Xerces2 Implementation: Class XMLErrorReporter

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## org.apache.xerces.impl
Class XMLErrorReporter

    java.lang.Object
      |
      +--org.apache.xerces.impl.XMLErrorReporter

All Implemented Interfaces:
  org.apache.xerces.xni.parser.XMLComponent

public class XMLErrorReporter
extends java.lang.Object
implements org.apache.xerces.xni.parser.XMLComponent

This class is a common element of all parser configurations and is used to report errors that occur. This component can be queried by parser components from the component manager using the following property ID:

       http://apache.org/xml/properties/internal/error-reporter

Errors are separated into domains that categorize a class of errors. In a parser configuration, the parser would register a `MessageFormatter` for each domain that is capable of localizing error messages and formatting them based on information about the error. Any parser component can invent new error domains and register additional message formatters to localize messages in those domains.

This component requires the following features and properties from the component manager that uses it:

- http://apache.org/xml/properties/internal/error-handler

This component can use the following features and properties but they are not required:

- http://apache.org/xml/features/continue-after-fatal-error

# INTERNAL:

  Usage of this class is not supported. It may be altered or removed at any time.

Version:
  $Id: XMLErrorReporter.java 575002 2007-09-12 16:02:04Z mrglavas $
Author:
  Eric Ye, IBM, Andy Clark, IBM
See Also:
  `MessageFormatter`

Field Summary
`protected static java.lang.String` | `CONTINUE_AFTER_FATAL_ERROR` Feature identifier: continue after fatal error.
`protected static java.lang.String` | `ERROR_HANDLER` Property identifier: error handler.
`protected boolean` | `fContinueAfterFatalError` Continue after fatal error feature.
`protected org.apache.xerces.xni.parser.XMLErrorHandler` | `fDefaultErrorHandler` Default error handler.
`protected org.apache.xerces.xni.parser.XMLErrorHandler` | `fErrorHandler` Error handler.
`protected java.util.Locale` | `fLocale` The locale to be used to format error messages.
`protected org.apache.xerces.xni.XMLLocator` | `fLocator` Document locator.
`protected java.util.Hashtable` | `fMessageFormatters` Mapping of Message formatters for domains.
`static short` | `SEVERITY_ERROR` Severity: error.
`static short` | `SEVERITY_FATAL_ERROR` Severity: fatal error.
`static short` | `SEVERITY_WARNING` Severity: warning.

Constructor Summary
`XMLErrorReporter()` Constructs an error reporter with a locator.

Method Summary
`org.apache.xerces.xni.parser.XMLErrorHandler` | `getErrorHandler()` Get the internal XMLErrrorHandler.
`boolean` | `getFeature(java.lang.String featureId)`
`java.lang.Boolean` | `getFeatureDefault(java.lang.String featureId)` Returns the default state for a feature, or null if this component does not want to report a default value for this feature.
`java.util.Locale` | `getLocale()` Gets the current locale.
`MessageFormatter` | `getMessageFormatter(java.lang.String domain)` Returns the message formatter associated with the specified domain, or null if no message formatter is registered for that domain.
`java.lang.Object` | `getPropertyDefault(java.lang.String propertyId)` Returns the default state for a property, or null if this component does not want to report a default value for this property.
`java.lang.String[]` | `getRecognizedFeatures()` Returns a list of feature identifiers that are recognized by this component.
`java.lang.String[]` | `getRecognizedProperties()` Returns a list of property identifiers that are recognized by this component.
`org.xml.sax.ErrorHandler` | `getSAXErrorHandler()` Gets the internal XMLErrorHandler as SAX ErrorHandler.
`void` | `putMessageFormatter(java.lang.String domain, MessageFormatter messageFormatter)` Registers a message formatter for the specified domain.
`MessageFormatter` | `removeMessageFormatter(java.lang.String domain)` Removes the message formatter for the specified domain and returns the removed message formatter.
`void` | `reportError(java.lang.String domain, java.lang.String key, java.lang.Object[] arguments, short severity)` Reports an error.
`void` | `reportError(java.lang.String domain, java.lang.String key, java.lang.Object[] arguments, short severity, java.lang.Exception exception)` Reports an error.
`void` | `reportError(org.apache.xerces.xni.XMLLocator location, java.lang.String domain, java.lang.String key, java.lang.Object[] arguments, short severity)` Reports an error at a specific location.
`void` | `reportError(org.apache.xerces.xni.XMLLocator location, java.lang.String domain, java.lang.String key, java.lang.Object[] arguments, short severity, java.lang.Exception exception)` Reports an error at a specific location.
`void` | `reset(org.apache.xerces.xni.parser.XMLComponentManager componentManager)` Resets the component.
`void` | `setDocumentLocator(org.apache.xerces.xni.XMLLocator locator)` Sets the document locator.
`void` | `setFeature(java.lang.String featureId, boolean state)` Sets the state of a feature.
`void` | `setLocale(java.util.Locale locale)` Sets the current locale.
`void` | `setProperty(java.lang.String propertyId, java.lang.Object value)` Sets the value of a property.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### SEVERITY_WARNING

    public static final short SEVERITY_WARNING

  Severity: warning. Warnings represent informational messages only that should not be considered serious enough to stop parsing or indicate an error in the document's validity.

### SEVERITY_ERROR

    public static final short SEVERITY_ERROR

  Severity: error. Common causes of errors are document structure and/or content that that does not conform to the grammar rules specified for the document. These are typically validation errors.

### SEVERITY_FATAL_ERROR

    public static final short SEVERITY_FATAL_ERROR

  Severity: fatal error. Fatal errors are errors in the syntax of the XML document or invalid byte sequences for a given encoding. The XML 1.0 Specification mandates that errors of this type are not recoverable.

  Note: The parser does have a "continue after fatal error" feature but it should be used with extreme caution and care.

### CONTINUE_AFTER_FATAL_ERROR

    protected static final java.lang.String CONTINUE_AFTER_FATAL_ERROR

  Feature identifier: continue after fatal error.

### ERROR_HANDLER

    protected static final java.lang.String ERROR_HANDLER

  Property identifier: error handler.

### fLocale

    protected java.util.Locale fLocale

  The locale to be used to format error messages.

### fMessageFormatters

    protected java.util.Hashtable fMessageFormatters

  Mapping of Message formatters for domains.

### fErrorHandler

    protected org.apache.xerces.xni.parser.XMLErrorHandler fErrorHandler

  Error handler.

### fLocator

    protected org.apache.xerces.xni.XMLLocator fLocator

  Document locator.

### fContinueAfterFatalError

    protected boolean fContinueAfterFatalError

  Continue after fatal error feature.

### fDefaultErrorHandler

    protected org.apache.xerces.xni.parser.XMLErrorHandler fDefaultErrorHandler

  Default error handler. This error handler is only used in the absence of a registered error handler so that errors are not "swallowed" silently. This is one of the most common "problems" reported by users of the parser.

Constructor Detail

### XMLErrorReporter

    public XMLErrorReporter()

  Constructs an error reporter with a locator.

Method Detail

### setLocale

    public void setLocale(java.util.Locale locale)

  Sets the current locale.
  Parameters:
    `locale` - The new locale.

### getLocale

    public java.util.Locale getLocale()

  Gets the current locale.
  Returns:
    the current Locale

### setDocumentLocator

    public void setDocumentLocator(org.apache.xerces.xni.XMLLocator locator)

  Sets the document locator.
  Parameters:
    `locator` - The locator.

### putMessageFormatter

    public void putMessageFormatter(java.lang.String domain,
                                    MessageFormatter messageFormatter)

  Registers a message formatter for the specified domain.

  Note: Registering a message formatter for a domain when there is already a formatter registered will cause the previous formatter to be lost. This method replaces any previously registered message formatter for the specified domain.

  Parameters:
    `domain` -
    `messageFormatter` -

### getMessageFormatter

    public MessageFormatter getMessageFormatter(java.lang.String domain)

  Returns the message formatter associated with the specified domain, or null if no message formatter is registered for that domain.
  Parameters:
    `domain` - The domain of the message formatter.

### removeMessageFormatter

    public MessageFormatter removeMessageFormatter(java.lang.String domain)

  Removes the message formatter for the specified domain and returns the removed message formatter.
  Parameters:
    `domain` - The domain of the message formatter.

### reportError

    public void reportError(java.lang.String domain,
                            java.lang.String key,
                            java.lang.Object[] arguments,
                            short severity)
                     throws org.apache.xerces.xni.XNIException

  Reports an error. The error message passed to the error handler is formatted for the locale by the message formatter installed for the specified error domain.
  Parameters:
    `domain` - The error domain.
    `key` - The key of the error message.
    `arguments` - The replacement arguments for the error message, if needed.
    `severity` - The severity of the error.
  See Also:
    `SEVERITY_WARNING`, `SEVERITY_ERROR`, `SEVERITY_FATAL_ERROR`

### reportError

    public void reportError(java.lang.String domain,
                            java.lang.String key,
                            java.lang.Object[] arguments,
                            short severity,
                            java.lang.Exception exception)
                     throws org.apache.xerces.xni.XNIException

  Reports an error. The error message passed to the error handler is formatted for the locale by the message formatter installed for the specified error domain.
  Parameters:
    `domain` - The error domain.
    `key` - The key of the error message.
    `arguments` - The replacement arguments for the error message, if needed.
    `severity` - The severity of the error.
    `exception` - The exception to wrap.
  See Also:
    `SEVERITY_WARNING`, `SEVERITY_ERROR`, `SEVERITY_FATAL_ERROR`

### reportError

    public void reportError(org.apache.xerces.xni.XMLLocator location,
                            java.lang.String domain,
                            java.lang.String key,
                            java.lang.Object[] arguments,
                            short severity)
                     throws org.apache.xerces.xni.XNIException

  Reports an error at a specific location.
  Parameters:
    `location` - The error location.
    `domain` - The error domain.
    `key` - The key of the error message.
    `arguments` - The replacement arguments for the error message, if needed.
    `severity` - The severity of the error.
  See Also:
    `SEVERITY_WARNING`, `SEVERITY_ERROR`, `SEVERITY_FATAL_ERROR`

### reportError

    public void reportError(org.apache.xerces.xni.XMLLocator location,
                            java.lang.String domain,
                            java.lang.String key,
                            java.lang.Object[] arguments,
                            short severity,
                            java.lang.Exception exception)
                     throws org.apache.xerces.xni.XNIException

  Reports an error at a specific location.
  Parameters:
    `location` - The error location.
    `domain` - The error domain.
    `key` - The key of the error message.
    `arguments` - The replacement arguments for the error message, if needed.
    `severity` - The severity of the error.
    `exception` - The exception to wrap.
  See Also:
    `SEVERITY_WARNING`, `SEVERITY_ERROR`, `SEVERITY_FATAL_ERROR`

### reset

    public void reset(org.apache.xerces.xni.parser.XMLComponentManager componentManager)
               throws org.apache.xerces.xni.XNIException

  Resets the component. The component can query the component manager about any features and properties that affect the operation of the component.
  Specified by:
    `reset` in interface `org.apache.xerces.xni.parser.XMLComponent`
  Parameters:
    `componentManager` - The component manager.
  Throws:
    `SAXException` - Thrown by component on initialization error. For example, if a feature or property is required for the operation of the component, the component manager may throw a SAXNotRecognizedException or a SAXNotSupportedException.

### getRecognizedFeatures

    public java.lang.String[] getRecognizedFeatures()

  Returns a list of feature identifiers that are recognized by this component. This method may return null if no features are recognized by this component.
  Specified by:
    `getRecognizedFeatures` in interface `org.apache.xerces.xni.parser.XMLComponent`

### setFeature

    public void setFeature(java.lang.String featureId,
                           boolean state)
                    throws org.apache.xerces.xni.parser.XMLConfigurationException

  Sets the state of a feature. This method is called by the component manager any time after reset when a feature changes state.

  Note: Components should silently ignore features that do not affect the operation of the component.

  Specified by:
    `setFeature` in interface `org.apache.xerces.xni.parser.XMLComponent`
  Parameters:
    `featureId` - The feature identifier.
    `state` - The state of the feature.
  Throws:
    `SAXNotRecognizedException` - The component should not throw this exception.
    `SAXNotSupportedException` - The component should not throw this exception.

### getFeature

    public boolean getFeature(java.lang.String featureId)
                       throws org.apache.xerces.xni.parser.XMLConfigurationException

### getRecognizedProperties

    public java.lang.String[] getRecognizedProperties()

  Returns a list of property identifiers that are recognized by this component. This method may return null if no properties are recognized by this component.
  Specified by:
    `getRecognizedProperties` in interface `org.apache.xerces.xni.parser.XMLComponent`

### setProperty

    public void setProperty(java.lang.String propertyId,
                            java.lang.Object value)
                     throws org.apache.xerces.xni.parser.XMLConfigurationException

  Sets the value of a property. This method is called by the component manager any time after reset when a property changes value.

  Note: Components should silently ignore properties that do not affect the operation of the component.

  Specified by:
    `setProperty` in interface `org.apache.xerces.xni.parser.XMLComponent`
  Parameters:
    `propertyId` - The property identifier.
    `value` - The value of the property.
  Throws:
    `SAXNotRecognizedException` - The component should not throw this exception.
    `SAXNotSupportedException` - The component should not throw this exception.

### getFeatureDefault

    public java.lang.Boolean getFeatureDefault(java.lang.String featureId)

  Returns the default state for a feature, or null if this component does not want to report a default value for this feature.
  Specified by:
    `getFeatureDefault` in interface `org.apache.xerces.xni.parser.XMLComponent`
  Parameters:
    `featureId` - The feature identifier.
  Since:
    Xerces 2.2.0

### getPropertyDefault

    public java.lang.Object getPropertyDefault(java.lang.String propertyId)

  Returns the default state for a property, or null if this component does not want to report a default value for this property.
  Specified by:
    `getPropertyDefault` in interface `org.apache.xerces.xni.parser.XMLComponent`
  Parameters:
    `propertyId` - The property identifier.
  Since:
    Xerces 2.2.0

### getErrorHandler

    public org.apache.xerces.xni.parser.XMLErrorHandler getErrorHandler()

  Get the internal XMLErrrorHandler.

### getSAXErrorHandler

    public org.xml.sax.ErrorHandler getSAXErrorHandler()

  Gets the internal XMLErrorHandler as SAX ErrorHandler.

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