Java tutorial
/* * $Id$ * * Authors: * Jeff Buchbinder <jeff@freemedsoftware.org> * * FreeMED Electronic Medical Record and Practice Management System * Copyright (C) 1999-2012 FreeMED Software Foundation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ package org.freemedsoftware.gwt.client.widget; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Set; import org.freemedsoftware.gwt.client.HashSetter; import org.freemedsoftware.gwt.client.JsonUtil; import org.freemedsoftware.gwt.client.Util; import org.freemedsoftware.gwt.client.Util.ProgramMode; import org.freemedsoftware.gwt.client.Api.ModuleInterfaceAsync; import com.google.gwt.core.client.GWT; 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.URL; import com.google.gwt.json.client.JSONParser; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.SuggestOracle; import com.google.gwt.user.client.ui.SuggestOracle.Callback; import com.google.gwt.user.client.ui.SuggestOracle.Request; public class CustomModuleWidget extends AsyncPicklistWidgetBase implements HashSetter { protected String moduleName = null; protected String hashMapping = null; public CustomModuleWidget() { super(); } public CustomModuleWidget(String module) { // Load superclass constructor first... super(); setModuleName(module); } /** * Set value of current widget based on integer value, asynchronously. * * @param widgetValue */ public void setValue(Integer widgetValue) { value = widgetValue; } /** * Set text within search box. * * @param text */ public void setText(String text) { searchBox.setText(text); searchBox.setTitle(text); } /** * Set module class name. * * @param module */ public void setModuleName(String module) { moduleName = module; } protected void loadSuggestions(String req, final Request r, final Callback cb) { if (Util.getProgramMode() == ProgramMode.STUBBED) { // Handle in a stubbed sort of way List<SuggestOracle.Suggestion> items = new ArrayList<SuggestOracle.Suggestion>(); map.clear(); addKeyValuePair(items, new String("Hackenbush, Hugo Z"), new String("1")); addKeyValuePair(items, new String("Firefly, Rufus T"), new String("2")); cb.onSuggestionsReady(r, new SuggestOracle.Response(items)); } else if (Util.getProgramMode() == ProgramMode.JSONRPC) { String[] params = { req }; RequestBuilder builder = new RequestBuilder(RequestBuilder.POST, URL.encode(Util.getJsonRequest("org.freemedsoftware." + moduleName, params))); try { builder.sendRequest(null, new RequestCallback() { public void onError(com.google.gwt.http.client.Request request, Throwable ex) { } @SuppressWarnings("unchecked") public void onResponseReceived(com.google.gwt.http.client.Request request, com.google.gwt.http.client.Response response) { if (Util.checkValidSessionResponse(response.getText())) { if (200 == response.getStatusCode()) { HashMap<String, String> result = (HashMap<String, String>) JsonUtil.shoehornJson( JSONParser.parseStrict(response.getText()), "HashMap<String,String>"); if (result != null) { Set<String> keys = result.keySet(); Iterator<String> iter = keys.iterator(); List<SuggestOracle.Suggestion> items = new ArrayList<SuggestOracle.Suggestion>(); map.clear(); while (iter.hasNext()) { final String key = (String) iter.next(); final String val = (String) result.get(key); addKeyValuePair(items, val, key); } cb.onSuggestionsReady(r, new SuggestOracle.Response(items)); } else // if no result then set value to 0 setValue(0); } else { GWT.log("Result " + response.getStatusText(), null); } } } }); } catch (RequestException e) { GWT.log("Exception thrown: ", e); } } else { ModuleInterfaceAsync service = null; try { service = ((ModuleInterfaceAsync) Util .getProxy("org.freemedsoftware.gwt.client.Api.ModuleInterface")); } catch (Exception e) { } service.ModuleSupportPicklistMethod(moduleName, req, new AsyncCallback<HashMap<String, String>>() { public void onSuccess(HashMap<String, String> result) { Set<String> keys = result.keySet(); Iterator<String> iter = keys.iterator(); List<SuggestOracle.Suggestion> items = new ArrayList<SuggestOracle.Suggestion>(); map.clear(); while (iter.hasNext()) { final String key = (String) iter.next(); final String val = (String) result.get(key); addKeyValuePair(items, val, key); } cb.onSuggestionsReady(r, new SuggestOracle.Response(items)); } public void onFailure(Throwable t) { GWT.log("Exception thrown: ", t); } }); } } @Override public void getTextForValue(Integer val) { } public void setHashMapping(String hm) { hashMapping = hm; } public String getStoredValue() { return getValue().toString(); } public String getHashMapping() { return hashMapping; } public void setFromHash(HashMap<String, String> data) { setValue(Integer.parseInt(data.get(hashMapping))); } public void setEnable(boolean val) { textBox.setEnabled(val); } }