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package com.sun.org.apache.xerces.internal.xni.parser;


The component interface defines methods that must be implemented
by components in a parser configuration. The component methods allow
the component manager to initialize the component state and notify
the component when feature and property values change.

Author:Andy Clark, IBM
See Also:
  • XMLComponentManager
/**
 * The component interface defines methods that must be implemented
 * by components in a parser configuration. The component methods allow
 * the component manager to initialize the component state and notify
 * the component when feature and property values change.
 *
 * @see XMLComponentManager
 *
 * @author Andy Clark, IBM
 *
 */
public interface XMLComponent {

    //
    // XMLComponent methods
    //

    
Resets the component. The component can query the component manager
about any features and properties that affect the operation of the
component.

Params:
  • componentManager – The component manager.
Throws:
  • XNIException – Thrown by component on initialization error.
/**
     * Resets the component. The component can query the component manager
     * about any features and properties that affect the operation of the
     * component.
     *
     * @param componentManager The component manager.
     *
     * @throws XNIException Thrown by component on initialization error.
     */
    public void reset(XMLComponentManager componentManager)
        throws XMLConfigurationException;

    
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.

/**
     * 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.
     */
    public String[] getRecognizedFeatures();

    
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.

Params:
  • featureId – The feature identifier.
  • state –     The state of the feature.
Throws:
  • XMLConfigurationException – Thrown for configuration error.
                                  In general, components should
                                  only throw this exception if
                                  it is really
                                  a critical error.
/**
     * Sets the state of a feature. This method is called by the component
     * manager any time after reset when a feature changes state.
     * <p>
     * <strong>Note:</strong> Components should silently ignore features
     * that do not affect the operation of the component.
     *
     * @param featureId The feature identifier.
     * @param state     The state of the feature.
     *
     * @throws XMLConfigurationException Thrown for configuration error.
     *                                   In general, components should
     *                                   only throw this exception if
     *                                   it is <strong>really</strong>
     *                                   a critical error.
     */
    public void setFeature(String featureId, boolean state)
        throws XMLConfigurationException;

    
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.

/**
     * 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.
     */
    public String[] getRecognizedProperties();

    
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.

Params:
  • propertyId – The property identifier.
  • value –      The value of the property.
Throws:
  • XMLConfigurationException – Thrown for configuration error.
                                  In general, components should
                                  only throw this exception if
                                  it is really
                                  a critical error.
/**
     * Sets the value of a property. This method is called by the component
     * manager any time after reset when a property changes value.
     * <p>
     * <strong>Note:</strong> Components should silently ignore properties
     * that do not affect the operation of the component.
     *
     * @param propertyId The property identifier.
     * @param value      The value of the property.
     *
     * @throws XMLConfigurationException Thrown for configuration error.
     *                                   In general, components should
     *                                   only throw this exception if
     *                                   it is <strong>really</strong>
     *                                   a critical error.
     */
    public void setProperty(String propertyId, Object value)
       throws XMLConfigurationException;

    
Returns the default state for a feature, or null if this
component does not want to report a default value for this
feature.

Params:
  • featureId – The feature identifier.
Since:Xerces 2.2.0
/**
     * Returns the default state for a feature, or null if this
     * component does not want to report a default value for this
     * feature.
     *
     * @param featureId The feature identifier.
     *
     * @since Xerces 2.2.0
     */
    public Boolean getFeatureDefault(String featureId);

    
Returns the default state for a property, or null if this
component does not want to report a default value for this
property.

Params:
  • propertyId – The property identifier.
Since:Xerces 2.2.0
/**
     * Returns the default state for a property, or null if this
     * component does not want to report a default value for this
     * property.
     *
     * @param propertyId The property identifier.
     *
     * @since Xerces 2.2.0
     */
    public Object getPropertyDefault(String propertyId);

} // interface XMLComponent