orderTable.getRowFormatter().setStyleName(0, USER_TABLE_LABEL_STYLE);
orderTable.setText(0, 0, "Employee ID");
orderTable.setText(0, 1, "Firstname");
orderTable.setText(0, 2, "Lastname");
orderTable.setText(0, 3, "City");
orderTable.setText(0, 4, "State");
orderTable.setText(0, 5, "Zip");
xmlParsed.add(orderTable);
return orderTable;
}
private void customerPane(String xmlText, FlowPanel xmlParsed) {
Document customerDom = XMLParser.parse(xmlText);
Element customerElement = customerDom.getDocumentElement();
XMLParser.removeWhitespace(customerElement);
String nameValue = getElementTextValue(customerElement, "name");
String title = "<h1>" + nameValue + "</h1>";
HTML titleHTML = new HTML(title);
xmlParsed.add(titleHTML);
String notesValue = getElementTextValue(customerElement, "notes");
Label notesText = new Label();
notesText.setStyleName(NOTES_STYLE);
notesText.setText(notesValue);
xmlParsed.add(notesText);
FlexTable pendingTable = createOrderTable(xmlParsed, "Employee Details");
NodeList orders = customerElement.getElementsByTagName("order");
int pendingRowPos = 0;
int completedRowPos = 0;
System.out.println(orders.getLength());
for (int i = 0; i < orders.getLength(); i++) {
Element order = (Element) orders.item(i);
HTMLTable table;
int rowPos;
if (order.getAttribute("status").equals("pending")) {
table = pendingTable;
rowPos = ++pendingRowPos;
} else {
table = pendingTable;
rowPos = ++pendingRowPos;
}
int columnPos = 0;
fillInOrderTableRow(customerElement, order, table, rowPos, columnPos);
}
}
private void fillInOrderTableRow(Element customerElement, Element order,
HTMLTable table, int rowPos, int columnPos) {
String orderId = order.getAttribute("id");
table.setText(rowPos, columnPos++, orderId);
Element item = (Element) order.getElementsByTagName("item").item(0);
String itemUPC = item.getAttribute("Firstname");
String itemName = item.getFirstChild().getNodeValue();
Label itemLabel = new Label(itemUPC);
itemLabel.setTitle(itemName);
table.setWidget(rowPos, columnPos++, itemLabel);
String orderedOnValue = getElementTextValue(customerElement, "Lastname");
table.setText(rowPos, columnPos++, orderedOnValue);
Element address = (Element) order.getElementsByTagName("address").item(0);
XMLParser.removeWhitespace(address);
NodeList lst = address.getChildNodes();
for (int j = 0; j < lst.getLength(); j++) {
Element next = (Element) lst.item(j);
String addressPartText = next.getFirstChild().getNodeValue();
table.setText(rowPos, columnPos++, addressPartText);
}
}
private String getElementTextValue
(Element parent, String elementTag) {
return parent.getElementsByTagName(elementTag)
.item(0).getFirstChild().getNodeValue();
}
private void renderXML(String xmlText) {
final TabPanel tab = new TabPanel();
final FlowPanel xmlSource = new FlowPanel();
final FlowPanel xmlParsed = new FlowPanel();
tab.add(xmlParsed, "Employee");
tab.add(xmlSource, "XML");
tab.selectTab(0);
RootPanel.get().add(tab);
xmlPane(xmlText, xmlSource);
customerPane(xmlText, xmlParsed);
}
private void requestFailed(Throwable exception) {
Window.alert("Failed to send the message: "
+ exception.getMessage());
}
private void xmlPane(String xmlText, final FlowPanel xmlSource) {
xmlText = xmlText.replaceAll("<", "<");
xmlText = xmlText.replaceAll(">", ">");
Label xml = new HTML("<pre>" + xmlText + "</pre>", false);
xml.setStyleName(XML_LABEL_STYLE);
xmlSource.add(xml);
}
}
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