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
    Modifier and Type | Field and Description
    --- | ---
    `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
    Constructor and Description
    `RegularExpression()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `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, 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