RulesBase (Apache Tomcat 8.0.15 API Documentation)

java.lang.Object
- org.apache.tomcat.util.digester.RulesBase

All Implemented Interfaces:

Rules
```
public class RulesBase
extends Object
implements Rules
```
Default implementation of the Rules interface that supports the standard rule matching behavior. This class can also be used as a base class for specialized Rules implementations.

The matching policies implemented by this class support two different types of pattern matching rules:
- Exact Match - A pattern "a/b/c" exactly matches a <c> element, nested inside a <b> element, which is nested inside an <a> element.
- Tail Match - A pattern "*/a/b" matches a <b> element, nested inside an <a> element, no matter how deeply the pair is nested.

Field Summary

Fields
Modifier and Type	Field and Description
`protected HashMap<String,List<Rule>>`	`cache` The set of registered Rule instances, keyed by the matching pattern.
`protected Digester`	`digester` The Digester instance with which this Rules instance is associated.
`protected String`	`namespaceURI` The namespace URI for which subsequently added `Rule` objects are relevant, or `null` for matching independent of namespaces.
`protected ArrayList<Rule>`	`rules` The set of registered Rule instances, in the order that they were originally registered.

Constructor Summary

Constructors
Constructor and Description

RulesBase()

Constructors
Constructor and Description
`RulesBase()`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`add(String pattern, Rule rule)` Register a new Rule instance matching the specified pattern.
`void`	`clear()` Clear all existing Rule instance registrations.
`Digester`	`getDigester()` Return the Digester instance with which this Rules instance is associated.
`String`	`getNamespaceURI()` Return the namespace URI that will be applied to all subsequently added `Rule` objects.
`protected List<Rule>`	`lookup(String namespaceURI, String pattern)` Return a List of Rule instances for the specified pattern that also match the specified namespace URI (if any).
`List<Rule>`	`match(String namespaceURI, String pattern)` Return a List of all registered Rule instances that match the specified nesting pattern, or a zero-length List if there are no matches.
`List<Rule>`	`rules()` Return a List of all registered Rule instances, or a zero-length List if there are no registered Rule instances.
`void`	`setDigester(Digester digester)` Set the Digester instance with which this Rules instance is associated.
`void`	`setNamespaceURI(String namespaceURI)` Set the namespace URI that will be applied to all subsequently added `Rule` objects.

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

- Field Detail
  - cache
```
protected HashMap<String,List<Rule>> cache
```
    The set of registered Rule instances, keyed by the matching pattern. Each value is a List containing the Rules for that pattern, in the order that they were originally registered.
  - digester
```
protected Digester digester
```
    The Digester instance with which this Rules instance is associated.
  - namespaceURI
```
protected String namespaceURI
```
    The namespace URI for which subsequently added Rule objects are relevant, or null for matching independent of namespaces.
  - rules
```
protected ArrayList<Rule> rules
```
    The set of registered Rule instances, in the order that they were originally registered.
- Constructor Detail
  - RulesBase
```
public RulesBase()
```
- Method Detail
  - getDigester
```
public Digester getDigester()
```
    Return the Digester instance with which this Rules instance is associated.
    
    Specified by:
    
    getDigester in interface Rules
  - setDigester
```
public void setDigester(Digester digester)
```
    Set the Digester instance with which this Rules instance is associated.
    
    Specified by:
    
    setDigester in interface Rules
    
    Parameters:
    digester - The newly associated Digester instance
  - getNamespaceURI
```
public String getNamespaceURI()
```
    Return the namespace URI that will be applied to all subsequently added Rule objects.
    
    Specified by:
    
    getNamespaceURI in interface Rules
  - setNamespaceURI
```
public void setNamespaceURI(String namespaceURI)
```
    Set the namespace URI that will be applied to all subsequently added Rule objects.
    
    Specified by:
    
    setNamespaceURI in interface Rules
    
    Parameters:
    namespaceURI - Namespace URI that must match on all subsequently added rules, or null for matching regardless of the current namespace URI
  - add
```
public void add(String pattern,
       Rule rule)
```
    Register a new Rule instance matching the specified pattern.
    
    Specified by:
    
    add in interface Rules
    
    Parameters:
    pattern - Nesting pattern to be matched for this Rule
    rule - Rule instance to be registered
  - clear
```
public void clear()
```
    Clear all existing Rule instance registrations.
    
    Specified by:
    
    clear in interface Rules
  - match
```
public List<Rule> match(String namespaceURI,
               String pattern)
```
    Return a List of all registered Rule instances that match the specified nesting pattern, or a zero-length List if there are no matches. If more than one Rule instance matches, they must be returned in the order originally registered through the add() method.
    
    Specified by:
    
    match in interface Rules
    
    Parameters:
    namespaceURI - Namespace URI for which to select matching rules, or null to match regardless of namespace URI
    pattern - Nesting pattern to be matched
  - rules
```
public List<Rule> rules()
```
    Return a List of all registered Rule instances, or a zero-length List if there are no registered Rule instances. If more than one Rule instance has been registered, they must be returned in the order originally registered through the add() method.
    
    Specified by:
    
    rules in interface Rules
  - lookup
```
protected List<Rule> lookup(String namespaceURI,
                String pattern)
```
    Return a List of Rule instances for the specified pattern that also match the specified namespace URI (if any). If there are no such rules, return null.
    
    Parameters:
    namespaceURI - Namespace URI to match, or null to select matching rules regardless of namespace URI
    pattern - Pattern to be matched

Class RulesBase

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

cache

digester

namespaceURI

rules

Constructor Detail

RulesBase

Method Detail

getDigester

setDigester

getNamespaceURI

setNamespaceURI

add

clear

match

rules

lookup