freemarker.ext.ant.JythonAntTask 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.ant;
import java.io.File;
import java.util.Map;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.ProjectHelper;
import org.apache.tools.ant.Task;
import freemarker.template.utility.ClassUtil;
/**
* Used internally, public for technical reasons only.
*
* This is an Ant sub-task of the {@link FreemarkerXmlTask} task.
*
*
Warning! It must not be statically linked with Jython classes,
* so users can use the XML ant task even if Jython is not installed.
*/
public class JythonAntTask extends Task {
private File scriptFile;
private String script = "";
private UnlinkedJythonOperations jythonOps;
public void setFile(File scriptFile) throws BuildException {
ensureJythonOpsExists();
this.scriptFile = scriptFile;
}
public void addText(String text) {
script += text;
}
public void execute(Map vars) throws BuildException {
if (scriptFile != null) {
ensureJythonOpsExists();
jythonOps.execute(scriptFile, vars);
}
if (script.trim().length() > 0) {
ensureJythonOpsExists();
String finalScript = ProjectHelper.replaceProperties(
project, script, project.getProperties());
jythonOps.execute(finalScript, vars);
}
}
private void ensureJythonOpsExists() {
if (jythonOps == null) {
Class clazz;
try {
clazz = ClassUtil.forName(
"freemarker.ext.ant.UnlinkedJythonOperationsImpl");
} catch (ClassNotFoundException e) {
throw new RuntimeException(
"A ClassNotFoundException has been thrown when trying "
+ "to get the "
+ "freemarker.ext.ant.UnlinkedJythonOperationsImpl class. "
+ "The error message was: " + e.getMessage());
}
try {
jythonOps
= (UnlinkedJythonOperations) clazz.newInstance();
} catch (Exception e) {
throw new RuntimeException(
"An exception has been thrown when trying "
+ "to create a freemarker.ext.ant.JythonAntTask "
+ "object. The exception was: " + e);
}
}
}
}