Package org.apache.tools.ant.types

## Class RegularExpression

- java.lang.Object
- - org.apache.tools.ant.ProjectComponent
  - - org.apache.tools.ant.types.DataType
    - - org.apache.tools.ant.types.RegularExpression

All Implemented Interfaces:
  `java.lang.Cloneable`

    public class RegularExpression
    extends DataType

A regular expression datatype. Keeps an instance of the compiled expression for speed purposes. This compiled expression is lazily evaluated (it is compiled the first time it is needed). The syntax is the dependent on which regular expression type you are using. The system property "ant.regexp.regexpimpl" will be the classname of the implementation that will be used.

     Available implementations:

       org.apache.tools.ant.util.regexp.Jdk14RegexpRegexp (default)
            Based on the JDK's built-in regular expression package

       org.apache.tools.ant.util.regexp.JakartaOroRegexp
            Based on the jakarta-oro package

       org.apache.tools.ant.util.regexp.JakartaRegexpRegexp
            Based on the jakarta-regexp package

       <regexp [ [id="id"] pattern="expression" | refid="id" ]
       />

See Also:
  `Perl5Compiler`, `RE`, `Pattern`, `Regexp`

### Field Summary

Fields
`static java.lang.String` `DATA_TYPE_NAME` Name of this data type

### Fields inherited from class org.apache.tools.ant.types.DataType

`checked, ref`

### Fields inherited from class org.apache.tools.ant.ProjectComponent

`description, location, project`

### Constructor Summary

Constructors
`RegularExpression()`

### Method Summary

All Methods Instance Methods Concrete Methods
`java.lang.String` `getPattern​(Project p)` Gets the pattern string for this RegularExpression in the given project.
`RegularExpression` `getRef​(Project p)` Get the RegularExpression this reference refers to in the given project.
`Regexp` `getRegexp​(Project p)` provides a reference to the Regexp contained in this
`void` `setPattern​(java.lang.String pattern)` sets the regular expression pattern

### Methods inherited from class org.apache.tools.ant.types.DataType

`checkAttributesAllowed, checkChildrenAllowed, circularReference, clone, dieOnCircularReference, dieOnCircularReference, dieOnCircularReference, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getDataTypeName, getRefid, invokeCircularReferenceCheck, isChecked, isReference, noChildrenAllowed, pushAndInvokeCircularReferenceCheck, setChecked, setRefid, tooManyAttributes, toString`

### Methods inherited from class org.apache.tools.ant.ProjectComponent

`getDescription, getLocation, getProject, log, log, setDescription, setLocation, setProject`

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

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

### Field Detail

#### DATA_TYPE_NAME

    public static final java.lang.String DATA_TYPE_NAME

Name of this data type

See Also:
  Constant Field Values

### Constructor Detail

#### RegularExpression

    public RegularExpression()

### Method Detail

#### setPattern

    public void setPattern​(java.lang.String pattern)

sets the regular expression pattern

Parameters:
  `pattern` - regular expression pattern

#### getPattern

    public java.lang.String getPattern​(Project p)

Gets the pattern string for this RegularExpression in the given project.

Parameters:
  `p` - project
Returns:
  pattern

#### getRegexp

    public Regexp getRegexp​(Project p)

provides a reference to the Regexp contained in this

Parameters:
  `p` - project
Returns:
  Regexp instance associated with this RegularExpression instance

#### getRef

    public RegularExpression getRef​(Project p)

Get the RegularExpression this reference refers to in the given project. Check for circular references too

Parameters:
  `p` - project
Returns:
  resolved RegularExpression instance