Package org.apache.velocity.script

Class VelocityScriptEngine

java.lang.Object

javax.script.AbstractScriptEngine

org.apache.velocity.script.VelocityScriptEngine

All Implemented Interfaces:

Compilable, ScriptEngine

public class VelocityScriptEngine
extends AbstractScriptEngine
implements Compilable

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	VelocityScriptEngine.SingleResourceReader

Field Summary

Fields

Modifier and Type	Field	Description
static final String	VELOCITY_PROPERTIES_KEY	Key used to provide this engine with the pathname of the Velocity properties file.

Fields inherited from class javax.script.AbstractScriptEngine

context

Fields inherited from interface javax.script.ScriptEngine

ARGV, ENGINE, ENGINE_VERSION, FILENAME, LANGUAGE, LANGUAGE_VERSION, NAME

Constructor Summary

Constructors

Constructor	Description
VelocityScriptEngine()	constructs a new standalone Velocity script engine
VelocityScriptEngine(ScriptEngineFactory factory)	constructs a new Velocity script engine, linked to the given factory

Method Summary

Modifier and Type	Method	Description
CompiledScript	compile(Reader script)	Compile a template
CompiledScript	compile(String script)	Compile a template
Bindings	createBindings()	creates a new Bindings to be used with this script
Object	eval(Reader reader, ScriptContext ctx)	Evaluate the given script.
Object	eval(String str, ScriptContext ctx)	Evaluate the given script.
ScriptEngineFactory	getFactory()	get the factory used to create this script engine
protected static String	getFilename(ScriptContext ctx)
protected static VelocityContext	getVelocityContext(ScriptContext ctx)
protected RuntimeInstance	getVelocityEngine()	get the internal Velocity RuntimeInstance
protected static Properties	getVelocityProperties(ScriptContext ctx)

Methods inherited from class javax.script.AbstractScriptEngine

eval, eval, eval, eval, get, getBindings, getContext, getScriptContext, put, setBindings, setContext

Methods inherited from class java.lang.Object

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

Field Details

VELOCITY_PROPERTIES_KEY

public static final String VELOCITY_PROPERTIES_KEY

Key used to provide this engine with the pathname of the Velocity properties file. This key is first searched in the ScriptContext attributes, then as a System property

See Also:

• Constant Field Values

Constructor Details

VelocityScriptEngine

public VelocityScriptEngine(ScriptEngineFactory factory)

constructs a new Velocity script engine, linked to the given factory

Parameters:

factory -

VelocityScriptEngine

public VelocityScriptEngine()

constructs a new standalone Velocity script engine

Method Details

getVelocityEngine

protected RuntimeInstance getVelocityEngine()

get the internal Velocity RuntimeInstance

Returns:

the internal Velocity RuntimeInstance

eval

public Object eval(String str,
 ScriptContext ctx)
            throws ScriptException

Evaluate the given script. If you wish to get a resulting string, call getContext().setWriter(new StringWriter()) then call toString() on the returned writer.

Specified by:

eval in interface ScriptEngine

Parameters:

str - script source

ctx - script context

Returns:

the script context writer (by default a PrintWriter towards System.out)

Throws:

ScriptException

eval

public Object eval(Reader reader,
 ScriptContext ctx)
            throws ScriptException

Evaluate the given script. If you wish to get a resulting string, call getContext().setWriter(new StringWriter()) then call toString() on the returned writer.

Specified by:

eval in interface ScriptEngine

Parameters:

reader - script source reader

ctx - script context

Returns:

the script context writer (by default a PrintWriter towards System.out)

Throws:

ScriptException

getFactory

public ScriptEngineFactory getFactory()

get the factory used to create this script engine

Specified by:

getFactory in interface ScriptEngine

Returns:

factory

createBindings

public Bindings createBindings()

creates a new Bindings to be used with this script

Specified by:

createBindings in interface ScriptEngine

Returns:

new bindings

getVelocityContext

protected static VelocityContext getVelocityContext(ScriptContext ctx)

getFilename

protected static String getFilename(ScriptContext ctx)

getVelocityProperties

protected static Properties getVelocityProperties(ScriptContext ctx)

compile

public CompiledScript compile(String script)
                       throws ScriptException

Compile a template

Specified by:

compile in interface Compilable

Parameters:

script - template source

Returns:

compiled template

Throws:

ScriptException

compile

public CompiledScript compile(Reader script)
                       throws ScriptException

Compile a template

Specified by:

compile in interface Compilable

Parameters:

script - template source

Returns:

compiled template

Throws:

ScriptException