/**
* Copyright (C) 2012 JBoss Inc
*
* 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.jboss.dashboard.command;
import org.jboss.dashboard.ui.DashboardFilter;
import org.jboss.dashboard.ui.components.DashboardFilterProperty;
import org.jboss.dashboard.function.ScalarFunction;
import org.jboss.dashboard.LocaleManager;
import java.util.Collection;
import java.util.Locale;
import java.util.Iterator;
import java.text.NumberFormat;
/**
* It applies a scalar function over a data set property.
*/
public class ScalarFunctionCommand extends AbstractCommand {
protected ScalarFunction scalarFunction;
public ScalarFunctionCommand(String commandName, ScalarFunction scalarFunction) {
super(commandName);
this.scalarFunction = scalarFunction;
}
public ScalarFunction getScalarFunction() {
return scalarFunction;
}
public void setScalarFunction(ScalarFunction scalarFunction) {
this.scalarFunction = scalarFunction;
}
public String execute() throws Exception {
if (getArguments().size() < 1) return "[" + name + ", missing arguments]";
String propId = getArgument(0);
DashboardFilter dashboardFilter = (DashboardFilter) dataFilter;
DashboardFilterProperty filterProp = dashboardFilter.getFilterPropertyById(propId);
if (filterProp == null || filterProp.getDataProviderCode() == null) {
return "[" + name + ", property '" + propId + "' not found]";
}
Locale locale = LocaleManager.currentLocale();
Collection values = filterProp.getPropertyAllValues();
if (values == null || values.isEmpty()) return filterProp.formatPropertyValue(new Double(0), locale);
// Get the first not null value.
Object first = null;
Iterator it = values.iterator();
while (first == null && it.hasNext()) first = it.next();
if (first == null) return filterProp.formatPropertyValue(new Double(0), locale);
if (!scalarFunction.isTypeSupported(first.getClass())) return "[" + name + ", " + first.getClass().getName() + " type unsupported]";
return NumberFormat.getInstance(locale).format(scalarFunction.scalar(values));
}
public boolean containsProperty(String propertyId) throws Exception {
String arg = getArgument(0);
return (arg != null && arg.equals(propertyId));
}
}