Package org.apache.tools.ant.filters

# Class TabsToSpaces

java.lang.Object
java.io.Reader
java.io.FilterReader
org.apache.tools.ant.filters.BaseFilterReader
org.apache.tools.ant.filters.BaseParamFilterReader
org.apache.tools.ant.filters.TabsToSpaces

All Implemented Interfaces:
  `Closeable`, `AutoCloseable`, `Readable`, `ChainableReader`, `Parameterizable`

public final class TabsToSpaces extends BaseParamFilterReader implements ChainableReader
Converts tabs to spaces. Example:

    <tabstospaces tablength="8"/>

Or:

    <filterreader classname="org.apache.tools.ant.filters.TabsToSpaces">
       <param name="tablength" value="8"/>
     </filterreader>

- ## Field Summary

  ### Fields inherited from class java.io.FilterReader

  `in`

  ### Fields inherited from class java.io.Reader

  `lock`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `TabsToSpaces()`
  Constructor for "dummy" instances.
  `TabsToSpaces(Reader in)`
  Creates a new filtered reader.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `Reader`
  `chain(Reader rdr)`
  Creates a new TabsToSpaces using the passed in Reader for instantiation.
  `int`
  `read()`
  Returns the next character in the filtered stream, converting tabs to the specified number of spaces.
  `void`
  `setTablength(int tabLength)`
  Sets the tab length.

  ### Methods inherited from class org.apache.tools.ant.filters.BaseParamFilterReader

  `getParameters, setParameters`

  ### Methods inherited from class org.apache.tools.ant.filters.BaseFilterReader

  `getInitialized, getProject, read, readFully, readLine, setInitialized, setProject, skip`

  ### Methods inherited from class java.io.FilterReader

  `close, mark, markSupported, ready, reset`

  ### Methods inherited from class java.io.Reader

  `nullReader, read, read, transferTo`

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

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

- ## Constructor Details

  - ### TabsToSpaces

    public TabsToSpaces()
    Constructor for "dummy" instances.
    See Also:
      - `BaseFilterReader()`

  - ### TabsToSpaces

    public TabsToSpaces(Reader in)
    Creates a new filtered reader.
    Parameters:
      `in` - A Reader object providing the underlying stream. Must not be `null`.

- ## Method Details

  - ### read

    public int read() throws IOException
    Returns the next character in the filtered stream, converting tabs to the specified number of spaces.
    Overrides:
      `read` in class `FilterReader`
    Returns:
      the next character in the resulting stream, or -1 if the end of the resulting stream has been reached
    Throws:
      `IOException` - if the underlying stream throws an IOException during reading

  - ### setTablength

    public void setTablength(int tabLength)
    Sets the tab length.
    Parameters:
      `tabLength` - the number of spaces to be used when converting a tab.

  - ### chain

    public Reader chain(Reader rdr)
    Creates a new TabsToSpaces using the passed in Reader for instantiation.
    Specified by:
      `chain` in interface `ChainableReader`
    Parameters:
      `rdr` - A Reader object providing the underlying stream. Must not be `null`.
    Returns:
      a new filter based on this configuration, but filtering the specified reader