freemarker.ext.jython

Class JythonModel

java.lang.Object

freemarker.ext.jython.JythonModel

All Implemented Interfaces:

WrapperTemplateModel, AdapterTemplateModel, TemplateBooleanModel, TemplateHashModel, TemplateMethodModel, TemplateMethodModelEx, TemplateModel, TemplateScalarModel

Direct Known Subclasses:

JythonHashModel, JythonNumberModel, JythonSequenceModel

public class JythonModel
extends java.lang.Object
implements TemplateBooleanModel, TemplateScalarModel, TemplateHashModel, TemplateMethodModelEx, AdapterTemplateModel, WrapperTemplateModel

Generic model for arbitrary Jython objects.

Version:

$Id: JythonModel.java,v 1.14 2005/06/12 19:03:06 szegedia Exp $

Author:

Attila Szegedi

Field Summary

Fields

Modifier and Type	Field and Description
protected org.python.core.PyObject	object
protected JythonWrapper	wrapper

Fields inherited from interface freemarker.template.TemplateBooleanModel

FALSE, TRUE

Fields inherited from interface freemarker.template.TemplateScalarModel

EMPTY_STRING

Fields inherited from interface freemarker.template.TemplateModel

NOTHING

Constructor Summary

Constructors

Constructor and Description
JythonModel(org.python.core.PyObject object, JythonWrapper wrapper)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	exec(java.util.List arguments) Executes a method call.
TemplateModel	get(java.lang.String key) Calls PyObject.__findattr__(java.lang.String), then if it returns null calls PyObject.__finditem__(java.lang.String).
java.lang.Object	getAdaptedObject(java.lang.Class hint) Retrieves the underlying object, or some other object semantically equivalent to its value narrowed by the class hint.
boolean	getAsBoolean() Returns the value of PyObject.__nonzero__().
java.lang.String	getAsString() Returns the value of Object.toString().
java.lang.Object	getWrappedObject() Retrieves the object wrapped by this model.
boolean	isEmpty() Returns PyObject.__len__() == 0.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

object

protected final org.python.core.PyObject object

wrapper

protected final JythonWrapper wrapper

Constructor Detail

JythonModel

public JythonModel(org.python.core.PyObject object,
                   JythonWrapper wrapper)

Method Detail

getAsBoolean

public boolean getAsBoolean()
                     throws TemplateModelException

Returns the value of PyObject.__nonzero__().

Specified by:

getAsBoolean in interface TemplateBooleanModel

Returns:

whether to interpret this object as true or false in a boolean context

Throws:

TemplateModelException

getAsString

public java.lang.String getAsString()
                             throws TemplateModelException

Returns the value of Object.toString().

Specified by:

getAsString in interface TemplateScalarModel

Throws:

TemplateModelException

get

public TemplateModel get(java.lang.String key)
                  throws TemplateModelException

Calls PyObject.__findattr__(java.lang.String), then if it returns null calls PyObject.__finditem__(java.lang.String). If JythonWrapper.setAttributesShadowItems(boolean) was called with false, the order of calls is reversed (that is, item lookup takes precedence over attribute lookup).

Specified by:

get in interface TemplateHashModel

Parameters:

key - the name by which the TemplateModel is identified in the template.

Returns:

the TemplateModel referred to by the key, or null if not found.

Throws:

TemplateModelException

isEmpty

public boolean isEmpty()
                throws TemplateModelException

Returns PyObject.__len__() == 0.

Specified by:

isEmpty in interface TemplateHashModel

Throws:

TemplateModelException

exec

public java.lang.Object exec(java.util.List arguments)
                      throws TemplateModelException

Description copied from interface: TemplateMethodModelEx

Executes a method call.

Specified by:

exec in interface TemplateMethodModel

Specified by:

exec in interface TemplateMethodModelEx

Parameters:

arguments - a List of TemplateModel objects containing the values of the arguments passed to the method. If the implementation wishes to operate on POJOs that might be underlying the models, it can use the static utility methods in the DeepUnwrap class to easily obtain them.

Returns:

the return value of the method, or null. If the returned value does not implement TemplateModel, it will be automatically wrapped using the environment object wrapper.

Throws:

TemplateModelException

See Also:

TemplateMethodModel.exec(List)

getAdaptedObject

public java.lang.Object getAdaptedObject(java.lang.Class hint)

Description copied from interface: AdapterTemplateModel

Retrieves the underlying object, or some other object semantically equivalent to its value narrowed by the class hint.

Specified by:

getAdaptedObject in interface AdapterTemplateModel

Parameters:

hint - the desired class of the returned value. An implementation should make reasonable effort to retrieve an object of the requested class, but if that is impossible, it must at least return the underlying object as-is. As a minimal requirement, an implementation must always return the exact underlying object when hint.isInstance(underlyingObject) == true holds. When called with java.lang.Object.class, it should return a generic Java object (i.e. if the model is wrapping a scripting lanugage object that is further wrapping a Java object, the deepest underlying Java object should be returned).

Returns:

the underlying object, or its value accommodated for the hint class.

getWrappedObject

public java.lang.Object getWrappedObject()

Description copied from interface: WrapperTemplateModel

Retrieves the object wrapped by this model.

Specified by:

getWrappedObject in interface WrapperTemplateModel