Package com.tangosol.config.xml

Interface ProcessingContext

All Superinterfaces:
ResourceResolver
All Known Implementing Classes:
DefaultProcessingContext
public interface ProcessingContext extends ResourceResolver
A ProcessingContext provides contextual information concerning the processing of content in an xml document.

ProcessingContexts additionally provide mechanisms to:

  1. Request processing of other, typically sub xml content, like child XmlElements.
  2. Access the ResourceRegistry provided to the DocumentProcessor associated with the XmlDocument being processed.
  3. Access the ParameterResolver provided to the DocumentProcessor associated with the XmlDocument being processed.
  4. Define additional contextual state (such as cookies) that may be used for injecting values into beans during processing.
  5. Define specialized ElementProcessors and AttributeProcessors that may be used for processing and injecting beans in the ProcessingContext.
Since:
Coherence 12.1.2
Author:
bo 2011.06.15

  • Method Details

    • getResourceRegistry

      ResourceRegistry getResourceRegistry()
      Obtains the ResourceRegistry associated with the ProcessingContext.
      Returns:
      a ResourceRegistry

    • getContextClassLoader

      ClassLoader getContextClassLoader()
      Obtains the ClassLoader to use for loading classes in the ProcessingContext.
      Returns:
      ClassLoader

    • getDefaultParameterResolver

      ParameterResolver getDefaultParameterResolver()
      Obtains the ParameterResolver to use for resolving parameters defined externally to the document being processed (ie: the operating system or container)
      Returns:
      the default ParameterResolver.

    • addCookie

      <T> void addCookie(Class<T> clzCookie, String sCookieName, T cookie)
      Adds the specified named and typed cookie to the ProcessingContext.

      If a cookie with the same name and type exists in the ProcessingContext, it will be replaced by the specified cookie. If a cookie with the same name and type has been defined in an outer ProcessingContext, the specified cookie will hide the cookie defined in the outer ProcessingContext.

      Type Parameters:
      T - the type of the cookie
      Parameters:
      clzCookie - the class of the cookie
      sCookieName - the name of the cookie
      cookie - the cookie value

    • addCookie

      <T> void addCookie(Class<T> clzCookie, T cookie)
      Adds the specified cookie to the ProcessingContext.

      If a cookie of the same type and name (being the name of the class of the said cookie) is already registered with the ProcessingContext, it will be replaced by the specified cookie.

      If a cookie of the same type and name has been defined in an outer ProcessingContext, the specified cookie will hide the cookie defined in the outer ProcessingContext.

      This method is equivalent to calling: addCookie(clz, clz.getName(), cookie);

      Type Parameters:
      T - the type of the cookie
      Parameters:
      clzCookie - the class of the cookie
      cookie - the cookie value

    • getCookie

      <T> T getCookie(Class<T> clzCookie, String sCookieName)
      Locates and returns the cookie with the specified type and name.

      Locating the cookie involves searching the current ProcessingContext for a matching cookie. If one is not found, the search continues with outer ProcessingContexts until a cookie is either located or there are no more ProcessingContexts, in which case null is returned.

      Type Parameters:
      T - the type of the cookie
      Parameters:
      clzCookie - the class of the cookie
      sCookieName - the name of the cookie
      Returns:
      the cookie or null if not defined

    • getCookie

      <T> T getCookie(Class<T> clzCookie)
      Locates and returns the cookie with the specified type.

      Locating the cookie involves searching the current ProcessingContext for a matching cookie. If one is not found, the search continues with outer ProcessingContexts until a cookie is either located or there are no more ProcessingContexts, in which case null is returned.

      This method is equivalent to calling: getCookie(clz, clz.getName());

      Type Parameters:
      T - the type of the cookie
      Parameters:
      clzCookie - the class of the cookie
      Returns:
      the cookie or null if not defined

    • definePropertyPath

      void definePropertyPath(String sBeanPropertyName, String sXmlPath)
      Defines the xml path to locate a specific Java Bean property with in an XmlElement in the ProcessingContext.

      This method allows "alias" paths for Java Bean properties to be defined so that inject(Object, XmlElement) calls may resolve property values correctly.

      This is an advanced feature. Typically this is only used when:

      1. A Java Bean property name does not match a named value, XmlElement or XmlAttribute with in a ProcessingContext.
      2. A Java Bean property can not be located with in the ProcessingContext.
      Parameters:
      sBeanPropertyName - the property name of the bean
      sXmlPath - the xmlPath to the property value

    • registerProcessor

      <T> void registerProcessor(Class<T> clzType, AttributeProcessor<T> processor)
      Registers an AttributeProcessor that may be used to process specific types of values contained in XmlAttributes with in the ProcessingContext.

      When an AttributeProcessor isn't provided by the associated NamespaceHandler for an XmlAttribute, an attempt is made to use a type specific AttributeProcessor to process an XmlAttribute for injection (with inject(Object, XmlElement)).

      Type Parameters:
      T - the type
      Parameters:
      clzType - the Class type
      processor - the AttributeProcessor for the type

    • registerProcessor

      <T> void registerProcessor(Class<T> clzType, ElementProcessor<T> processor)
      Registers an ElementProcessor that may be used to process specific types of values contained in XmlElements with in the ProcessingContext.

      When an ElementProcessor isn't provided by the associated NamespaceHandler for an XmlElement, an attempt is made to use a type specific ElementProcessor to process an XmlElement for injection (with inject(Object, XmlElement)).

      Type Parameters:
      T - the type
      Parameters:
      clzType - the Class type
      processor - the ElementProcessor for the type

    • registerAttributeType

      <T> void registerAttributeType(Class<T> clzType)
      Automatically creates and registers an AttributeProcessor for the specified type.

      Note: This assumes the type supports a String-based or XmlAttribute-based constructor.

      Type Parameters:
      T - the type
      Parameters:
      clzType - the type for which to create and register an AttributeProcessor

    • registerElementType

      <T> void registerElementType(Class<T> clzType)
      Automatically creates and registers an ElementProcessor for the specified type.

      Note: This assumes the type supports a String-based or XmlElement-based constructor.

      Type Parameters:
      T - the type
      Parameters:
      clzType - the type for which to create and register an ElementProcessor

    • getExpressionParser

      ExpressionParser getExpressionParser()
      Obtains the configured ExpressionParser for this ProcessingContext.
      Returns:
      the ExpressionParser

    • ensureNamespaceHandler

      NamespaceHandler ensureNamespaceHandler(String sPrefix, URI uri)
      Ensures that an NamespaceHandler with the specified URI is available for use in the ProcessingContext with the specified prefix. If a NamespaceHandler with the specified prefix and URI is not defined by the ProcessingContext, one is instantiated, registered and returned.
      Parameters:
      sPrefix - the prefix of the Xml Namespace to use for the NamespaceHandler
      uri - the URI detailing the location of the NamespaceHandler. Typically this will be a java class URI, specified as "class://fully.qualified.class.name"
      Returns:
      an instance of the NamespaceHandler that is suitable for processing the prefix and URI
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • ensureNamespaceHandler

      NamespaceHandler ensureNamespaceHandler(String sPrefix, NamespaceHandler handler)
      Ensures that the specified NamespaceHandler for the specified prefix is defined in this ProcessingContext.

      If a NamespaceHandler for the prefix does not exist in the ProcessingContext, it is added. Otherwise the existing NamespaceHandler for the prefix is returned.

      Parameters:
      sPrefix - the prefix of the xml Namespace to be associated with the NamespaceHandler
      handler - the NamespaceHandler
      Returns:
      the registered NamespaceHandler for the ProcessingContext

    • loadNamespaceHandlers

      void loadNamespaceHandlers(XmlElement xmlElement)
      Load all the custom NamespaceHandler instances for the specified XmlElement.
      Parameters:
      xmlElement - the XmlElement to load NamespaceHandler instances for
      Throws:
      NullPointerException - if the xmlElement parameter is null

    • getNamespaceHandler

      NamespaceHandler getNamespaceHandler(URI uri)
      Obtains the NamespaceHandler that is capable of processing the namespace defined with the specified URI.
      Parameters:
      uri - the Xml Namespace URI of the NamespaceHandler to locate
      Returns:
      null if a NamespaceHandler could not be located for the specified URI

    • getNamespaceHandler

      NamespaceHandler getNamespaceHandler(String sPrefix)
      Obtains the NamespaceHandler which is capable of processing the namespace with the specified prefix.
      Parameters:
      sPrefix - the prefix of the xml namespace
      Returns:
      null if a NamespaceHandler could not be located for the specified prefix

    • getNamespaceURI

      URI getNamespaceURI(String sPrefix)
      Obtains the URI that is associated with the specified prefix.
      Parameters:
      sPrefix - the XML namespace prefix of the URI to locate
      Returns:
      null if a URI could not be located for the specified URI

    • getNamespaceHandlers

      Iterable<NamespaceHandler> getNamespaceHandlers()
      Obtains the NamespaceHandlers that are currently in scope for this ProcessingContext.
      Returns:
      An Iterable over the NamespaceHandlers in scope.

    • processDocumentAt

      Object processDocumentAt(URI uri) throws ConfigurationException
      Request that the document specified by the URI/filename (containing the root of an XmlDocument) be processed with appropriate NamespaceHandlers.

      Should the document root contain any unrecognized xml namespaces, an attempt will be made to load appropriate NamespaceHandlers that of which will be used to process said elements in the document.

      Parameters:
      uri - the URI of the XmlDocument to process
      Returns:
      the result of the processing the root element of the document
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • processDocumentAt

      Object processDocumentAt(String sLocation) throws ConfigurationException
      Request that the document specified by the URI/filename (containing the root of an XmlDocument) be processed with appropriate NamespaceHandlers.

      Should the document root contain any unrecognized xml namespaces, an attempt will be made to load appropriate NamespaceHandlers that of which will be used to process said elements in the document.

      Parameters:
      sLocation - the URI/filename of the XmlDocument to process
      Returns:
      the result of the processing the root element of the document
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • processDocument

      Object processDocument(XmlElement xmlElement) throws ConfigurationException
      Request that the specified XmlElement (representing the root of an XmlDocument) be processed with appropriate NamespaceHandlers.

      Should the document root contain any unrecognized xml namespaces, an attempt will be made to load appropriate NamespaceHandlers that of which will be used to process said elements in the document.

      Parameters:
      xmlElement - the root XmlElement of the XmlDocument to process
      Returns:
      the result of the processing the root element of the document represented by the XmlElement
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • processDocument

      Object processDocument(String sXml) throws ConfigurationException
      Request that the specified xml string (representing an xml document) be processed with appropriate NamespaceHandlers.

      Should the document root contain any unrecognized xml namespaces, an attempt will be made to load appropriate NamespaceHandlers that of which will be used to process said elements in the document.

      Parameters:
      sXml - a string containing an xml document to process
      Returns:
      the result of processing the root element of the document
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • processElement

      Object processElement(XmlElement xmlElement) throws ConfigurationException
      Request the specified XmlElement to be processed with an appropriate NamespaceHandler known by the ProcessingContext or outer ProcessingContexts.

      Note: Should the element contain any unrecognized xml namespaces, an attempt will be made to load appropriate NamespaceHandlers that of which will be used to process said elements.

      Parameters:
      xmlElement - the XmlElement to process
      Returns:
      the result of processing the XmlElement with an appropriate ElementProcessor
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • processElement

      Object processElement(String sXml) throws ConfigurationException
      Request the specified xml string be processed with an appropriate NamespaceHandler known by the ProcessingContext.

      Note: Should the element contain any unrecognized xml namespaces, an attempt will be made to load appropriate NamespaceHandlers that of which will be used to process said elements.

      Parameters:
      sXml - the xml to process
      Returns:
      the result of processing the root element of the specified xml
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • processElementsOf

      Map<String,?> processElementsOf(XmlElement xmlElement) throws ConfigurationException
      Request that all of the child elements contained with in the specified XmlElement be processed using appropriate NamespaceHandlers known by the ProcessingContext.

      This is a convenience method to aid in the processing of all children of an XmlElement. The keys of the returned Map represent the id attributes each child XmlElement. If an XmlElement does not have a specified id attribute, a UUID is generated in it's place.

      Parameters:
      xmlElement - the parent XmlElement of the children to process
      Returns:
      a Map from identifiable child XmlElements (with id="..." attributes) and their corresponding processed values
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • processForeignElementsOf

      Map<String,?> processForeignElementsOf(XmlElement xmlElement) throws ConfigurationException
      Request that all of the child elements contained within the specified XmlElement that do not belong to the namespace of the said XmlElement are processed using appropriate processes.

      This is a convenience method to aid in the processing of all children of an XmlElement. The keys of the returned Map represent the id attributes each child XmlElement. If an XmlElement does not have a specified id attribute, a UUID is generated in it's place.

      Parameters:
      xmlElement - the parent XmlElement of the children to process
      Returns:
      a Map from identifiable child XmlElements (with id="..." attributes) and their corresponding processed values
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • processOnlyElementOf

      <T> T processOnlyElementOf(XmlElement xmlElement) throws ConfigurationException
      Request that the only child element contained within the XmlElement is processed using an appropriate NamespaceHandler known by the ProcessingContext.
      Type Parameters:
      T - the type
      Parameters:
      xmlElement - the XmlElement in which the child is defined
      Returns:
      the result of processing the child element
      Throws:
      ConfigurationException - when a configuration problem was encountered, especially if there is zero or more than one child

    • processRemainingElementOf

      <T> T processRemainingElementOf(XmlElement xmlElement) throws ConfigurationException
      Request that the last remaining unprocessed child element contained within the specified XmlElement is processed using an appropriate ElementProcessor.

      This is a convenience method to aid in the processing of an unprocessed child XmlElement of an element.

      Type Parameters:
      T - the type
      Parameters:
      xmlElement - the parent XmlElement of the unprocessed child to process
      Returns:
      the result of processing the child element
      Throws:
      ConfigurationException - if there are zero or more than one unprocessed child in the element, or if some other ConfigurationException occurred

    • processRemainingElementsOf

      Map<String,?> processRemainingElementsOf(XmlElement xmlElement) throws ConfigurationException
      Request that the last remaining unprocessed children contained within the specified XmlElement are processed using appropriate ElementProcessors.

      This is a convenience method to aid in the processing of an unprocessed child XmlElements of an element. The keys of the returned Map represent the id attributes each child XmlElement. If an XmlElement does not have a specified id attribute, a UUID is generated in it's place.

      Parameters:
      xmlElement - the parent XmlElement of the unprocessed children to process
      Returns:
      a Map from identifiable child XmlElements (with id="..." attributes) and their corresponding processed values
      Throws:
      ConfigurationException - when a configuration problem was encountered

    • inject

      <B> B inject(B bean, XmlElement xmlElement) throws ConfigurationException
      Given the information available in the ProcessingContext, including the cookies, the ResourceRegistry the XmlElement, its XmlAttributes and/or children, inject appropriately named and typed values into the specified bean (using setter injection).

      The order in which values are located for injection is as follows; attributed defined by the element, child elements defined by the element, alternative paths to values defined in the ProcessingContext, cookies defined by the ProcessingContext and finally the ResourceRegistry associated with the ProcessingContext.

      Type Parameters:
      B - the bean type
      Parameters:
      bean - the bean to be injected
      xmlElement - the XmlElement from which values will be derived for injection into the bean
      Returns:
      the provided bean but with properties set based on the available values in the ProcessingContext
      Throws:
      ConfigurationException - if a configuration is not valid

    • isPropertyDefined

      boolean isPropertyDefined(String sPath, XmlElement xmlElement) throws ConfigurationException
      Determines if the specified property is defined at the path relative to the specified XmlElement.
      Parameters:
      sPath - the path to the property
      xmlElement - the XmlElement in which the property should be searched
      Returns:
      true if the property is defined, false otherwise
      Throws:
      ConfigurationException - if a configuration is not valid

    • getMandatoryProperty

      <T> T getMandatoryProperty(String sPath, Type typeProperty, XmlElement xmlElement) throws ConfigurationException
      Obtains the strongly typed value for the property defined at the path relative to the specified XmlElement. If the property is not defined or is of the incorrect type, a ConfigurationException is thrown.
      Type Parameters:
      T - the type of the property
      Parameters:
      sPath - the path to the property
      typeProperty - the type of the property
      xmlElement - the XmlElement containing the properties for the object
      Returns:
      the property value
      Throws:
      ConfigurationException - if a configuration is not valid, the property can't be located or is of the wrong type

    • getOptionalProperty

      <T> T getOptionalProperty(String sPath, Type typeProperty, T defaultValue, XmlElement xmlElement) throws ConfigurationException
      Obtains the strongly typed value for the property defined at the path relative to the specified XmlElement. If the property is not defined, the defaultValue is returned.
      Type Parameters:
      T - the type of the property
      Parameters:
      sPath - the path to the property
      typeProperty - the type of the property
      defaultValue - the value to return if the property is not found
      xmlElement - the XmlElement containing the properties for the object
      Returns:
      the property value
      Throws:
      ConfigurationException - if a configuration is not valid