001: /*
002: * Copyright (c) 2003 The Visigoth Software Society. All rights
003: * reserved.
004: *
005: * Redistribution and use in source and binary forms, with or without
006: * modification, are permitted provided that the following conditions
007: * are met:
008: *
009: * 1. Redistributions of source code must retain the above copyright
010: * notice, this list of conditions and the following disclaimer.
011: *
012: * 2. Redistributions in binary form must reproduce the above copyright
013: * notice, this list of conditions and the following disclaimer in
014: * the documentation and/or other materials provided with the
015: * distribution.
016: *
017: * 3. The end-user documentation included with the redistribution, if
018: * any, must include the following acknowledgement:
019: * "This product includes software developed by the
020: * Visigoth Software Society (http://www.visigoths.org/)."
021: * Alternately, this acknowledgement may appear in the software itself,
022: * if and wherever such third-party acknowledgements normally appear.
023: *
024: * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
025: * project contributors may be used to endorse or promote products derived
026: * from this software without prior written permission. For written
027: * permission, please contact visigoths@visigoths.org.
028: *
029: * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
030: * nor may "FreeMarker" or "Visigoth" appear in their names
031: * without prior written permission of the Visigoth Software Society.
032: *
033: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
034: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
035: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
036: * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
037: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
038: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
039: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
040: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
041: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
042: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
043: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
044: * SUCH DAMAGE.
045: * ====================================================================
046: *
047: * This software consists of voluntary contributions made by many
048: * individuals on behalf of the Visigoth Software Society. For more
049: * information on the Visigoth Software Society, please see
050: * http://www.visigoths.org/
051: */
052:
053: package freemarker.ext.ant;
054:
055: import java.io.*;
056: import java.util.Map;
057:
058: import org.apache.tools.ant.BuildException;
059: import org.apache.tools.ant.ProjectHelper;
060: import org.apache.tools.ant.Task;
061:
062: import freemarker.template.utility.ClassUtil;
063:
064: /**
065: * Used internally, public for technical reasons only.
066: *
067: * <p>This is an Ant sub-task of the {@link FreemarkerXmlTask} task.
068: *
069: * <p><b>Warning! It must not be statically linked with Jython classes</b>,
070: * so users can use the XML ant task even if Jython is not installed.
071: */
072: public class JythonAntTask extends Task {
073:
074: private File scriptFile;
075: private String script = "";
076: private UnlinkedJythonOperations jythonOps;
077:
078: public void setFile(File scriptFile) throws BuildException {
079: ensureJythonOpsExists();
080: this .scriptFile = scriptFile;
081: }
082:
083: public void addText(String text) {
084: script += text;
085: }
086:
087: public void execute(Map vars) throws BuildException {
088: if (scriptFile != null) {
089: ensureJythonOpsExists();
090: jythonOps.execute(scriptFile, vars);
091: }
092: if (script.trim().length() > 0) {
093: ensureJythonOpsExists();
094: String finalScript = ProjectHelper.replaceProperties(
095: project, script, project.getProperties());
096: jythonOps.execute(finalScript, vars);
097: }
098: }
099:
100: private void ensureJythonOpsExists() {
101: if (jythonOps == null) {
102: Class clazz;
103: try {
104: clazz = ClassUtil
105: .forName("freemarker.ext.ant.UnlinkedJythonOperationsImpl");
106: } catch (ClassNotFoundException e) {
107: throw new RuntimeException(
108: "A ClassNotFoundException has been thrown when trying "
109: + "to get the "
110: + "freemarker.ext.ant.UnlinkedJythonOperationsImpl class. "
111: + "The error message was: "
112: + e.getMessage());
113: }
114: try {
115: jythonOps = (UnlinkedJythonOperations) clazz
116: .newInstance();
117: } catch (Exception e) {
118: throw new RuntimeException(
119: "An exception has been thrown when trying "
120: + "to create a freemarker.ext.ant.JythonAntTask "
121: + "object. The exception was: " + e);
122: }
123: }
124: }
125:
126: }
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