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.jython;
054:
055: import org.python.core.Py;
056: import org.python.core.PyException;
057: import org.python.core.PyObject;
058:
059: import freemarker.ext.util.ModelFactory;
060: import freemarker.template.ObjectWrapper;
061: import freemarker.template.TemplateModel;
062: import freemarker.template.TemplateModelException;
063: import freemarker.template.TemplateNumberModel;
064:
065: /**
066: * Model for Jython numeric objects ({@link org.python.core.PyInteger}, {@link org.python.core.PyLong},
067: * {@link org.python.core.PyFloat}).
068: * @version $Id: JythonNumberModel.java,v 1.10 2003/11/12 21:53:40 ddekany Exp $
069: * @author Attila Szegedi
070: */
071: public class JythonNumberModel extends JythonModel implements
072: TemplateNumberModel {
073: static final ModelFactory FACTORY = new ModelFactory() {
074: public TemplateModel create(Object object, ObjectWrapper wrapper) {
075: return new JythonNumberModel((PyObject) object,
076: (JythonWrapper) wrapper);
077: }
078: };
079:
080: public JythonNumberModel(PyObject object, JythonWrapper wrapper) {
081: super (object, wrapper);
082: }
083:
084: /**
085: * Returns either {@link PyObject#__tojava__(java.lang.Class)} with
086: * {@link java.lang.Number}.class as argument. If that fails, returns
087: * {@link PyObject#__float__()}.
088: */
089: public Number getAsNumber() throws TemplateModelException {
090: try {
091: Object value = object.__tojava__(java.lang.Number.class);
092: if (value == null || value == Py.NoConversion) {
093: return new Double(object.__float__().getValue());
094: }
095: return (Number) value;
096: } catch (PyException e) {
097: throw new TemplateModelException(e);
098: }
099: }
100: }
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