org.mvel2.integration.impl

Class BaseVariableResolverFactory

java.lang.Object

org.mvel2.integration.impl.BaseVariableResolverFactory

All Implemented Interfaces:

Serializable, VariableResolverFactory

Direct Known Subclasses:

CachedMapVariableResolverFactory, ClassImportResolverFactory, FunctionVariableResolverFactory, IndexedVariableResolverFactory, ItemResolverFactory, MapVariableResolverFactory, SimpleVariableResolverFactory, StaticMethodImportResolverFactory

public abstract class BaseVariableResolverFactory
extends Object
implements VariableResolverFactory

Use this class to extend you own VariableResolverFactories. It contains most of the baseline implementation needed for the vast majority of integration needs.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected String[]	indexedVariableNames
protected VariableResolver[]	indexedVariableResolvers
protected int	indexOffset
protected VariableResolverFactory	nextFactory
protected Map<String,VariableResolver>	variableResolvers

Constructor Summary

Constructors

Constructor and Description
BaseVariableResolverFactory()

Method Summary

Methods

Modifier and Type	Method and Description
void	appendFactory(VariableResolverFactory resolverFactory)
VariableResolver	createIndexedVariable(int index, String name, Object value)
VariableResolver	createIndexedVariable(int index, String name, Object value, Class<?> type)
String[]	getIndexedVariableNames()
VariableResolver	getIndexedVariableResolver(int index)
Set<String>	getKnownVariables() Return a list of known variables inside the factory.
VariableResolverFactory	getNextFactory() Returns the next factory in the factory chain.
VariableResolver	getVariableResolver(String name) Return a variable resolver for the specified variable name.
Map<String,VariableResolver>	getVariableResolvers()
void	insertFactory(VariableResolverFactory resolverFactory)
boolean	isIndexedFactory()
boolean	isNextResolveable(String name)
void	setIndexedVariableNames(String[] indexedVariableNames)
VariableResolver	setIndexedVariableResolver(int index, VariableResolver resolver)
VariableResolverFactory	setNextFactory(VariableResolverFactory resolverFactory) Sets the next factory in the chain.
void	setVariableResolvers(Map<String,VariableResolver> variableResolvers)
int	variableIndexOf(String name)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mvel2.integration.VariableResolverFactory

createVariable, createVariable, isResolveable, isTarget

Field Detail

variableResolvers

protected Map<String,VariableResolver> variableResolvers

nextFactory

protected VariableResolverFactory nextFactory

indexOffset

protected int indexOffset

indexedVariableNames

protected String[] indexedVariableNames

indexedVariableResolvers

protected VariableResolver[] indexedVariableResolvers

Constructor Detail

BaseVariableResolverFactory

public BaseVariableResolverFactory()

Method Detail

getNextFactory

public VariableResolverFactory getNextFactory()

Description copied from interface: VariableResolverFactory

Returns the next factory in the factory chain. MVEL uses a hierarchical variable resolution strategy, much in the same way as Classloaders in Java. For performance reasons, it is the responsibility of the individual VariableResolverFactory to pass off to the next one.

Specified by:

getNextFactory in interface VariableResolverFactory

Returns:

instance of the next factory - null if none.

setNextFactory

public VariableResolverFactory setNextFactory(VariableResolverFactory resolverFactory)

Description copied from interface: VariableResolverFactory

Sets the next factory in the chain. Proper implementation:

return this.nextFactory = resolverFactory;

Specified by:

setNextFactory in interface VariableResolverFactory

Parameters:

resolverFactory - - instance of next resolver factory

Returns:

- instance of next resolver factory

getVariableResolver

public VariableResolver getVariableResolver(String name)

Description copied from interface: VariableResolverFactory

Return a variable resolver for the specified variable name. This method is expected to traverse the heirarchy of ResolverFactories.

Specified by:

getVariableResolver in interface VariableResolverFactory

Parameters:

name - - variable name

Returns:

- instance of the VariableResolver for the specified variable

isNextResolveable

public boolean isNextResolveable(String name)

appendFactory

public void appendFactory(VariableResolverFactory resolverFactory)

insertFactory

public void insertFactory(VariableResolverFactory resolverFactory)

getKnownVariables

public Set<String> getKnownVariables()

Description copied from interface: VariableResolverFactory

Return a list of known variables inside the factory. This method should not recurse into other factories. But rather return only the variables living inside this factory.

Specified by:

getKnownVariables in interface VariableResolverFactory

Returns:

createIndexedVariable

public VariableResolver createIndexedVariable(int index,
                                     String name,
                                     Object value)

Specified by:

createIndexedVariable in interface VariableResolverFactory

getIndexedVariableResolver

public VariableResolver getIndexedVariableResolver(int index)

Specified by:

getIndexedVariableResolver in interface VariableResolverFactory

createIndexedVariable

public VariableResolver createIndexedVariable(int index,
                                     String name,
                                     Object value,
                                     Class<?> type)

Specified by:

createIndexedVariable in interface VariableResolverFactory

getVariableResolvers

public Map<String,VariableResolver> getVariableResolvers()

setVariableResolvers

public void setVariableResolvers(Map<String,VariableResolver> variableResolvers)

getIndexedVariableNames

public String[] getIndexedVariableNames()

setIndexedVariableNames

public void setIndexedVariableNames(String[] indexedVariableNames)

variableIndexOf

public int variableIndexOf(String name)

Specified by:

variableIndexOf in interface VariableResolverFactory

setIndexedVariableResolver

public VariableResolver setIndexedVariableResolver(int index,
                                          VariableResolver resolver)

Specified by:

setIndexedVariableResolver in interface VariableResolverFactory

isIndexedFactory

public boolean isIndexedFactory()

Specified by:

isIndexedFactory in interface VariableResolverFactory