/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* 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 freemarker.template.utility;
import java.io.IOException;
import java.io.Writer;
import java.util.Map;
import org.python.core.PyObject;
import org.python.util.PythonInterpreter;
import freemarker.core.Environment;
import freemarker.template.TemplateTransformModel;
/**
* A crude first pass at an embeddable Jython interpreter
*/
public class JythonRuntime extends PythonInterpreter
implements TemplateTransformModel
{
public Writer getWriter(final Writer out,
final Map args)
{
final StringBuffer buf = new StringBuffer();
final Environment env = Environment.getCurrentEnvironment();
return new Writer() {
public void write(char cbuf[], int off, int len) {
buf.append(cbuf, off, len);
}
public void flush() throws IOException {
interpretBuffer();
out.flush();
}
public void close() {
interpretBuffer();
}
private void interpretBuffer() {
synchronized(JythonRuntime.this) {
PyObject prevOut = systemState.stdout;
try {
setOut(out);
set("env", env);
exec(buf.toString());
buf.setLength(0);
} finally {
setOut(prevOut);
}
}
}
};
}
}