org.apache.tools.ant.util

## Class LazyFileOutputStream

- java.lang.Object
- - java.io.OutputStream
  - - org.apache.tools.ant.util.LazyFileOutputStream

All Implemented Interfaces:
  java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

    public class LazyFileOutputStream
    extends java.io.OutputStream

Class that delays opening the output file until the first bytes shall be written or the method `open` has been invoked explicitly.

Since:
  Ant 1.6

### Constructor Summary

Constructors
Constructor and Description
`LazyFileOutputStream(java.io.File f)` Creates a stream that will eventually write to the file with the given name and replace it.
`LazyFileOutputStream(java.io.File file, boolean append)` Creates a stream that will eventually write to the file with the given name and optionally append to instead of replacing it.
`LazyFileOutputStream(java.io.File file, boolean append, boolean alwaysCreate)` Creates a stream that will eventually write to the file with the given name, optionally append to instead of replacing it, and optionally always create a file (even if zero length).
`LazyFileOutputStream(java.lang.String name)` Creates a stream that will eventually write to the file with the given name and replace it.
`LazyFileOutputStream(java.lang.String name, boolean append)` Creates a stream that will eventually write to the file with the given name and optionally append to instead of replacing it.

### Method Summary

All Methods Instance Methods Concrete Methods
`void` `close()` Close the file.
`void` `open()` Explicitly open the file for writing.
`void` `write(byte[] b)` Delegates to the three-arg version.
`void` `write(byte[] b, int offset, int len)` Write part of a byte array.
`void` `write(int b)` Write a byte.

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

`flush`

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

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

### Constructor Detail

#### LazyFileOutputStream

    public LazyFileOutputStream(java.lang.String name)

Creates a stream that will eventually write to the file with the given name and replace it.

Parameters:
  `name` - the filename.

#### LazyFileOutputStream

    public LazyFileOutputStream(java.lang.String name,
                                boolean append)

Creates a stream that will eventually write to the file with the given name and optionally append to instead of replacing it.

Parameters:
  `name` - the filename.
  `append` - if true append rather than replace.

#### LazyFileOutputStream

    public LazyFileOutputStream(java.io.File f)

Creates a stream that will eventually write to the file with the given name and replace it.

Parameters:
  `f` - the file to create.

#### LazyFileOutputStream

    public LazyFileOutputStream(java.io.File file,
                                boolean append)

Creates a stream that will eventually write to the file with the given name and optionally append to instead of replacing it.

Parameters:
  `file` - the file to create.
  `append` - if true append rather than replace.

#### LazyFileOutputStream

    public LazyFileOutputStream(java.io.File file,
                                boolean append,
                                boolean alwaysCreate)

Creates a stream that will eventually write to the file with the given name, optionally append to instead of replacing it, and optionally always create a file (even if zero length).

Parameters:
  `file` - the file to create.
  `append` - if true append rather than replace.
  `alwaysCreate` - if true create the file even if nothing to write.

### Method Detail

#### open

    public void open()
              throws java.io.IOException

Explicitly open the file for writing.

Returns silently if the file has already been opened.

Throws:
  `java.io.IOException` - if there is an error.

#### close

    public void close()
               throws java.io.IOException

Close the file.

Specified by:
  `close` in interface `java.io.Closeable`
Specified by:
  `close` in interface `java.lang.AutoCloseable`
Overrides:
  `close` in class `java.io.OutputStream`
Throws:
  `java.io.IOException` - if there is an error.

#### write

    public void write(byte[] b)
               throws java.io.IOException

Delegates to the three-arg version.

Overrides:
  `write` in class `java.io.OutputStream`
Parameters:
  `b` - the bytearray to write.
Throws:
  `java.io.IOException` - if there is a problem.

#### write

    public void write(byte[] b,
                      int offset,
                      int len)
               throws java.io.IOException

Write part of a byte array.

Overrides:
  `write` in class `java.io.OutputStream`
Parameters:
  `b` - the byte array.
  `offset` - write from this index.
  `len` - the number of bytes to write.
Throws:
  `java.io.IOException` - if there is a problem.

#### write

    public void write(int b)
               throws java.io.IOException

Write a byte.

Specified by:
  `write` in class `java.io.OutputStream`
Parameters:
  `b` - the byte to write.
Throws:
  `java.io.IOException` - if there is a problem.