org.apache.tomcat.util.digester

Class 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
protected StringmethodName
The method name to call on the parent object.
protected StringparamType
The Java class name of the parameter type expected by the method.
protected booleanuseExactMatch
Should we use exact matching.
Constructor Summary
SetNextRule(Digester digester, String methodName)
Construct a "set next" rule with the specified method name.
SetNextRule(Digester digester, String methodName, String paramType)
Construct a "set next" rule with the specified method name.
SetNextRule(String methodName)
Construct a "set next" rule with the specified method name.
SetNextRule(String methodName, String paramType)
Construct a "set next" rule with the specified method name.
Method Summary
voidend()
Process the end of this element.
booleanisExactMatch()

Is exact matching being used.

This rule uses org.apache.commons.beanutils.MethodUtils to introspect the relevent objects so that the right method can be called.

voidsetExactMatch(boolean useExactMatch)

Set whether exact matching is enabled.

See isExactMatch.

StringtoString()
Render a printable version of this Rule.

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(Digester digester, String methodName)

Deprecated: The digester instance is now set in the Digester method. Use SetNextRule instead.

Construct a "set next" rule with the specified method name. The method's argument type is assumed to be the class of the child object.

Parameters: digester The associated Digester methodName Method name of the parent method to call

SetNextRule

public SetNextRule(Digester digester, String methodName, String paramType)

Deprecated: The digester instance is now set in the Digester method. Use SetNextRule instead.

Construct a "set next" rule with the specified method name.

Parameters: digester The associated Digester 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 corresonding Java wrapper class instead, such as java.lang.Boolean for a boolean parameter)

SetNextRule

public SetNextRule(String methodName)
Construct a "set next" rule with the specified method name. The method's argument type is assumed to be the class of the child object.

Parameters: methodName Method name of the parent method to call

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 corresonding Java wrapper class instead, such as java.lang.Boolean for a boolean parameter)

Method Detail

end

public void end()
Process the end of this element.

isExactMatch

public boolean isExactMatch()

Is exact matching being used.

This rule uses org.apache.commons.beanutils.MethodUtils to introspect the relevent 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

toString

public String toString()
Render a printable version of this Rule.
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