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## org.apache.tomcat.util.digester
Class Rule

    java.lang.Object
      org.apache.tomcat.util.digester.Rule

Direct Known Subclasses:
  CallMethodRule, CallParamRule, ConnectorCreateRule, CopyParentClassLoaderRule, FactoryCreateRule, LifecycleListenerRule, NodeCreateRule, ObjectCreateRule, ObjectParamRule, PathCallParamRule, SetAllPropertiesRule, SetContextPropertiesRule, SetNextNamingRule, SetNextRule, SetPropertiesRule, SetPropertyRule, SetRootRule, SetTopRule, StoreFactoryRule

public abstract class Rule
extends java.lang.Object

Concrete implementations of this class implement actions to be taken when a corresponding nested pattern of XML elements has been matched.

Field Summary
`protected Digester` | `digester` The Digester with which this Rule is associated.
`protected java.lang.String` | `namespaceURI` The namespace URI for which this Rule is relevant, if any.

Constructor Summary
`Rule()` Base constructor.
`Rule(Digester digester)` Deprecated. The digester instance is now set in the `Digester.addRule(java.lang.String, org.apache.tomcat.util.digester.Rule)` method. Use `Rule()` instead.

Method Summary
`void` | `begin(org.xml.sax.Attributes attributes)` Deprecated. Use the `begin` method with `namespace` and `name` parameters instead.
`void` | `begin(java.lang.String namespace, java.lang.String name, org.xml.sax.Attributes attributes)` This method is called when the beginning of a matching XML element is encountered.
`void` | `body(java.lang.String text)` Deprecated. Use the `body` method with `namespace` and `name` parameters instead.
`void` | `body(java.lang.String namespace, java.lang.String name, java.lang.String text)` This method is called when the body of a matching XML element is encountered.
`void` | `end()` Deprecated. Use the `end` method with `namespace` and `name` parameters instead.
`void` | `end(java.lang.String namespace, java.lang.String name)` This method is called when the end of a matching XML element is encountered.
`void` | `finish()` This method is called after all parsing methods have been called, to allow Rules to remove temporary data.
`Digester` | `getDigester()` Return the Digester with which this Rule is associated.
`java.lang.String` | `getNamespaceURI()` Return the namespace URI for which this Rule is relevant, if any.
`void` | `setDigester(Digester digester)` Set the `Digester` with which this `Rule` is associated.
`void` | `setNamespaceURI(java.lang.String namespaceURI)` Set the namespace URI for which this Rule is relevant, if any.

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

Field Detail

### digester

    protected Digester digester

  The Digester with which this Rule is associated.

### namespaceURI

    protected java.lang.String namespaceURI

  The namespace URI for which this Rule is relevant, if any.

Constructor Detail

### Rule

    public Rule(Digester digester)

  Deprecated. The digester instance is now set in the `Digester.addRule(java.lang.String, org.apache.tomcat.util.digester.Rule)` method. Use `Rule()` instead.

  Constructor sets the associated Digester.

Parameters:
  `digester` - The digester with which this rule is associated

### Rule

    public Rule()

  Base constructor. Now the digester will be set when the rule is added.

Method Detail

### getDigester

    public Digester getDigester()

  Return the Digester with which this Rule is associated.

### setDigester

    public void setDigester(Digester digester)

  Set the `Digester` with which this `Rule` is associated.

### getNamespaceURI

    public java.lang.String getNamespaceURI()

  Return the namespace URI for which this Rule is relevant, if any.

### setNamespaceURI

    public void setNamespaceURI(java.lang.String namespaceURI)

  Set the namespace URI for which this Rule is relevant, if any.

  Parameters:
    `namespaceURI` - Namespace URI for which this Rule is relevant, or `null` to match independent of namespace.

### begin

    public void begin(org.xml.sax.Attributes attributes)
               throws java.lang.Exception

  Deprecated. Use the `begin` method with `namespace` and `name` parameters instead.

  This method is called when the beginning of a matching XML element is encountered.

  Parameters:
    `attributes` - The attribute list of this element
  Throws:
    `java.lang.Exception`

### begin

    public void begin(java.lang.String namespace,
                      java.lang.String name,
                      org.xml.sax.Attributes attributes)
               throws java.lang.Exception

  This method is called when the beginning of a matching XML element is encountered. The default implementation delegates to the deprecated method `begin` without the `namespace` and `name` parameters, to retain backwards compatibility.

  Parameters:
    `namespace` - the namespace URI of the matching element, or an empty string if the parser is not namespace aware or the element has no namespace
    `name` - the local name if the parser is namespace aware, or just the element name otherwise
    `attributes` - The attribute list of this element
  Throws:
    `java.lang.Exception`
  Since:
    Digester 1.4

### body

    public void body(java.lang.String text)
              throws java.lang.Exception

  Deprecated. Use the `body` method with `namespace` and `name` parameters instead.

  This method is called when the body of a matching XML element is encountered. If the element has no body, this method is not called at all.

  Parameters:
    `text` - The text of the body of this element
  Throws:
    `java.lang.Exception`

### body

    public void body(java.lang.String namespace,
                     java.lang.String name,
                     java.lang.String text)
              throws java.lang.Exception

  This method is called when the body of a matching XML element is encountered. If the element has no body, this method is not called at all. The default implementation delegates to the deprecated method `body` without the `namespace` and `name` parameters, to retain backwards compatibility.

  Parameters:
    `namespace` - the namespace URI of the matching element, or an empty string if the parser is not namespace aware or the element has no namespace
    `name` - the local name if the parser is namespace aware, or just the element name otherwise
    `text` - The text of the body of this element
  Throws:
    `java.lang.Exception`
  Since:
    Digester 1.4

### end

    public void end()
             throws java.lang.Exception

  Deprecated. Use the `end` method with `namespace` and `name` parameters instead.

  This method is called when the end of a matching XML element is encountered.

  Throws:
    `java.lang.Exception`

### end

    public void end(java.lang.String namespace,
                    java.lang.String name)
             throws java.lang.Exception

  This method is called when the end of a matching XML element is encountered. The default implementation delegates to the deprecated method `end` without the `namespace` and `name` parameters, to retain backwards compatibility.

  Parameters:
    `namespace` - the namespace URI of the matching element, or an empty string if the parser is not namespace aware or the element has no namespace
    `name` - the local name if the parser is namespace aware, or just the element name otherwise
  Throws:
    `java.lang.Exception`
  Since:
    Digester 1.4

### finish

    public void finish()
                throws java.lang.Exception

  This method is called after all parsing methods have been called, to allow Rules to remove temporary data.

  Throws:
    `java.lang.Exception`

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