org.delia.runner

Class RunnerImpl

java.lang.Object

org.delia.core.ServiceBase

org.delia.runner.RunnerImpl

All Implemented Interfaces:

Runner, VarEvaluator

public class RunnerImpl
extends ServiceBase
implements Runner

This class is not thread-safe. Only use it as a local var.

Author:

Ian Rae

Field Summary

Fields

Modifier and Type	Field and Description
static String	DOLLAR_DOLLAR
protected FetchRunnerImpl	fetchRunner
protected DTypeRegistry	registry

Fields inherited from class org.delia.core.ServiceBase

et, factorySvc, log

Constructor Summary

Constructors

Constructor and Description
RunnerImpl(FactoryService factorySvc, DBInterface dbInterface)

Method Summary

Modifier and Type	Method and Description
DeliaGeneratePhase	createGenerator() Get a generator which can be used to render DValues into xml,json,etc
TypeRunner	createTypeRunner()
String	evalVarAsString(String varName, String typeName)
ResultValue	executeOneStatement(Exp exp) Execute a single statement.
ResultValue	executeProgram(List<Exp> expL) Execute a single statement.
ResultValue	executeStatement(Exp exp)
boolean	exists(String varName) Does the given variable exist.
InternalCompileState	getCompileState() Get the compiler state.
ExecutionState	getExecutionState() Get the new execution context.
Log	getLog()
DTypeRegistry	getRegistry()
SprigService	getSprigSvc()
ResultValue	getVar(String varName) Gets a variable's value
boolean	init(ExecutionState ctx) Initialize the runner.
List<DValue>	lookupVar(String varName)
void	runQueryFnsIfNeeded(QueryExp queryExp, QueryResponse qresp, ResultValue res)

Methods inherited from class java.lang.Object

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

Field Detail

DOLLAR_DOLLAR

public static final String DOLLAR_DOLLAR

See Also:

Constant Field Values

registry

protected DTypeRegistry registry

fetchRunner

protected FetchRunnerImpl fetchRunner

Constructor Detail

RunnerImpl

public RunnerImpl(FactoryService factorySvc,
                  DBInterface dbInterface)

Method Detail

getLog

public Log getLog()

Specified by:

getLog in interface Runner

createGenerator

public DeliaGeneratePhase createGenerator()

Description copied from interface: Runner

Get a generator which can be used to render DValues into xml,json,etc

Specified by:

createGenerator in interface Runner

Returns:

a generator

getCompileState

public InternalCompileState getCompileState()

Description copied from interface: Runner

Get the compiler state. Used by compiler passes to verify and link the delia code.

Specified by:

getCompileState in interface Runner

Returns:

the internal compile state

getExecutionState

public ExecutionState getExecutionState()

Description copied from interface: Runner

Get the new execution context. Used when you want to execute again with the same types (i.e. same registry).

Specified by:

getExecutionState in interface Runner

Returns:

the execution state

init

public boolean init(ExecutionState ctx)

Description copied from interface: Runner

Initialize the runner. Should be called once after creating the Runner object. If we are continuing a previous run the execution state pass it in execState. If null is passed for execState then a new state will be created.

Specified by:

init in interface Runner

Parameters:

ctx - - if null then runner will create a new execution state.

Returns:

success flag

createTypeRunner

public TypeRunner createTypeRunner()

Specified by:

createTypeRunner in interface Runner

executeProgram

public ResultValue executeProgram(List<Exp> expL)

Description copied from interface: Runner

Execute a single statement.

Specified by:

executeProgram in interface Runner

Parameters:

expL - AST object to execute

Returns:

result value

executeOneStatement

public ResultValue executeOneStatement(Exp exp)

Description copied from interface: Runner

Execute a single statement. For advance use only.

Specified by:

executeOneStatement in interface Runner

Parameters:

exp - AST object to execute

Returns:

result value

executeStatement

public ResultValue executeStatement(Exp exp)

runQueryFnsIfNeeded

public void runQueryFnsIfNeeded(QueryExp queryExp,
                                QueryResponse qresp,
                                ResultValue res)

exists

public boolean exists(String varName)

Description copied from interface: Runner

Does the given variable exist. example: let x = Customer[true] would create a variable 'x'.

Specified by:

exists in interface Runner

Parameters:

varName - variable name

Returns:

true if exists

getVar

public ResultValue getVar(String varName)

Description copied from interface: Runner

Gets a variable's value

Specified by:

getVar in interface Runner

Parameters:

varName - variable name

Returns:

null if not found

getRegistry

public DTypeRegistry getRegistry()

Specified by:

getRegistry in interface Runner

lookupVar

public List<DValue> lookupVar(String varName)

Specified by:

lookupVar in interface VarEvaluator

evalVarAsString

public String evalVarAsString(String varName,
                              String typeName)

Specified by:

evalVarAsString in interface VarEvaluator

getSprigSvc

public SprigService getSprigSvc()

Specified by:

getSprigSvc in interface Runner