Java tutorial
/* * Copyright 2010 Zhihua (Dennis) Jiang * * 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 com.gwtmobile.persistence.client; import java.util.Date; import java.util.Map; import com.google.gwt.core.client.JavaScriptObject; import com.google.gwt.core.client.JsArray; public class Persistence { private static Boolean _autoAdd = true; static { initializeConsole(); } private static native void initializeConsole() /*-{ if (!$wnd.console) $wnd.console = {}; $wnd.console.log = $wnd.console.log || function(){}; $wnd.console.warn = $wnd.console.warn || function(){}; $wnd.console.error = $wnd.console.error || function(){}; $wnd.console.info = $wnd.console.info || function(){}; }-*/; public static Boolean getAutoAdd() { return _autoAdd; } public static void setAutoAdd(Boolean autoAdd) { _autoAdd = autoAdd; } public static native void connect(String dbname, String description, int size) /*-{ $wnd.persistence.store.websql.config($wnd.persistence, dbname, description, size); }-*/; public static JavaScriptObject define(String entityName, Map<String, String> fields) { JavaScriptObject assoArray = Map2AssociativeArray(fields); return define(entityName, assoArray); }; public static native void transaction(TransactionCallback callback) /*-{ $wnd.persistence.transaction( function(transaction) { callback.@com.gwtmobile.persistence.client.TransactionCallback::onSuccess(Lcom/gwtmobile/persistence/client/Transaction;)(transaction); } ); }-*/; public static native void schemaSync(TransactionCallback callback) /*-{ $wnd.persistence.schemaSync( function(transaction) { callback.@com.gwtmobile.persistence.client.TransactionCallback::onSuccess(Lcom/gwtmobile/persistence/client/Transaction;)(transaction); } ); }-*/; public static native void schemaSync(Callback callback) /*-{ $wnd.persistence.schemaSync( function(transaction) { callback.@com.gwtmobile.persistence.client.Callback::onSuccess()(); } ); }-*/; public static native void schemaSync() /*-{ $wnd.persistence.schemaSync(); }-*/; public static void add(Persistable persistable) { add(((PersistableInternal) persistable).getNativeObject()); } private static native void add(JavaScriptObject obj) /*-{ $wnd.persistence.add(obj); }-*/; public static void remove(Persistable persistable) { remove(((PersistableInternal) persistable).getNativeObject()); } private static native void remove(JavaScriptObject obj) /*-{ $wnd.persistence.remove(obj); }-*/; public static native void flush(Transaction transaction, Callback callback) /*-{ $wnd.persistence.flush(transaction, function() { callback.@com.gwtmobile.persistence.client.Callback::onSuccess()(); } ); }-*/; public static native void flush(Callback callback) /*-{ $wnd.persistence.flush(null, function() { callback.@com.gwtmobile.persistence.client.Callback::onSuccess()(); } ); }-*/; public static native void flush() /*-{ $wnd.persistence.flush(); }-*/; public static native void reset(Transaction transaction) /*-{ $wnd.persistence.reset(transaction); }-*/; public static native void reset() /*-{ $wnd.persistence.transaction(function (transaction) { $wnd.persistence.reset(transaction); }); }-*/; public static native void reset(Callback callback) /*-{ $wnd.persistence.reset( function() { callback.@com.gwtmobile.persistence.client.Callback::onSuccess()(); } ); }-*/; @SuppressWarnings("unchecked") public static void dumpToJson(Transaction transaction, Entity<?>[] entities, ScalarCallback<String> callback) { JsArray<JavaScriptObject> entitiesArray = null; if (entities != null) { entitiesArray = (JsArray<JavaScriptObject>) JavaScriptObject.createArray(); for (int i = 0; i < entities.length; i++) { EntityInternal<?> entity = (EntityInternal<?>) entities[i]; entitiesArray.set(i, entity.getNativeObject()); } } dumpToJsonNative(transaction, entitiesArray, callback); } public static void dumpToJson(Entity<?>[] entities, ScalarCallback<String> callback) { dumpToJson(null, entities, callback); } private static native void dumpToJsonNative(Transaction transaction, JsArray<JavaScriptObject> entities, ScalarCallback<String> callback) /*-{ $wnd.persistence.dumpToJson(transaction, entities, function(result) { @com.gwtmobile.persistence.client.Persistence::processStringCallback(Ljava/lang/String;Lcom/gwtmobile/persistence/client/ScalarCallback;)(result, callback); } ); }-*/; @SuppressWarnings("unused") private static void processStringCallback(String result, ScalarCallback<String> callback) { callback.onSuccess(result); } public static native void loadFromJson(Transaction transaction, String jsonDump, Callback callback) /*-{ $wnd.persistence.loadFromJson(transaction, jsonDump, function() { callback.@com.gwtmobile.persistence.client.Callback::onSuccess()(); } ); }-*/; private static JavaScriptObject Map2AssociativeArray(Map<String, String> fields) { JavaScriptObject assoArray = JavaScriptObject.createObject(); for (Map.Entry<String, String> field : fields.entrySet()) { setAssoArray(assoArray, field.getKey(), field.getValue()); } return assoArray; } private static native void setAssoArray(JavaScriptObject assoArray, String key, String value) /*-{ assoArray[key] = value; }-*/; public static native JavaScriptObject define(String entityName, JavaScriptObject fields) /*-{ return $wnd.persistence.define(entityName, fields); }-*/; public static Filter newPropertyFilter(String property, String operator, char value) { return newPropertyFilter(property, operator, new String(new char[] { value })); } public static native Filter newPropertyFilter(String property, String operator, String value) /*-{ return new $wnd.persistence.PropertyFilter(property, operator, value); }-*/; public static native Filter newPropertyFilter(String property, String operator, boolean value) /*-{ return new $wnd.persistence.PropertyFilter(property, operator, value); }-*/; public static native Filter newPropertyFilter(String property, String operator, int value) /*-{ return new $wnd.persistence.PropertyFilter(property, operator, value); }-*/; public static native Filter newPropertyFilter(String property, String operator, double value) /*-{ return new $wnd.persistence.PropertyFilter(property, operator, value); }-*/; public static Filter newPropertyFilter(String property, String operator, Date value) { return newPropertyFilter(property, operator, (double) value.getTime()); } public static native Filter newAndFilter(Filter filter1, Filter filter2) /*-{ return new $wnd.persistence.AndFilter(filter1, filter2); }-*/; public static native Filter newOrFilter(Filter filter1, Filter filter2) /*-{ return new $wnd.persistence.OrFilter(filter1, filter2); }-*/; }