org.camunda.bpm.engine.impl.scripting.env
Class ScriptingEnvironment

java.lang.Object
  org.camunda.bpm.engine.impl.scripting.env.ScriptingEnvironment

public class ScriptingEnvironment
extends Object

The scripting environment contains scripts that provide an environment to a user provided script. The environment may contain additional libraries or imports.

The environment performs lazy initialization of scripts: the first time a script of a given script language is executed, the environment will use the ScriptEnvResolvers for resolving the environment scripts for that language. The scripts (if any) are then pre-compiled and cached for reuse.

Author:

Daniel Meyer

Field Summary

protected Map<String,List<ExecutableScript>>	env the cached environment scripts per script language
protected List<ScriptEnvResolver>	envResolvers the resolvers
protected ScriptFactory	scriptFactory the script factory used for compiling env scripts
protected ScriptingEngines	scriptingEngines the scripting engines

Constructor Summary

ScriptingEnvironment(ScriptFactory scriptFactory, List<ScriptEnvResolver> scriptEnvResolvers, ScriptingEngines scriptingEngines)

Method Summary

Object	execute(ExecutableScript script, VariableScope scope) execute a given script in the environment
Object	execute(ExecutableScript script, VariableScope scope, Bindings bindings, ScriptEngine scriptEngine)
protected List<ExecutableScript>	getEnvScripts(String scriptLanguage) Returns the env scripts for the given language.
protected List<ExecutableScript>	initEnvForLanguage(String language) Initializes the env scripts for a given language.

Methods inherited from class java.lang.Object

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

Field Detail

env

protected Map<String,List<ExecutableScript>> env

the cached environment scripts per script language

envResolvers

protected List<ScriptEnvResolver> envResolvers

the resolvers

scriptFactory

protected ScriptFactory scriptFactory

the script factory used for compiling env scripts

scriptingEngines

protected ScriptingEngines scriptingEngines

the scripting engines

Constructor Detail

ScriptingEnvironment

public ScriptingEnvironment(ScriptFactory scriptFactory,
                            List<ScriptEnvResolver> scriptEnvResolvers,
                            ScriptingEngines scriptingEngines)

Method Detail

execute

public Object execute(ExecutableScript script,
                      VariableScope scope)

execute a given script in the environment

Parameters:

script - the ExecutableScript to execute

scope - the scope in which to execute the script

Returns:

the result of the script evaluation

execute

public Object execute(ExecutableScript script,
                      VariableScope scope,
                      Bindings bindings,
                      ScriptEngine scriptEngine)

getEnvScripts

protected List<ExecutableScript> getEnvScripts(String scriptLanguage)

Returns the env scripts for the given language. Performs lazy initialization of the env scripts.

Parameters:

scriptLanguage - the language

Returns:

a list of executable environment scripts. Never null.

initEnvForLanguage

protected List<ExecutableScript> initEnvForLanguage(String language)

Initializes the env scripts for a given language.

Parameters:

language - the language

Returns:

the list of env scripts. Never null.