freemarker.ext.jython.JythonNumberModel Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 freemarker.ext.jython;
import org.python.core.Py;
import org.python.core.PyException;
import org.python.core.PyObject;
import freemarker.ext.util.ModelFactory;
import freemarker.template.ObjectWrapper;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
import freemarker.template.TemplateNumberModel;
/**
* Model for Jython numeric objects ({@link org.python.core.PyInteger}, {@link org.python.core.PyLong},
* {@link org.python.core.PyFloat}).
*/
public class JythonNumberModel
extends
JythonModel
implements
TemplateNumberModel {
static final ModelFactory FACTORY =
new ModelFactory()
{
public TemplateModel create(Object object, ObjectWrapper wrapper) {
return new JythonNumberModel((PyObject) object, (JythonWrapper) wrapper);
}
};
public JythonNumberModel(PyObject object, JythonWrapper wrapper) {
super(object, wrapper);
}
/**
* Returns either {@link PyObject#__tojava__(java.lang.Class)} with
* {@link java.lang.Number}.class as argument. If that fails, returns
* {@link PyObject#__float__()}.
*/
public Number getAsNumber() throws TemplateModelException {
try {
Object value = object.__tojava__(java.lang.Number.class);
if (value == null || value == Py.NoConversion) {
return Double.valueOf(object.__float__().getValue());
}
return (Number) value;
} catch (PyException e) {
throw new TemplateModelException(e);
}
}
}