SetNextRule (Apache Tomcat 8.5.53 API Documentation)

org.apache.tomcat.util.digester

## Class SetNextRule

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

-     public class SetNextRule
      extends Rule

  Rule implementation that calls a method on the (top-1) (parent) object, passing the top object (child) as an argument. It is commonly used to establish parent-child relationships.

  This rule now supports more flexible method matching by default. It is possible that this may break (some) code written against release 1.1.1 or earlier. See `isExactMatch()` for more details.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected String` | `methodName` The method name to call on the parent object.
    `protected String` | `paramType` The Java class name of the parameter type expected by the method.
    `protected boolean` | `useExactMatch` Should we use exact matching.

    - ### Fields inherited from class org.apache.tomcat.util.digester.Rule

      `digester, namespaceURI`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `SetNextRule(String methodName, String paramType)` Construct a "set next" rule with the specified method name.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `end(String namespace, String name)` Process the end of this element.
    `boolean` | `isExactMatch()` Is exact matching being used.
    `void` | `setExactMatch(boolean useExactMatch)` Set whether exact matching is enabled.
    `String` | `toString()` Render a printable version of this Rule.

    - ### Methods inherited from class org.apache.tomcat.util.digester.Rule

      `begin, body, finish, getDigester, getNamespaceURI, setDigester, setNamespaceURI`

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### methodName

          protected String methodName

      The method name to call on the parent object.

    - #### paramType

          protected String paramType

      The Java class name of the parameter type expected by the method.

    - #### useExactMatch

          protected boolean useExactMatch

      Should we use exact matching. Default is no.

  - ### Constructor Detail

    - #### SetNextRule

          public SetNextRule(String methodName,
                     String paramType)

      Construct a "set next" rule with the specified method name.
      Parameters:
        `methodName` - Method name of the parent method to call
        `paramType` - Java class of the parent method's argument (if you wish to use a primitive type, specify the corresponding Java wrapper class instead, such as `java.lang.Boolean` for a `boolean` parameter)

  - ### Method Detail

    - #### isExactMatch

          public boolean isExactMatch()

      Is exact matching being used.

      This rule uses `org.apache.commons.beanutils.MethodUtils` to introspect the relevant objects so that the right method can be called. Originally, `MethodUtils.invokeExactMethod` was used. This matches methods very strictly and so may not find a matching method when one exists. This is still the behaviour when exact matching is enabled.

      When exact matching is disabled, `MethodUtils.invokeMethod` is used. This method finds more methods but is less precise when there are several methods with correct signatures. So, if you want to choose an exact signature you might need to enable this property.

      The default setting is to disable exact matches.

      Returns:
        true iff exact matching is enabled
      Since:
        Digester Release 1.1.1

    - #### setExactMatch

          public void setExactMatch(boolean useExactMatch)

      Set whether exact matching is enabled.

      See `isExactMatch()`.

      Parameters:
        `useExactMatch` - should this rule use exact method matching
      Since:
        Digester Release 1.1.1

    - #### end

          public void end(String namespace,
                 String name)
                   throws Exception

      Process the end of this element.
      Overrides:
        `end` in class `Rule`
      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:
        `Exception` - if an error occurs while processing the event

    - #### toString

          public String toString()

      Render a printable version of this Rule.
      Overrides:
        `toString` in class `Object`

Copyright © 2000-2020 Apache Software Foundation. All Rights Reserved.