org.apache.tools.ant.taskdefs

## Class Replace

- java.lang.Object
- - org.apache.tools.ant.ProjectComponent
  - - org.apache.tools.ant.Task
    - - org.apache.tools.ant.taskdefs.MatchingTask
      - - org.apache.tools.ant.taskdefs.Replace

All Implemented Interfaces:
  java.lang.Cloneable, SelectorContainer

    public class Replace
    extends MatchingTask

Replaces all occurrences of one or more string tokens with given values in the indicated files. Each value can be either a string or the value of a property available in a designated property file. If you want to replace a text that crosses line boundaries, you must use a nested `<replacetoken>` element.

Since:
  Ant 1.1

### Nested Class Summary

Nested Classes
`class` `Replace.NestedString` An inline string to use as the replacement text.
`class` `Replace.Replacefilter` A filter to apply.

### Field Summary

### Fields inherited from class org.apache.tools.ant.taskdefs.MatchingTask

`fileset`

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

`target, taskName, taskType, wrapper`

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

`description, location, project`

### Constructor Summary

Constructors
Constructor and Description
`Replace()`

### Method Summary

All Methods Instance Methods Concrete Methods
`void` `addConfigured(ResourceCollection rc)` Support arbitrary file system based resource collections.
`Replace.Replacefilter` `createReplacefilter()` Add a nested <replacefilter> element.
`Replace.NestedString` `createReplaceToken()` Create a token to filter as the text of a nested element.
`Replace.NestedString` `createReplaceValue()` Create a string to replace the token as the text of a nested element.
`void` `execute()` Do the execution.
`java.util.Properties` `getProperties(java.io.File propertyFile)` Load a properties file.
`java.util.Properties` `getProperties(Resource propertyResource)` Load a properties resource.
`void` `setDir(java.io.File dir)` The base directory to use when replacing a token in multiple files; required if `file` is not defined.
`void` `setEncoding(java.lang.String encoding)` Set the file encoding to use on the files read and written by the task; optional, defaults to default JVM encoding.
`void` `setFailOnNoReplacements(boolean b)` Whether the build should fail if nothing has been replaced.
`void` `setFile(java.io.File file)` Set the source file; required unless `dir` is set.
`void` `setPreserveLastModified(boolean b)` Whether the file timestamp shall be preserved even if the file is modified.
`void` `setPropertyFile(java.io.File propertyFile)` The name of a property file from which properties specified using nested `<replacefilter>` elements are drawn; required only if the property attribute of `<replacefilter>` is used.
`void` `setPropertyResource(Resource propertyResource)` A resource from which properties specified using nested `<replacefilter>` elements are drawn; required only if the property attribute of `<replacefilter>` is used.
`void` `setReplaceFilterFile(java.io.File replaceFilterFile)` Sets the name of a property file containing filters; optional.
`void` `setReplaceFilterResource(Resource replaceFilter)` Sets the name of a resource containing filters; optional.
`void` `setSummary(boolean summary)` Indicates whether a summary of the replace operation should be produced, detailing how many token occurrences and files were processed; optional, default=`false`.
`void` `setToken(java.lang.String token)` Set the string token to replace; required unless a nested `replacetoken` element or the `replacefilterresource` attribute is used.
`void` `setValue(java.lang.String value)` Set the string value to use as token replacement; optional, default is the empty string "".
`void` `validateAttributes()` Validate attributes provided for this task in .xml build file.
`void` `validateReplacefilters()` Validate nested elements.

### Methods inherited from class org.apache.tools.ant.taskdefs.MatchingTask

`add, addAnd, addContains, addContainsRegexp, addCustom, addDate, addDepend, addDepth, addDifferent, addFilename, addMajority, addModified, addNone, addNot, addOr, addPresent, addSelector, addSize, addType, appendSelector, createExclude, createExcludesFile, createInclude, createIncludesFile, createPatternSet, getDirectoryScanner, getImplicitFileSet, getSelectors, hasSelectors, selectorCount, selectorElements, setCaseSensitive, setDefaultexcludes, setExcludes, setExcludesfile, setFollowSymlinks, setIncludes, setIncludesfile, setProject, XsetIgnore, XsetItems`

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

`bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType`

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

`clone, getDescription, getLocation, getProject, setDescription, setLocation`

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

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

### Constructor Detail

#### Replace

    public Replace()

### Method Detail

#### execute

    public void execute()
                 throws BuildException

Do the execution.

Overrides:
  `execute` in class `Task`
Throws:
  `BuildException` - if we can't build

#### validateAttributes

    public void validateAttributes()
                            throws BuildException

Validate attributes provided for this task in .xml build file.

Throws:
  `BuildException` - if any supplied attribute is invalid or any mandatory attribute is missing.

#### validateReplacefilters

    public void validateReplacefilters()
                                throws BuildException

Validate nested elements.

Throws:
  `BuildException` - if any supplied attribute is invalid or any mandatory attribute is missing.

#### getProperties

    public java.util.Properties getProperties(java.io.File propertyFile)
                                       throws BuildException

Load a properties file.

Parameters:
  `propertyFile` - the file to load the properties from.
Returns:
  loaded `Properties` object.
Throws:
  `BuildException` - if the file could not be found or read.

#### getProperties

    public java.util.Properties getProperties(Resource propertyResource)
                                       throws BuildException

Load a properties resource.

Parameters:
  `propertyResource` - the resource to load the properties from.
Returns:
  loaded `Properties` object.
Throws:
  `BuildException` - if the resource could not be found or read.
Since:
  Ant 1.8.0

#### setFile

    public void setFile(java.io.File file)

Set the source file; required unless `dir` is set.

Parameters:
  `file` - source `File`.

#### setSummary

    public void setSummary(boolean summary)

Indicates whether a summary of the replace operation should be produced, detailing how many token occurrences and files were processed; optional, default=`false`.

Parameters:
  `summary` - `boolean` whether a summary of the replace operation should be logged.

#### setReplaceFilterFile

    public void setReplaceFilterFile(java.io.File replaceFilterFile)

Sets the name of a property file containing filters; optional. Each property will be treated as a replacefilter where token is the name of the property and value is the value of the property.

Parameters:
  `replaceFilterFile` - `File` to load.

#### setReplaceFilterResource

    public void setReplaceFilterResource(Resource replaceFilter)

Sets the name of a resource containing filters; optional. Each property will be treated as a replacefilter where token is the name of the property and value is the value of the property.

Parameters:
  `replaceFilter` - `Resource` to load.
Since:
  Ant 1.8.0

#### setDir

    public void setDir(java.io.File dir)

The base directory to use when replacing a token in multiple files; required if `file` is not defined.

Parameters:
  `dir` - `File` representing the base directory.

#### setToken

    public void setToken(java.lang.String token)

Set the string token to replace; required unless a nested `replacetoken` element or the `replacefilterresource` attribute is used.

Parameters:
  `token` - token `String`.

#### setValue

    public void setValue(java.lang.String value)

Set the string value to use as token replacement; optional, default is the empty string "".

Parameters:
  `value` - replacement value.

#### setEncoding

    public void setEncoding(java.lang.String encoding)

Set the file encoding to use on the files read and written by the task; optional, defaults to default JVM encoding.

Parameters:
  `encoding` - the encoding to use on the files.

#### createReplaceToken

    public Replace.NestedString createReplaceToken()

Create a token to filter as the text of a nested element.

Returns:
  nested token `NestedString` to configure.

#### createReplaceValue

    public Replace.NestedString createReplaceValue()

Create a string to replace the token as the text of a nested element.

Returns:
  replacement value `NestedString` to configure.

#### setPropertyFile

    public void setPropertyFile(java.io.File propertyFile)

The name of a property file from which properties specified using nested `<replacefilter>` elements are drawn; required only if the property attribute of `<replacefilter>` is used.

Parameters:
  `propertyFile` - `File` to load.

#### setPropertyResource

    public void setPropertyResource(Resource propertyResource)

A resource from which properties specified using nested `<replacefilter>` elements are drawn; required only if the property attribute of `<replacefilter>` is used.

Parameters:
  `propertyResource` - `Resource` to load.
Since:
  Ant 1.8.0

#### createReplacefilter

    public Replace.Replacefilter createReplacefilter()

Add a nested <replacefilter> element.

Returns:
  a nested `Replacefilter` object to be configured.

#### addConfigured

    public void addConfigured(ResourceCollection rc)

Support arbitrary file system based resource collections.

Parameters:
  `rc` - ResourceCollection
Since:
  Ant 1.8.0

#### setPreserveLastModified

    public void setPreserveLastModified(boolean b)

Whether the file timestamp shall be preserved even if the file is modified.

Parameters:
  `b` - boolean
Since:
  Ant 1.8.0

#### setFailOnNoReplacements

    public void setFailOnNoReplacements(boolean b)

Whether the build should fail if nothing has been replaced.

Parameters:
  `b` - boolean
Since:
  Ant 1.8.0