org.apache.commons.jexl
public class ScriptFactory extends java.lang.Object
Creates Script
s. To create a JEXL Script, pass
valid JEXL syntax to the static createScript() method:
String jexl = "y = x * 12 + 44; y = y * 4;"; Script script = ScriptFactory.createScript( jexl );
When an Script
is created, the JEXL syntax is
parsed and verified.
Modifier and Type | Field and Description |
---|---|
protected static ScriptFactory |
factory
ScriptFactory is a singleton and this is the private
instance fufilling that pattern.
|
protected static org.apache.commons.logging.Log |
log
The Log to which all ScriptFactory messages will be logged.
|
protected static org.apache.commons.jexl.parser.Parser |
parser
The singleton ScriptFactory also holds a single instance of
Parser . |
Modifier and Type | Method and Description |
---|---|
protected Script |
createNewScript(java.lang.String scriptText)
Creates a new Script based on the string.
|
static Script |
createScript(java.io.File scriptFile)
Creates a Script from a
File containing valid JEXL syntax. |
static Script |
createScript(java.lang.String scriptText)
Creates a Script from a String containing valid JEXL syntax.
|
static Script |
createScript(java.net.URL scriptUrl)
Creates a Script from a
URL containing valid JEXL syntax. |
protected static ScriptFactory |
getInstance()
Returns the single instance of ScriptFactory.
|
protected static org.apache.commons.logging.Log log
protected static org.apache.commons.jexl.parser.Parser parser
Parser
. When parsing expressions, ScriptFactory
synchronizes on Parser.protected static ScriptFactory factory
protected static ScriptFactory getInstance()
public static Script createScript(java.lang.String scriptText) throws java.lang.Exception
scriptText
- A String containing valid JEXL syntaxScript
which can be executed with a
JexlContext
.java.lang.Exception
- An exception can be thrown if there is a
problem parsing the script.public static Script createScript(java.io.File scriptFile) throws java.lang.Exception
File
containing valid JEXL syntax.
This method parses the script and validates the syntax.scriptFile
- A File
containing valid JEXL syntax.
Must not be null. Must be a readable file.Script
which can be executed with a
JexlContext
.java.lang.Exception
- An exception can be thrown if there is a problem
parsing the script.public static Script createScript(java.net.URL scriptUrl) throws java.lang.Exception
URL
containing valid JEXL syntax.
This method parses the script and validates the syntax.scriptUrl
- A URL
containing valid JEXL syntax.
Must not be null. Must be a readable file.Script
which can be executed with a
JexlContext
.java.lang.Exception
- An exception can be thrown if there is a problem
parsing the script.protected Script createNewScript(java.lang.String scriptText) throws java.lang.Exception
scriptText
- valid Jexl scriptjava.lang.Exception
- for a variety of reasons - mostly malformed scriptsCopyright © 2014 The Apache Software Foundation. All Rights Reserved.