org.jomc.modlet

Class ModelContext

java.lang.Object

org.jomc.modlet.ModelContext

Direct Known Subclasses:

DefaultModelContext

public abstract class ModelContext
extends Object

Model context interface.

Use Cases:

• createContext(java.lang.String)
• createContext(java.net.URI)
• createEntityResolver(java.lang.String)
• createEntityResolver(java.net.URI)
• createMarshaller(java.lang.String)
• createMarshaller(java.net.URI)
• createResourceResolver(java.lang.String)
• createResourceResolver(java.net.URI)
• createSchema(java.lang.String)
• createSchema(java.net.URI)
• createUnmarshaller(java.lang.String)
• createUnmarshaller(java.net.URI)
• findModel(java.lang.String)
• findModel(org.jomc.modlet.Model)
• processModel(org.jomc.modlet.Model)
• validateModel(org.jomc.modlet.Model)
• validateModel(java.lang.String, javax.xml.transform.Source)

Version:

$JOMC: ModelContext.java 4613 2012-09-22 10:07:08Z schulte $

Author:

Christian Schulte

See Also:

ModelContextFactory

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ModelContext.Listener Listener interface.

Constructor Summary

Constructors

Constructor and Description
ModelContext() Creates a new ModelContext instance.
ModelContext(ClassLoader classLoader) Creates a new ModelContext instance taking a class loader.

Method Summary

Methods

Modifier and Type	Method and Description
void	clearAttribute(String name) Removes an attribute from the context.
abstract JAXBContext	createContext(String model) Creates a new JAXB context instance of a given model.
abstract JAXBContext	createContext(URI publicId) Creates a new JAXB context instance for a given public identifier URI.
abstract EntityResolver	createEntityResolver(String model) Creates a new SAX entity resolver instance of a given model.
abstract EntityResolver	createEntityResolver(URI publicId) Creates a new SAX entity resolver instance for a given public identifier URI.
abstract Marshaller	createMarshaller(String model) Creates a new JAXB marshaller instance of a given model.
abstract Marshaller	createMarshaller(URI publicId) Creates a new JAXB marshaller instance for a given public identifier URI.
static ModelContext	createModelContext(ClassLoader classLoader) Deprecated. As of JOMC 1.2, replaced by method ModelContextFactory.newModelContext(java.lang.ClassLoader). This method will be removed in version 2.0.
abstract LSResourceResolver	createResourceResolver(String model) Creates a new L/S resource resolver instance of a given model.
abstract LSResourceResolver	createResourceResolver(URI publicId) Creates a new L/S resource resolver instance for a given public identifier URI.
abstract Schema	createSchema(String model) Creates a new JAXP schema instance of a given model.
abstract Schema	createSchema(URI publicId) Creates a new JAXP schema instance for a given public identifier URI.
abstract <T> T	createServiceObject(Service service, Class<T> type) Creates a new service object.
abstract Unmarshaller	createUnmarshaller(String model) Creates a new JAXB unmarshaller instance of a given model.
abstract Unmarshaller	createUnmarshaller(URI publicId) Creates a new JAXB unmarshaller instance for a given given public identifier URI.
Class<?>	findClass(String name) Searches the context for a class with a given name.
abstract Model	findModel(Model model) Populates a given Model instance.
abstract Model	findModel(String model) Creates a new Model instance.
abstract Modlets	findModlets() Searches the context for Modlets.
URL	findResource(String name) Searches the context for a resource with a given name.
Enumeration<URL>	findResources(String name) Searches the context for resources with a given name.
Object	getAttribute(String name) Gets an attribute of the context.
Object	getAttribute(String name, Object def) Gets an attribute of the context.
Set<String>	getAttributeNames() Gets a set holding the names of all attributes of the context.
ClassLoader	getClassLoader() Gets the class loader of the context.
static Level	getDefaultLogLevel() Gets the default log level events are logged at.
static String	getDefaultModletSchemaSystemId() Gets the default http://jomc.org/modlet namespace schema system id.
List<ModelContext.Listener>	getListeners() Gets the listeners of the context.
Level	getLogLevel() Gets the log level of the context.
static String	getModelContextClassName() Deprecated. As of JOMC 1.2, replaced by class ModelContextFactory. This method will be removed in version 2.0.
Modlets	getModlets() Gets the Modlets of the context.
String	getModletSchemaSystemId() Gets the http://jomc.org/modlet namespace schema system id of the context.
boolean	isLoggable(Level level) Checks if a message at a given level is provided to the listeners of the context.
void	log(Level level, String message, Throwable throwable) Notifies all listeners of the context.
abstract Model	processModel(Model model) Processes a Model.
Object	setAttribute(String name, Object value) Sets an attribute in the context.
static void	setDefaultLogLevel(Level value) Sets the default log level events are logged at.
static void	setDefaultModletSchemaSystemId(String value) Sets the default http://jomc.org/modlet namespace schema system id.
void	setLogLevel(Level value) Sets the log level of the context.
static void	setModelContextClassName(String value) Deprecated. As of JOMC 1.2, replaced by class ModelContextFactory. This method will be removed in version 2.0.
void	setModlets(Modlets value) Sets the Modlets of the context.
void	setModletSchemaSystemId(String value) Sets the http://jomc.org/modlet namespace schema system id of the context.
abstract ModelValidationReport	validateModel(Model model) Validates a given Model.
abstract ModelValidationReport	validateModel(String model, Source source) Validates a given model.

Methods inherited from class java.lang.Object

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

Constructor Detail

ModelContext

public ModelContext()

Creates a new ModelContext instance.

Since:

1.2

ModelContext

public ModelContext(ClassLoader classLoader)

Creates a new ModelContext instance taking a class loader.

Parameters:

classLoader - The class loader of the context.

See Also:

getClassLoader()

Method Detail

getAttributeNames

public Set<String> getAttributeNames()

Gets a set holding the names of all attributes of the context.

Returns:

An unmodifiable set holding the names of all attributes of the context.

Since:

1.2

See Also:

clearAttribute(java.lang.String), getAttribute(java.lang.String), getAttribute(java.lang.String, java.lang.Object), setAttribute(java.lang.String, java.lang.Object)

getAttribute

public Object getAttribute(String name)

Gets an attribute of the context.

Parameters:

name - The name of the attribute to get.

Returns:

The value of the attribute with name name; null if no attribute matching name is found.

Throws:

NullPointerException - if name is null.

See Also:

getAttribute(java.lang.String, java.lang.Object), setAttribute(java.lang.String, java.lang.Object), clearAttribute(java.lang.String)

getAttribute

public Object getAttribute(String name,
                  Object def)

Gets an attribute of the context.

Parameters:

name - The name of the attribute to get.

def - The value to return if no attribute matching name is found.

Returns:

The value of the attribute with name name; def if no such attribute is found.

Throws:

NullPointerException - if name is null.

See Also:

getAttribute(java.lang.String), setAttribute(java.lang.String, java.lang.Object), clearAttribute(java.lang.String)

setAttribute

public Object setAttribute(String name,
                  Object value)

Sets an attribute in the context.

Parameters:

name - The name of the attribute to set.

value - The value of the attribute to set.

Returns:

The previous value of the attribute with name name; null if no such value is found.

Throws:

NullPointerException - if name or value is null.

See Also:

getAttribute(java.lang.String), getAttribute(java.lang.String, java.lang.Object), clearAttribute(java.lang.String)

clearAttribute

public void clearAttribute(String name)

Removes an attribute from the context.

Parameters:

name - The name of the attribute to remove.

Throws:

NullPointerException - if name is null.

See Also:

getAttribute(java.lang.String), getAttribute(java.lang.String, java.lang.Object), setAttribute(java.lang.String, java.lang.Object)

getClassLoader

public ClassLoader getClassLoader()

Gets the class loader of the context.

Returns:

The class loader of the context or null, indicating the bootstrap class loader.

See Also:

findClass(java.lang.String), findResource(java.lang.String), findResources(java.lang.String)

getListeners

public List<ModelContext.Listener> getListeners()

Gets the listeners of the context.

This accessor method returns a reference to the live list, not a snapshot. Therefore any modification you make to the returned list will be present inside the object. This is why there is no set method for the listeners property.

Returns:

The list of listeners of the context.

See Also:

log(java.util.logging.Level, java.lang.String, java.lang.Throwable)

getDefaultModletSchemaSystemId

public static String getDefaultModletSchemaSystemId()

Gets the default http://jomc.org/modlet namespace schema system id.

The default http://jomc.org/modlet namespace schema system id is controlled by system property org.jomc.modlet.ModelContext.defaultModletSchemaSystemId holding a system id URI. If that property is not set, the http://xml.jomc.org/modlet/jomc-modlet-1.3.xsd default is returned.

Returns:

The default system id of the http://jomc.org/modlet namespace schema.

See Also:

setDefaultModletSchemaSystemId(java.lang.String)

setDefaultModletSchemaSystemId

public static void setDefaultModletSchemaSystemId(String value)

Sets the default http://jomc.org/modlet namespace schema system id.

Parameters:

value - The new default http://jomc.org/modlet namespace schema system id or null.

See Also:

getDefaultModletSchemaSystemId()

getModletSchemaSystemId

public final String getModletSchemaSystemId()

Gets the http://jomc.org/modlet namespace schema system id of the context.

Returns:

The http://jomc.org/modlet namespace schema system id of the context.

See Also:

getDefaultModletSchemaSystemId(), setModletSchemaSystemId(java.lang.String)

setModletSchemaSystemId

public final void setModletSchemaSystemId(String value)

Sets the http://jomc.org/modlet namespace schema system id of the context.

Parameters:

value - The new http://jomc.org/modlet namespace schema system id or null.

See Also:

getModletSchemaSystemId()

getDefaultLogLevel

public static Level getDefaultLogLevel()

Gets the default log level events are logged at.

The default log level is controlled by system property org.jomc.modlet.ModelContext.defaultLogLevel holding the log level to log events at by default. If that property is not set, the WARNING default is returned.

Returns:

The log level events are logged at by default.

See Also:

getLogLevel(), Level.parse(java.lang.String)

setDefaultLogLevel

public static void setDefaultLogLevel(Level value)

Sets the default log level events are logged at.

Parameters:

value - The new default level events are logged at or null.

See Also:

getDefaultLogLevel()

getLogLevel

public final Level getLogLevel()

Gets the log level of the context.

Returns:

The log level of the context.

See Also:

getDefaultLogLevel(), setLogLevel(java.util.logging.Level), isLoggable(java.util.logging.Level)

setLogLevel

public final void setLogLevel(Level value)

Sets the log level of the context.

Parameters:

value - The new log level of the context or null.

See Also:

getLogLevel(), isLoggable(java.util.logging.Level)

isLoggable

public boolean isLoggable(Level level)

Checks if a message at a given level is provided to the listeners of the context.

Parameters:

level - The level to test.

Returns:

true, if messages at level are provided to the listeners of the context; false, if messages at level are not provided to the listeners of the context.

Throws:

NullPointerException - if level is null.

See Also:

getLogLevel(), setLogLevel(java.util.logging.Level)

log

public void log(Level level,
       String message,
       Throwable throwable)

Notifies all listeners of the context.

Parameters:

level - The level of the event.

message - The message of the event or null.

throwable - The throwable of the event null.

Throws:

NullPointerException - if level is null.

See Also:

getListeners(), isLoggable(java.util.logging.Level)

getModlets

public final Modlets getModlets()
                         throws ModelException

Gets the Modlets of the context.

If no Modlets have been set using the setModlets method, this method calls the findModlets method to initialize the Modlets of the context.

This accessor method returns a reference to the live list, not a snapshot. Therefore any modification you make to the returned list will be present inside the object.

Returns:

The Modlets of the context.

Throws:

ModelException - if getting the Modlets of the context fails.

See Also:

setModlets(org.jomc.modlet.Modlets), findModlets()

setModlets

public final void setModlets(Modlets value)

Sets the Modlets of the context.

Parameters:

value - The new Modlets of the context or null.

See Also:

getModlets()

findClass

public Class<?> findClass(String name)
                   throws ModelException

Searches the context for a class with a given name.

Parameters:

name - The name of the class to search.

Returns:

A class object of the class with name name or null, if no such class is found.

Throws:

NullPointerException - if name is null.

ModelException - if searching fails.

See Also:

getClassLoader()

findResource

public URL findResource(String name)
                 throws ModelException

Searches the context for a resource with a given name.

Parameters:

name - The name of the resource to search.

Returns:

An URL object for reading the resource or null, if no such resource is found.

Throws:

NullPointerException - if name is null.

ModelException - if searching fails.

See Also:

getClassLoader()

findResources

public Enumeration<URL> findResources(String name)
                               throws ModelException

Searches the context for resources with a given name.

Parameters:

name - The name of the resources to search.

Returns:

An enumeration of URL objects for reading the resources. If no resources are found, the enumeration will be empty.

Throws:

NullPointerException - if name is null.

ModelException - if searching fails.

See Also:

getClassLoader()

findModlets

public abstract Modlets findModlets()
                             throws ModelException

Searches the context for Modlets.

Returns:

The Modlets found in the context.

Throws:

ModelException - if searching Modlets fails.

See Also:

META-INF/services/org.jomc.modlet.ModletProvider, getModlets()

findModel

public abstract Model findModel(String model)
                         throws ModelException

Creates a new Model instance.

Parameters:

model - The identifier of the Model to create.

Returns:

A new instance of the Model identified by model.

Throws:

NullPointerException - if model is null.

ModelException - if creating a new Model instance fails.

See Also:

createServiceObject( service, ModelProvider.class ), ModletObject.MODEL_PUBLIC_ID

findModel

public abstract Model findModel(Model model)
                         throws ModelException

Populates a given Model instance.

Parameters:

model - The Model to populate.

Returns:

The populated model.

Throws:

NullPointerException - if model is null.

ModelException - if populating model fails.

Since:

1.2

See Also:

createServiceObject( service, ModelProvider.class )

getModelContextClassName

@Deprecated
public static String getModelContextClassName()

Deprecated. As of JOMC 1.2, replaced by class ModelContextFactory. This method will be removed in version 2.0.

Gets the name of the class providing the default ModelContext implementation.

The name of the class providing the default ModelContext implementation returned by method createModelContext(java.lang.ClassLoader) is controlled by system property org.jomc.modlet.ModelContext.className. If that property is not set, the name of the DefaultModelContext class is returned.

Returns:

The name of the class providing the default ModelContext implementation.

See Also:

setModelContextClassName(java.lang.String)

setModelContextClassName

@Deprecated
public static void setModelContextClassName(String value)

Deprecated. As of JOMC 1.2, replaced by class ModelContextFactory. This method will be removed in version 2.0.

Sets the name of the class providing the default ModelContext implementation.

Parameters:

value - The new name of the class providing the default ModelContext implementation or null.

See Also:

getModelContextClassName()

createModelContext

public static ModelContext createModelContext(ClassLoader classLoader)
                                       throws ModelException

Deprecated. As of JOMC 1.2, replaced by method ModelContextFactory.newModelContext(java.lang.ClassLoader). This method will be removed in version 2.0.

Creates a new default ModelContext instance.

Parameters:

classLoader - The class loader to create a new default ModelContext instance with or null, to create a new context using the platform's bootstrap class loader.

Returns:

A new ModelContext instance.

Throws:

ModelException - if creating a new ModelContext instance fails.

See Also:

getModelContextClassName()

createServiceObject

public abstract <T> T createServiceObject(Service service,
                        Class<T> type)
                               throws ModelException

Creates a new service object.

Type Parameters:

T - The type of the service.

Parameters:

service - The service to create a new object of.

type - The class of the type of the service.

Returns:

An new service object for service.

Throws:

NullPointerException - if service or type is null.

ModelException - if creating the service object fails.

Since:

1.2

See Also:

ModelProvider, ModelProcessor, ModelValidator

createEntityResolver

public abstract EntityResolver createEntityResolver(String model)
                                             throws ModelException

Creates a new SAX entity resolver instance of a given model.

Parameters:

model - The identifier of the model to create a new SAX entity resolver of.

Returns:

A new SAX entity resolver instance of the model identified by model.

Throws:

NullPointerException - if model is null.

ModelException - if creating a new SAX entity resolver instance fails.

See Also:

ModletObject.MODEL_PUBLIC_ID

createEntityResolver

public abstract EntityResolver createEntityResolver(URI publicId)
                                             throws ModelException

Creates a new SAX entity resolver instance for a given public identifier URI.

Parameters:

publicId - The public identifier URI to create a new SAX entity resolver for.

Returns:

A new SAX entity resolver instance for the public identifier URI publicId.

Throws:

NullPointerException - if publicId is null.

ModelException - if creating a new SAX entity resolver instance fails.

Since:

1.2

See Also:

ModletObject.PUBLIC_ID

createResourceResolver

public abstract LSResourceResolver createResourceResolver(String model)
                                                   throws ModelException

Creates a new L/S resource resolver instance of a given model.

Parameters:

model - The identifier of the model to create a new L/S resource resolver of.

Returns:

A new L/S resource resolver instance of the model identified by model.

Throws:

NullPointerException - if model is null.

ModelException - if creating a new L/S resource resolver instance fails.

See Also:

ModletObject.MODEL_PUBLIC_ID

createResourceResolver

public abstract LSResourceResolver createResourceResolver(URI publicId)
                                                   throws ModelException

Creates a new L/S resource resolver instance for a given public identifier URI.

Parameters:

publicId - The public identifier URI to create a new L/S resource resolver for.

Returns:

A new L/S resource resolver instance for the public identifier URI publicId.

Throws:

NullPointerException - if publicId is null.

ModelException - if creating a new L/S resource resolver instance fails.

Since:

1.2

See Also:

ModletObject.PUBLIC_ID

createSchema

public abstract Schema createSchema(String model)
                             throws ModelException

Creates a new JAXP schema instance of a given model.

Parameters:

model - The identifier of the model to create a new JAXP schema instance of.

Returns:

A new JAXP schema instance of the model identified by model.

Throws:

NullPointerException - if model is null.

ModelException - if creating a new JAXP schema instance fails.

See Also:

ModletObject.MODEL_PUBLIC_ID

createSchema

public abstract Schema createSchema(URI publicId)
                             throws ModelException

Creates a new JAXP schema instance for a given public identifier URI.

Parameters:

publicId - The public identifier URI to create a new JAXP schema instance for.

Returns:

A new JAXP schema instance for the public identifier URI publicId.

Throws:

NullPointerException - if publicId is null.

ModelException - if creating a new JAXP schema instance fails.

Since:

1.2

See Also:

ModletObject.PUBLIC_ID

createContext

public abstract JAXBContext createContext(String model)
                                   throws ModelException

Creates a new JAXB context instance of a given model.

Parameters:

model - The identifier of the model to create a new JAXB context instance of.

Returns:

A new JAXB context instance of the model identified by model.

Throws:

NullPointerException - if model is null.

ModelException - if creating a new JAXB context instance fails.

See Also:

ModletObject.MODEL_PUBLIC_ID

createContext

public abstract JAXBContext createContext(URI publicId)
                                   throws ModelException

Creates a new JAXB context instance for a given public identifier URI.

Parameters:

publicId - The public identifier URI to create a new JAXB context instance for.

Returns:

A new JAXB context instance for the public identifier URI publicId.

Throws:

NullPointerException - if publicId is null.

ModelException - if creating a new JAXB context instance fails.

Since:

1.2

See Also:

ModletObject.PUBLIC_ID

createMarshaller

public abstract Marshaller createMarshaller(String model)
                                     throws ModelException

Creates a new JAXB marshaller instance of a given model.

Parameters:

model - The identifier of the model to create a new JAXB marshaller instance of.

Returns:

A new JAXB marshaller instance of the model identified by model.

Throws:

NullPointerException - if model is null.

ModelException - if creating a new JAXB marshaller instance fails.

See Also:

ModletObject.MODEL_PUBLIC_ID

createMarshaller

public abstract Marshaller createMarshaller(URI publicId)
                                     throws ModelException

Creates a new JAXB marshaller instance for a given public identifier URI.

Parameters:

publicId - The public identifier URI to create a new JAXB marshaller instance for.

Returns:

A new JAXB marshaller instance for the public identifier URI publicId.

Throws:

NullPointerException - if publicId is null.

ModelException - if creating a new JAXB marshaller instance fails.

Since:

1.2

See Also:

ModletObject.PUBLIC_ID

createUnmarshaller

public abstract Unmarshaller createUnmarshaller(String model)
                                         throws ModelException

Creates a new JAXB unmarshaller instance of a given model.

Parameters:

model - The identifier of the model to create a new JAXB unmarshaller instance of.

Returns:

A new JAXB unmarshaller instance of the model identified by model.

Throws:

NullPointerException - if model is null.

ModelException - if creating a new JAXB unmarshaller instance fails.

See Also:

ModletObject.MODEL_PUBLIC_ID

createUnmarshaller

public abstract Unmarshaller createUnmarshaller(URI publicId)
                                         throws ModelException

Creates a new JAXB unmarshaller instance for a given given public identifier URI.

Parameters:

publicId - The public identifier URI to create a new JAXB unmarshaller instance for.

Returns:

A new JAXB unmarshaller instance for the public identifier URI publicId.

Throws:

NullPointerException - if publicId is null.

ModelException - if creating a new JAXB unmarshaller instance fails.

Since:

1.2

See Also:

ModletObject.PUBLIC_ID

processModel

public abstract Model processModel(Model model)
                            throws ModelException

Processes a Model.

Parameters:

model - The Model to process.

Returns:

The processed Model.

Throws:

NullPointerException - if model is null.

ModelException - if processing model fails.

See Also:

createServiceObject( service, ModelProcessor.class )

validateModel

public abstract ModelValidationReport validateModel(Model model)
                                             throws ModelException

Validates a given Model.

Parameters:

model - The Model to validate.

Returns:

Validation report.

Throws:

NullPointerException - if model is null.

ModelException - if validating the modules fails.

See Also:

createServiceObject( service, ModelValidator.class ), ModelValidationReport.isModelValid()

validateModel

public abstract ModelValidationReport validateModel(String model,
                                  Source source)
                                             throws ModelException

Validates a given model.

Parameters:

model - The identifier of the Model to use for validating source.

source - A source providing the model to validate.

Returns:

Validation report.

Throws:

NullPointerException - if model or source is null.

ModelException - if validating the model fails.

See Also:

createSchema(java.lang.String), ModelValidationReport.isModelValid(), ModletObject.MODEL_PUBLIC_ID