package com.redspr.redquerybuilder.js.client;
import java.util.ArrayList;
import java.util.List;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.JsArrayMixed;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.SimplePanel;
import com.redspr.redquerybuilder.core.client.Configuration;
import com.redspr.redquerybuilder.core.client.command.CommandBuilder;
import com.redspr.redquerybuilder.core.client.command.dml.Select;
import com.redspr.redquerybuilder.core.client.engine.Session;
import com.redspr.redquerybuilder.core.client.engine.TableEvent;
import com.redspr.redquerybuilder.core.client.engine.TableEventHandler;
import com.redspr.redquerybuilder.core.client.expression.ExpressionColumn;
import com.redspr.redquerybuilder.core.client.table.TableFilter;
import com.redspr.redquerybuilder.core.client.util.ObjectArray;
import com.redspr.redquerybuilder.core.shared.meta.Column;
/**
* Bootstraps the JS version.
*
* NB methods in order or lifecycle rather than normal rules.
*/
public class RedQueryBuilder implements EntryPoint {
private final SimplePanel builderContainer = new SimplePanel();
@Override
public void onModuleLoad() {
publish();
}
private native void publish() /*-{
$wnd.redQueryBuilder =
@com.redspr.redquerybuilder.js.client.RedQueryBuilder::configure(Lcom/redspr/redquerybuilder/js/client/JsConfiguration;Ljava/lang/String;Lcom/google/gwt/core/client/JsArrayMixed;);
}-*/;
// TODO 00 unit test, null args
static CommandBuilder configure(JsConfiguration config, String sql,
JsArrayMixed args) throws Exception {
if (config == null) {
throw new IllegalArgumentException("Config is null.");
}
RedQueryBuilder rqb = new RedQueryBuilder();
return rqb.install(config, sql, JsList.get().toList(args));
}
private CommandBuilder install(JsConfiguration config2, String sql, List<Object> args)
throws Exception {
Configuration config = new ConfigurationAdapter(config2);
RootPanel.get(config2.getTargetId()).add(builderContainer);
return createCommandBuilder(config, sql, args);
}
private CommandBuilder createCommandBuilder(final Configuration config2, String sql,
List<Object> args) throws Exception {
final Session session = new Session(config2);
final CommandBuilder builder = new CommandBuilder(session, sql, args);
session.getMsgBus().addHandler(TableEvent.TYPE,
new TableEventHandler() {
@Override
public void onTable(TableEvent e) {
ObjectArray expr;
if (session.getFilters().size() > 0) {
config2.fireOnTableChange(session.getFilters());
// XXX need to do distinct?
expr = ObjectArray.newInstance();
TableFilter tf = session.getFilters().get(0);
String alias = tf.getAlias();
for (Column col : tf.getTable().getColumns()) {
expr.add(new ExpressionColumn(session, null, alias,
col.getName()));
}
} else {
expr = null;
}
builder.getSelect().setExpressions(expr);
}
});
builder.addValueChangeHandler(new ValueChangeHandler<Select>() {
@Override
public void onValueChange(ValueChangeEvent<Select> event) {
List<Object> args = new ArrayList<Object>();
String sql = event.getValue().getSQL(args);
config2.fireOnSqlChange(sql, args);
}
});
builderContainer.setWidget(builder);
config2.fireOnTableChange(session.getFilters());
return builder;
}
}