## org.apache.tools.ant.types
Class Substitution

    java.lang.Object
      org.apache.tools.ant.ProjectComponent
          org.apache.tools.ant.types.DataType
              org.apache.tools.ant.types.Substitution

All Implemented Interfaces:
  java.lang.Cloneable

    public class Substitution

extends DataType

A regular expression substitution datatype. It is an expression that is meant to replace a regular expression.

       <substitution [ [id="id"] expression="expression" | refid="id" ]
       />

See Also:
  `Perl5Substitution`

Field Summary
`static java.lang.String` `DATA_TYPE_NAME` The 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
`Substitution()` Constructor for Substitution.

Method Summary
`java.lang.String` `getExpression(Project p)` Gets the pattern string for this RegularExpression in the given project.
`Substitution` `getRef(Project p)` Get the RegularExpression this reference refers to in the given project.
`void` `setExpression(java.lang.String expression)` Set the pattern string for this regular expression substitution.

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, 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

  The name of this data type

  See Also:
    Constant Field Values

Constructor Detail

### Substitution

    public Substitution()

  Constructor for Substitution.

Method Detail

### setExpression

    public void setExpression(java.lang.String expression)

  Set the pattern string for this regular expression substitution.

  Parameters:
    `expression` - the regular expression to use

### getExpression

    public java.lang.String getExpression(Project p)

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

  Parameters:
    `p` - the project to look for the regular expression if this object is a reference
  Returns:
    the pattern string

### getRef

    public Substitution getRef(Project p)

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

  Parameters:
    `p` - the project to look for the regular expression reference
  Returns:
    the resolved reference