org.milyn.cdr
Class SmooksResourceConfiguration

java.lang.Object
  org.milyn.cdr.SmooksResourceConfiguration

public class SmooksResourceConfiguration
extends Object

Smooks Resource Targeting Configuration.

A Content Delivery Resource is anything that can be used by Smooks in the process of analysing or transforming a data stream. They could be pieces of Java logic (DOMElementVisitor, SerializationUnit), some text or script resource, or perhaps simply a configuration parameter (see ParameterAccessor).

What is Resource Targeting?

Smooks works by "targeting" resources at message transformation/analysis processes. It targets resources at message profiles, and then message fragments (or other aspects of the transformation/analysis process) within that message profile. This typically means targeting a piece of tranformation logic (XSLT, Java, Groovy etc) at a specific type of message ("base profile"), and then at a specific fragment of that message. The fragment may include as much or as little of the document as required. Smooks also allows you to target multilpe resources at the same fragment (see SmooksResourceConfigurationSortComparator).

Note you don't have to use message profiling. You can simply create a set of configurations that are only targeted at message fragments (no profiling info), supply them to a Smooks instance and then use an ExecutionContext instance that's not based on a profile (see Smooks.createExecutionContext()). This is definitely the easiest way to start using Smooks.

Resource Targeting Configurations

Smooks can be manually configured (through code), but the easiest way of working is through XML. The follwoing are a few sample configurations. Explanations follow the samples.

A basic sample. Note that it is not using any profiling. The resource-config element maps directly to an instance of this class.

 <?xml version='1.0'?>
 <smooks-resource-list xmlns="http://www.milyn.org/xsd/smooks-1.0.xsd">
      <resource-config selector="order/order-header">
          <resource type="xsl">/com/acme/transform/OrderHeaderTransformer.xsl</resource>
      </resource-config>
      <resource-config selector="order-items/order-item">
          <resource>com.acme.transform.MyJavaOrderItemTransformer</resource>
      </resource-config>
 </smooks-resource-list>

A more complex sample, using profiling. So resource 1 is targeted at both "message-exchange-1" and "message-exchange-2", whereas resource 2 is only targeted at "message-exchange-1" and resource 3 at "message-exchange-2" (see Smooks.createExecutionContext(String)).

 <?xml version='1.0'?>
 <smooks-resource-list xmlns="http://www.milyn.org/xsd/smooks-1.0.xsd">
      <profiles>
          <profile base-profile="message-exchange-1" sub-profiles="message-producer-A, message-consumer-B" />
          <profile base-profile="message-exchange-2" sub-profiles="message-producer-A, message-consumer-C" />
      </profiles>
 (1)  <resource-config selector="order/order-header" target-profile="message-producer-A">
          <resource>com.acme.transform.AddIdentityInfo</resource>
      </resource-config>
 (2)  <resource-config selector="order-items/order-item" target-profile="message-consumer-B">
          <resource>com.acme.transform.MyJavaOrderItemTransformer</resource>
          <param name="execution-param-X">param-value-forB</param>
      </resource-config>
 (3)  <resource-config selector="order-items/order-item" target-profile="message-consumer-C">
          <resource>com.acme.transform.MyJavaOrderItemTransformer</resource>
          <param name="execution-param-X">param-value-forC</param>
      </resource-config>
 </smooks-resource-list>

Attribute Definitions

• target-profile: A list of 1 or more profile targeting expressions. (supports wildcards "*").

• selector: Selector string. Used by Smooks to "lookup" a resource configuration. This is typically the message fragment name, but as mentioned above, not all resources are transformation/analysis resources targeted at a message fragment - this is why we didn't call this attribute "target-fragment". This attribute supports a list of comma separated selectors, allowing you to target a single resource at multiple selector (e.g. fragments).
  Example selectors:
  1. The target fragment name (e.g. for HTML - table, tr, pre etc). This type of selector can be contextual e.g. "x/y/z" will target the resource at all "z" fragments nested inside a "y" fragment, which is in turn nested inside an "x" fragment. Also supports CSS style selectors e.g. "td ol li". See sample configurations above. Also supports wildcard based fragment selection ("*").
  2. "$document" is a special selector that targets a resource at the "document" fragment i.e. the whole document, or document root node fragment.
  3. Targeting a specific SmooksXMLReader at a specific profile.

• selector-namespace: The XML namespace of the selector target for this resource. This is used to target ContentHandlers at XML elements from a specific XML namespace e.g. "http://www.w3.org/2002/xforms". If not defined, the resource is targeted at all namespces.

Resource Targeting Configurations

Author:

tom.fennelly@gmail.com

See Also:

SmooksResourceConfigurationSortComparator

Field Summary

static String	DOCUMENT_FRAGMENT_SELECTOR A special selector for resource targeted at the document as a whole (the roor element).
static String	PARAM_RESDATA Deprecated. Resource now specified on <resource> element. Since Configuration DTD v2.0.
static String	PARAM_RESTYPE Deprecated. Resource type now specified on "type" attribute of <resource> element. Since Configuration DTD v2.0.
static String	XML_DEF_PREFIX XML selector type definition prefix

Constructor Summary

SmooksResourceConfiguration()
Public default constructor.

SmooksResourceConfiguration(String selector)
Public constructor.

SmooksResourceConfiguration(String selector, String resource)
Public constructor.

SmooksResourceConfiguration(String selector, String targetProfile, String resource)
Public constructor.

SmooksResourceConfiguration(String selector, String selectorNamespaceURI, String targetProfile, String resource)
Public constructor.

Method Summary

Object	clone() Perform a shallow clone of this configuration.
boolean	getBoolParameter(String name, boolean defaultVal) Get the named SmooksResourceConfiguration parameter as a boolean.
byte[]	getBytes() Get the resource as a byte array.
ExpressionEvaluator	getConditionEvaluator() Get the condition evaluator used in targeting of this resource.
String[]	getContextualSelector() Get the contextual selector definition for this SmooksResourceConfiguration.
Parameter	getParameter(String name) Get the named SmooksResourceConfiguration parameter.
int	getParameterCount() Get the SmooksResourceConfiguration parameter count.
List	getParameterList() Get all parameter values set on this configuration.
Map<String,Object>	getParameters() Get the param map associated with this configuration.
List	getParameters(String name) Get the named SmooksResourceConfiguration parameter List.
ProfileTargetingExpression[]	getProfileTargetingExpressions() Get the profile targeting expressions for this SmooksResourceConfiguration.
String	getResource() Get the resource for this SmooksResourceConfiguration.
String	getResourceType() Get the resource "type" for this resource.
String	getSelector() Get the selector definition for this SmooksResourceConfiguration.
String	getSelectorNamespaceURI() The the selector namespace URI.
String	getStringParameter(String name) Get the named SmooksResourceConfiguration parameter.
String	getStringParameter(String name, String defaultVal) Get the named SmooksResourceConfiguration parameter.
String	getTargetElement() Get the name of the target element where the selector is targeting the resource at an XML element.
String	getTargetProfile() Get the target profile string as set in the configuration.
boolean	isDefaultResource() Is this resource config a default applied resource.
boolean	isInline() Is this resource defined inline in the configuration, or is it referenced through a URI.
boolean	isJavaContentHandler() Is this resource a Java ContentHandler resource.
boolean	isJavaResource() Does this resource configuration refer to a Java Class resource.
boolean	isSelectorContextual() Is the resource selector contextual.
boolean	isTargetedAtElement(Element element) Is this configuration targeted at the supplied DOM element.
boolean	isTargetedAtElement(SAXElement element) Is this configuration targeted at the supplied SAX element.
boolean	isTargetedAtElementContext(Element element) Is this resource configuration targeted at the specified DOM element in context.
boolean	isTargetedAtElementContext(SAXElement element) Is this resource configuration targeted at the specified SAX element in context.
boolean	isTargetedAtNamespace(String namespace) Is this resource configuration targets at the same namespace as the specified elemnt.
boolean	isXmlDef() Is this selector defininition an XML based definition.
static String[]	parseSelector(String selector)
void	removeParameter(String name) Remove the named parameter.
void	setConditionEvaluator(ExpressionEvaluator expressionEvaluator) Set the condition evaluator to be used in targeting of this resource.
void	setDefaultResource(boolean defaultResource) Set this resource config as a default applied resource.
void	setParameter(Parameter parameter)
Parameter	setParameter(String name, String value) Set the named SmooksResourceConfiguration parameter value (default type - String).
Parameter	setParameter(String name, String type, String value) Set the named SmooksResourceConfiguration parameter value (with type).
void	setResource(String resource) Set the configs "resource".
void	setResourceType(String resourceType) Explicitly set the resource type.
void	setSelector(String selector) Set the config selector.
void	setSelectorNamespaceURI(String namespaceURI) Set the namespace URI to which the selector is associated.
void	setTargetProfile(String targetProfile) Set the configs "target profile".
Class	toJavaResource() Returns the resource as a Java Class instance.
String	toString()
String	toXML() Generate an XML'ified description of this resource.

Methods inherited from class java.lang.Object

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

Field Detail

PARAM_RESTYPE

public static final String PARAM_RESTYPE

Deprecated. Resource type now specified on "type" attribute of <resource> element. Since Configuration DTD v2.0.

The resource type can be specified as a resource parameter. This constant defines that parameter name.

See Also:

Constant Field Values

PARAM_RESDATA

public static final String PARAM_RESDATA

Deprecated. Resource now specified on <resource> element. Since Configuration DTD v2.0.

The resource data can be specified as a resource parameter. This constant defines that parameter name.

See Also:

Constant Field Values

XML_DEF_PREFIX

public static final String XML_DEF_PREFIX

XML selector type definition prefix

DOCUMENT_FRAGMENT_SELECTOR

public static final String DOCUMENT_FRAGMENT_SELECTOR

A special selector for resource targeted at the document as a whole (the roor element).

See Also:

Constant Field Values

Constructor Detail

SmooksResourceConfiguration

public SmooksResourceConfiguration()

Public default constructor.

See Also:

setSelector(String), setSelectorNamespaceURI(String), setTargetProfile(String), setResource(String), setResourceType(String), setParameter(String, String)

SmooksResourceConfiguration

public SmooksResourceConfiguration(String selector)

Public constructor.

Parameters:

selector - The selector definition.

See Also:

setSelectorNamespaceURI(String), setTargetProfile(String), setResource(String), setResourceType(String), setParameter(String, String)

SmooksResourceConfiguration

public SmooksResourceConfiguration(String selector,
                                   String resource)

Public constructor.

Parameters:

selector - The selector definition.

resource - The resource.

See Also:

setSelectorNamespaceURI(String), setTargetProfile(String), setResourceType(String), setParameter(String, String)

SmooksResourceConfiguration

public SmooksResourceConfiguration(String selector,
                                   String targetProfile,
                                   String resource)

Public constructor.

Parameters:

selector - The selector definition.

targetProfile - Target Profile(s). Comma separated list of ProfileTargetingExpressions.

resource - The resource.

See Also:

setSelectorNamespaceURI(String), setResourceType(String), setParameter(String, String)

SmooksResourceConfiguration

public SmooksResourceConfiguration(String selector,
                                   String selectorNamespaceURI,
                                   String targetProfile,
                                   String resource)

Public constructor.

Parameters:

selector - The selector definition.

selectorNamespaceURI - The selector namespace URI.

targetProfile - Target Profile(s). Comma separated list of ProfileTargetingExpressions.

resource - The resource.

See Also:

setResourceType(String), setParameter(String, String)

Method Detail

clone

public Object clone()

Perform a shallow clone of this configuration.

Overrides:

clone in class Object

Returns:

Configuration clone.

setSelector

public void setSelector(String selector)

Set the config selector.

Parameters:

selector - The selector definition.

parseSelector

public static String[] parseSelector(String selector)

setSelectorNamespaceURI

public void setSelectorNamespaceURI(String namespaceURI)

Set the namespace URI to which the selector is associated.

Parameters:

namespaceURI - Selector namespace.

setResource

public void setResource(String resource)

Set the configs "resource".

Parameters:

resource - The resource.

isInline

public boolean isInline()

Is this resource defined inline in the configuration, or is it referenced through a URI.

Note that this method also returns false if the resource is undefined (null).

Returns:

True if the resource is defined inline, otherwise false.

getTargetProfile

public String getTargetProfile()

Get the target profile string as set in the configuration.

Returns:

The target profile.

setTargetProfile

public void setTargetProfile(String targetProfile)

Set the configs "target profile".

Parameters:

targetProfile - Target Profile(s). Comma separated list of ProfileTargetingExpressions.

setResourceType

public void setResourceType(String resourceType)

Explicitly set the resource type.

E.g. "class", "xsl", "groovy" etc.

Parameters:

resourceType - The resource type.

getSelector

public String getSelector()

Get the selector definition for this SmooksResourceConfiguration.

Returns:

The selector definition.

getContextualSelector

public String[] getContextualSelector()

Get the contextual selector definition for this SmooksResourceConfiguration.

See details about the "selector" attribute in the Attribute Definitions section.

Returns:

The contxtual selector definition.

getTargetElement

public String getTargetElement()

Get the name of the target element where the selector is targeting the resource at an XML element.

Accomodates the fact that element based selectors can be contextual. This method is not relevant where the selector is not targeting an XML element.

See details about the "selector" attribute in the Attribute Definitions section.

Returns:

The target XML element name.

getSelectorNamespaceURI

public String getSelectorNamespaceURI()

The the selector namespace URI.

Returns:

The XML namespace URI of the element to which this configuration applies, or null if not namespaced.

getProfileTargetingExpressions

public ProfileTargetingExpression[] getProfileTargetingExpressions()

Get the profile targeting expressions for this SmooksResourceConfiguration.

Returns:

The profile targeting expressions.

getResource

public String getResource()

Get the resource for this SmooksResourceConfiguration.

Returns:

The cdrar path.

setConditionEvaluator

public void setConditionEvaluator(ExpressionEvaluator expressionEvaluator)

Set the condition evaluator to be used in targeting of this resource.

Parameters:

expressionEvaluator - The ExpressionEvaluator, or null if no condition is to be used.

getConditionEvaluator

public ExpressionEvaluator getConditionEvaluator()

Get the condition evaluator used in targeting of this resource.

Returns:

The ExpressionEvaluator, or null if no condition is specified.

isDefaultResource

public boolean isDefaultResource()

Is this resource config a default applied resource.

Some resources (e.g. DefaultSerializationUnit or DefaultSAXElementSerializer) are applied by default when no other resources are targeted at an element.

Returns:

True if this is a default applied resource, otherwise false.

setDefaultResource

public void setDefaultResource(boolean defaultResource)

Set this resource config as a default applied resource.

Some resources (e.g. DefaultSerializationUnit or DefaultSAXElementSerializer) are applied by default when no other resources are targeted at an element.

Parameters:

defaultResource - True if this is a default applied resource, otherwise false.

getResourceType

public String getResourceType()

Get the resource "type" for this resource.

Determines the type through the following checks (in order):

1. Is it a Java resource. See isJavaResource(). If it is, return "class".
2. Is the "restype" resource paramater specified. If it is, return it's value. Ala DTD v1.0
3. Is the resource type explicitly set on this configuration. If it is, return it's value. Ala the "type" attribute on the resource element on DTD v2.0
4. Return the resource path file extension e.g. "xsl".

Returns:

setParameter

public Parameter setParameter(String name,
                              String value)

Set the named SmooksResourceConfiguration parameter value (default type - String).

Overwrites previous value of the same name.

Parameters:

name - Parameter name.

value - Parameter value.

Returns:

The parameter instance.

setParameter

public Parameter setParameter(String name,
                              String type,
                              String value)

Set the named SmooksResourceConfiguration parameter value (with type).

Overwrites previous value of the same name.

Parameters:

name - Parameter name.

type - Parameter type.

value - Parameter value.

Returns:

The parameter instance.

setParameter

public void setParameter(Parameter parameter)

getParameter

public Parameter getParameter(String name)

Get the named SmooksResourceConfiguration parameter.

If there is more than one of the named parameters defined, the first defined value is returned.

Parameters:

name - Name of parameter to get.

Returns:

Parameter value, or null if not set.

getParameters

public Map<String,Object> getParameters()

Get the param map associated with this configuration.

Returns:

The configuration parameters. The Map value is either a Parameter or parameter list (List<Parameter>).

getParameterList

public List getParameterList()

Get all parameter values set on this configuration.

Returns:

Parameter value List, or null if not set.

getParameters

public List getParameters(String name)

Get the named SmooksResourceConfiguration parameter List.

Parameters:

name - Name of parameter to get.

Returns:

Parameter value List, or null if not set.

getStringParameter

public String getStringParameter(String name)

Get the named SmooksResourceConfiguration parameter.

Parameters:

name - Name of parameter to get.

Returns:

Parameter value, or null if not set.

getStringParameter

public String getStringParameter(String name,
                                 String defaultVal)

Get the named SmooksResourceConfiguration parameter.

Parameters:

name - Name of parameter to get.

defaultVal - The default value to be returned if there are no parameters on the this SmooksResourceConfiguration instance, or the parameter is not defined.

Returns:

Parameter value, or defaultVal if not defined.

getBoolParameter

public boolean getBoolParameter(String name,
                                boolean defaultVal)

Get the named SmooksResourceConfiguration parameter as a boolean.

Parameters:

name - Name of parameter to get.

defaultVal - The default value to be returned if there are no parameters on the this SmooksResourceConfiguration instance, or the parameter is not defined.

Returns:

true if the parameter is set to true, defaultVal if not defined, otherwise false.

getParameterCount

public int getParameterCount()

Get the SmooksResourceConfiguration parameter count.

Returns:

Number of parameters defined on this SmooksResourceConfiguration.

removeParameter

public void removeParameter(String name)

Remove the named parameter.

Parameters:

name - The name of the parameter to be removed.

isXmlDef

public boolean isXmlDef()

Is this selector defininition an XML based definition.

I.e. is the selector attribute value prefixed with "xmldef:".

Returns:

True if this selector defininition is an XML based definition, otherwise false.

toString

public String toString()

Overrides:

toString in class Object

getBytes

public byte[] getBytes()

Get the resource as a byte array.

If the resource data is not inlined in the configuration (in a "resdata" param), it will be resolved using the URIResourceLocator i.e. the path will be enterpretted as a URI. If the resource doesn't resolve to a stream producing URI, the resource string will be converted to bytes and returned.

Returns:

The resource as a byte array, or null if resource path is null or the resource doesn't exist.

toJavaResource

public Class toJavaResource()

Returns the resource as a Java Class instance.

Returns:

The Java Class instance refered to be this resource configuration, or null if the resource doesn't refer to a Java Class.

isJavaResource

public boolean isJavaResource()

Does this resource configuration refer to a Java Class resource.

Returns:

True if this resource configuration refers to a Java Class resource, otherwise false.

isJavaContentHandler

public boolean isJavaContentHandler()

Is this resource a Java ContentHandler resource.

Returns:

True if this resource refers to an instance of the ContentHandler class, otherwise false.

isTargetedAtNamespace

public boolean isTargetedAtNamespace(String namespace)

Is this resource configuration targets at the same namespace as the specified elemnt.

Parameters:

namespace - The element to check against.

Returns:

True if this resource config is targeted at the element namespace, or if the resource is not targeted at any namespace (i.e. not specified), otherwise false.

isSelectorContextual

public boolean isSelectorContextual()

Is the resource selector contextual.

See details about the "selector" attribute in the Attribute Definitions section.

Returns:

True if the selector is contextual, otherwise false.

isTargetedAtElementContext

public boolean isTargetedAtElementContext(Element element)

Is this resource configuration targeted at the specified DOM element in context.

See details about the "selector" attribute in the Attribute Definitions section.

Note this doesn't perform any namespace checking.

Parameters:

element - The element to check against.

Returns:

True if this resource configuration is targeted at the specified element in context, otherwise false.

isTargetedAtElementContext

public boolean isTargetedAtElementContext(SAXElement element)

Is this resource configuration targeted at the specified SAX element in context.

See details about the "selector" attribute in the Attribute Definitions section.

Note this doesn't perform any namespace checking.

Parameters:

element - The element to check against.

Returns:

True if this resource configuration is targeted at the specified element in context, otherwise false.

isTargetedAtElement

public boolean isTargetedAtElement(Element element)

Is this configuration targeted at the supplied DOM element.

Checks that the element is in the correct namespace and is a contextual match for the configuration.

Parameters:

element - The element to be checked.

Returns:

True if this configuration is targeted at the supplied element, otherwise false.

isTargetedAtElement

public boolean isTargetedAtElement(SAXElement element)

Is this configuration targeted at the supplied SAX element.

Checks that the element is in the correct namespace and is a contextual match for the configuration.

Parameters:

element - The element to be checked.

Returns:

True if this configuration is targeted at the supplied element, otherwise false.

toXML

public String toXML()

Generate an XML'ified description of this resource.

Returns:

XML'ified description of the resource.