/*
* Copyright 2013 cruxframework.org.
*
* 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.cruxframework.crux.core.rebind.database;
import java.io.PrintWriter;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.cruxframework.crux.core.client.Crux;
import org.cruxframework.crux.core.client.db.Database;
import org.cruxframework.crux.core.client.db.DatabaseCallback;
import org.cruxframework.crux.core.client.db.DatabaseErrorHandler;
import org.cruxframework.crux.core.client.db.DatabaseRetrieveCallback;
import org.cruxframework.crux.core.client.db.KeyRange;
import org.cruxframework.crux.core.client.db.Transaction;
import org.cruxframework.crux.core.client.db.Transaction.TransactionCallback;
import org.cruxframework.crux.core.client.utils.StringUtils;
import org.cruxframework.crux.core.rebind.AbstractInterfaceWrapperProxyCreator;
import org.cruxframework.crux.core.rebind.CruxGeneratorException;
import org.cruxframework.crux.core.rebind.database.idb.IDBDatabaseProxyCreator;
import org.cruxframework.crux.core.rebind.database.sql.SQLDatabaseProxyCreator;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.JPackage;
import com.google.gwt.logging.client.LogConfiguration;
import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
/**
* This class creates a client proxy for access a database
*
* @author Thiago da Rosa de Bustamante
*
*/
public class DatabaseProxyCreator extends AbstractInterfaceWrapperProxyCreator
{
private String idxDatabaseImplClass;
private String sqlDatabaseImplClass;
public DatabaseProxyCreator(TreeLogger logger, GeneratorContext context, JClassType baseIntf)
{
super(logger, context, baseIntf, false);
idxDatabaseImplClass = new IDBDatabaseProxyCreator(logger, context, baseIntf).create();
sqlDatabaseImplClass = new SQLDatabaseProxyCreator(logger, context, baseIntf).create();
}
@Override
protected void generateProxyContructor(SourcePrinter srcWriter) throws CruxGeneratorException
{
srcWriter.println("public "+getProxySimpleName()+"(){");
srcWriter.println("if ("+Crux.class.getCanonicalName()+".getConfig().preferWebSQLForNativeDB() && isWebSQLDBSupported()){");
srcWriter.println("useWebSQL();");
srcWriter.println("}");
srcWriter.println("else if (isIndexedDBSupported()){");
srcWriter.println("useIndexedDB();");
srcWriter.println("}");
srcWriter.println("else if (isWebSQLDBSupported()){");
srcWriter.println("useWebSQL();");
srcWriter.println("}");
srcWriter.println("}");
}
@Override
protected void generateProxyFields(SourcePrinter srcWriter) throws CruxGeneratorException
{
srcWriter.println("protected static Logger logger = Logger.getLogger("+getProxySimpleName()+".class.getName());");
srcWriter.println("private Database impl;");
}
@Override
protected void generateProxyMethods(SourcePrinter srcWriter)
{
generateIsOpenMethod(srcWriter);
generateGetNameMethod(srcWriter);
generateGetVersionMethod(srcWriter);
generateSetNameMethod(srcWriter);
generateSetVersionMethod(srcWriter);
generateOpenMethod(srcWriter);
generateCloseMethod(srcWriter);
generateDeleteMethod(srcWriter);
generateGetTransactionMethod(srcWriter);
generateGetTransactionCallbackMethod(srcWriter);
generateAddMethod(srcWriter);
generatePutMethod(srcWriter);
generateGetMethod(srcWriter);
generateDeleteStoreMethod(srcWriter);
generateDeleteStoreRangeMethod(srcWriter);
generateDefaultErrorHandlerMethod(srcWriter);
generateIsSupportedMethod(srcWriter);
generateIsIndexedDBSupported(srcWriter);
generateIsWebSQLDBSupported(srcWriter);
generateUseWebSQL(srcWriter);
generateUseIndexedDB(srcWriter);
}
private void generateUseWebSQL(SourcePrinter srcWriter)
{
srcWriter.println("public void useWebSQL(){");
srcWriter.println("if (isWebSQLDBSupported()){");
srcWriter.println("if (LogConfiguration.loggingIsEnabled()){");
srcWriter.println("logger.log(Level.INFO, \"Using WEB SQL as native database implementation.\");");
srcWriter.println("}");
srcWriter.println("this.impl = new "+sqlDatabaseImplClass+"();");
srcWriter.println("}");
srcWriter.println("else {");
srcWriter.println("this.impl = null;");
srcWriter.println("}");
srcWriter.println("}");
srcWriter.println();
}
private void generateUseIndexedDB(SourcePrinter srcWriter)
{
srcWriter.println("public void useIndexedDB(){");
srcWriter.println("if (isIndexedDBSupported()){");
srcWriter.println("if (LogConfiguration.loggingIsEnabled()){");
srcWriter.println("logger.log(Level.INFO, \"Using Indexed DB as native database implementation.\");");
srcWriter.println("}");
srcWriter.println("this.impl = new "+idxDatabaseImplClass+"();");
srcWriter.println("}");
srcWriter.println("else {");
srcWriter.println("this.impl = null;");
srcWriter.println("}");
srcWriter.println("}");
srcWriter.println();
}
private void generateIsSupportedMethod(SourcePrinter srcWriter)
{
srcWriter.println("public boolean isSupported(){");
srcWriter.println("return impl != null;");
srcWriter.println("}");
srcWriter.println();
}
private void generateDefaultErrorHandlerMethod(SourcePrinter srcWriter)
{
srcWriter.println(" public void setDefaultErrorHandler("+DatabaseErrorHandler.class.getCanonicalName()+" errorHandler){");
srcWriter.println("impl.setDefaultErrorHandler(errorHandler);");
srcWriter.println("}");
srcWriter.println();
}
private void generateDeleteStoreRangeMethod(SourcePrinter srcWriter)
{
srcWriter.println(" public <K> void delete("+KeyRange.class.getCanonicalName()+"<K> keyRange, String objectStore, "+DatabaseCallback.class.getCanonicalName()+" callback){");
srcWriter.println("impl.delete(keyRange, objectStore, callback);");
srcWriter.println("}");
srcWriter.println();
}
private void generateDeleteStoreMethod(SourcePrinter srcWriter)
{
srcWriter.println(" public <K> void delete(K key, String objectStore, "+DatabaseCallback.class.getCanonicalName()+" callback){");
srcWriter.println("impl.delete(key, objectStore, callback);");
srcWriter.println("}");
srcWriter.println();
}
private void generateGetMethod(SourcePrinter srcWriter)
{
srcWriter.println(" public <K, V> void get(K key, String objectStore, "+DatabaseRetrieveCallback.class.getCanonicalName()+"<V> callback){");
srcWriter.println("impl.get(key, objectStore, callback);");
srcWriter.println("}");
srcWriter.println();
}
private void generatePutMethod(SourcePrinter srcWriter)
{
srcWriter.println(" public <V> void put(V[] objects, String objectStoreName, "+DatabaseCallback.class.getCanonicalName()+" callback){");
srcWriter.println("impl.put(objects, objectStoreName, callback);");
srcWriter.println("}");
srcWriter.println();
srcWriter.println(" public <V> void put(List<V> objects, String objectStoreName, "+DatabaseCallback.class.getCanonicalName()+" callback){");
srcWriter.println("impl.put(objects, objectStoreName, callback);");
srcWriter.println("}");
srcWriter.println();
}
private void generateAddMethod(SourcePrinter srcWriter)
{
srcWriter.println("public <V> void add(V[] objects, String objectStoreName, "+DatabaseCallback.class.getCanonicalName()+" callback){");
srcWriter.println("impl.add(objects, objectStoreName, callback);");
srcWriter.println("}");
srcWriter.println();
srcWriter.println("public <V> void add(List<V> objects, String objectStoreName, "+DatabaseCallback.class.getCanonicalName()+" callback){");
srcWriter.println("impl.add(objects, objectStoreName, callback);");
srcWriter.println("}");
srcWriter.println();
}
private void generateGetTransactionCallbackMethod(SourcePrinter srcWriter)
{
srcWriter.println("public "+Transaction.class.getCanonicalName()+" getTransaction(String[] storeNames, "+
Transaction.class.getCanonicalName()+".Mode mode, "+
TransactionCallback.class.getCanonicalName()+" callback){");
srcWriter.println("return impl.getTransaction(storeNames, mode, callback);");
srcWriter.println("}");
srcWriter.println();
}
private void generateGetTransactionMethod(SourcePrinter srcWriter)
{
srcWriter.println("public "+Transaction.class.getCanonicalName()+" getTransaction(String[] storeNames, "+Transaction.class.getCanonicalName()+".Mode mode){");
srcWriter.println("return impl.getTransaction(storeNames, mode);");
srcWriter.println("}");
srcWriter.println();
}
private void generateDeleteMethod(SourcePrinter srcWriter)
{
srcWriter.println("public void delete("+DatabaseCallback.class.getCanonicalName()+" callback){");
srcWriter.println("impl.delete(callback);");
srcWriter.println("}");
srcWriter.println();
}
private void generateCloseMethod(SourcePrinter srcWriter)
{
srcWriter.println("public void close(){");
srcWriter.println("impl.close();");
srcWriter.println("}");
srcWriter.println();
}
private void generateOpenMethod(SourcePrinter srcWriter)
{
srcWriter.println("public void open("+DatabaseCallback.class.getCanonicalName()+" callback){");
srcWriter.println("impl.open(callback);");
srcWriter.println("}");
srcWriter.println();
}
private void generateSetVersionMethod(SourcePrinter srcWriter)
{
srcWriter.println("public void setVersion(int version){");
srcWriter.println("impl.setVersion(version);");
srcWriter.println("}");
srcWriter.println();
}
private void generateSetNameMethod(SourcePrinter srcWriter)
{
srcWriter.println("public void setName(String name){");
srcWriter.println("impl.setName(name);");
srcWriter.println("}");
srcWriter.println();
}
private void generateGetVersionMethod(SourcePrinter srcWriter)
{
srcWriter.println("public int getVersion(){");
srcWriter.println("return impl.getVersion();");
srcWriter.println("}");
srcWriter.println();
}
private void generateGetNameMethod(SourcePrinter srcWriter)
{
srcWriter.println("public String getName(){");
srcWriter.println("return impl.getName();");
srcWriter.println("}");
srcWriter.println();
}
private void generateIsOpenMethod(SourcePrinter srcWriter)
{
srcWriter.println("public boolean isOpen(){");
srcWriter.println("return impl.isOpen();");
srcWriter.println("}");
srcWriter.println();
}
private void generateIsIndexedDBSupported(SourcePrinter srcWriter)
{
srcWriter.println("private native boolean isIndexedDBSupported()/*-{");
srcWriter.println("var IDBKeyRange = $wnd.IDBKeyRange || $wnd.webkitIDBKeyRange;");
srcWriter.println("var indexedDB = $wnd.indexedDB || $wnd.mozIndexedDB || $wnd.webkitIndexedDB;");
srcWriter.println("if (IDBKeyRange && indexedDB) {");
srcWriter.println("return true;");
srcWriter.println("}");
srcWriter.println("return false;");
srcWriter.println("}-*/;");
srcWriter.println();
}
private void generateIsWebSQLDBSupported(SourcePrinter srcWriter)
{
srcWriter.println("private native boolean isWebSQLDBSupported()/*-{");
srcWriter.println("var sqlsupport = !!$wnd.openDatabase;");
srcWriter.println("return sqlsupport;");
srcWriter.println("}-*/;");
srcWriter.println();
}
@Override
protected String[] getImports()
{
return new String[]{
Logger.class.getCanonicalName(),
List.class.getCanonicalName(),
LogConfiguration.class.getCanonicalName(),
Level.class.getCanonicalName(),
StringUtils.class.getCanonicalName(),
Database.class.getCanonicalName(),
GWT.class.getCanonicalName()
};
}
/**
* @return a sourceWriter for the proxy class
*/
@Override
protected SourcePrinter getSourcePrinter()
{
JPackage pkg = baseIntf.getPackage();
String packageName = pkg == null ? "" : pkg.getName();
PrintWriter printWriter = context.tryCreate(logger, packageName, getProxySimpleName());
if (printWriter == null)
{
return null;
}
ClassSourceFileComposerFactory composerFactory = new ClassSourceFileComposerFactory(packageName, getProxySimpleName());
String[] imports = getImports();
for (String imp : imports)
{
composerFactory.addImport(imp);
}
composerFactory.addImplementedInterface(baseIntf.getQualifiedSourceName());
return new SourcePrinter(composerFactory.createSourceWriter(context, printWriter), logger);
}
}