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Liferay Portal Template FreeMarker
/*
* 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 java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;
import java.util.Map;
import org.python.core.Py;
import org.python.core.PyDictionary;
import org.python.core.PyFloat;
import org.python.core.PyInteger;
import org.python.core.PyLong;
import org.python.core.PyNone;
import org.python.core.PyObject;
import org.python.core.PySequence;
import org.python.core.PyStringMap;
import freemarker.ext.beans.BeansWrapper;
import freemarker.ext.beans.DateModel;
import freemarker.ext.util.ModelCache;
import freemarker.template.TemplateModel;
class JythonModelCache extends ModelCache {
private final JythonWrapper wrapper;
JythonModelCache(JythonWrapper wrapper) {
this.wrapper = wrapper;
}
@Override
protected boolean isCacheable(Object object) {
return true;
}
@Override
protected TemplateModel create(Object obj) {
boolean asHash = false;
boolean asSequence = false;
JythonVersionAdapter versionAdapter = JythonVersionAdapterHolder.INSTANCE;
if (versionAdapter.isPyInstance(obj)) {
Object jobj = versionAdapter.pyInstanceToJava(obj);
// FreeMarker-aware, Jython-wrapped Java objects are left intact
if (jobj instanceof TemplateModel) {
return (TemplateModel) jobj;
}
if (jobj instanceof Map) {
asHash = true;
}
if (jobj instanceof Date) {
return new DateModel((Date) jobj, BeansWrapper.getDefaultInstance());
} else if (jobj instanceof Collection) {
asSequence = true;
// FIXME: This is an ugly hack, but AFAIK, there's no better
// solution if we want to have Sets and other non-List
// collections managed by this layer, as Jython quite clearly
// doesn't support sets.
if (!(jobj instanceof List)) {
obj = new ArrayList((Collection) jobj);
}
}
}
// If it's not a PyObject, first make a PyObject out of it.
if (!(obj instanceof PyObject)) {
obj = Py.java2py(obj);
}
if (asHash || obj instanceof PyDictionary || obj instanceof PyStringMap) {
return JythonHashModel.FACTORY.create(obj, wrapper);
}
if (asSequence || obj instanceof PySequence) {
return JythonSequenceModel.FACTORY.create(obj, wrapper);
}
if (obj instanceof PyInteger || obj instanceof PyLong || obj instanceof PyFloat) {
return JythonNumberModel.FACTORY.create(obj, wrapper);
}
if (obj instanceof PyNone) {
return null;
}
return JythonModel.FACTORY.create(obj, wrapper);
}
}
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