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## org.apache.poi.util
Class BoundedInputStream

    java.lang.Object
      java.io.InputStream
          org.apache.poi.util.BoundedInputStream

All Implemented Interfaces:
  java.io.Closeable

    public class BoundedInputStream

extends java.io.InputStream

This is a stream that will only supply bytes up to a certain length - if its position goes above that, it will stop.

This is useful to wrap ServletInputStreams. The ServletInputStream will block if you try to read content from it that isn't there, because it doesn't know whether the content hasn't arrived yet or whether the content has finished. So, one of these, initialized with the Content-length sent in the ServletInputStream's header, will stop it blocking, providing it's been sent with a correct content length.

Since:
  Commons IO 2.0
Version:
  $Id$

Constructor Summary
`BoundedInputStream(java.io.InputStream in)` Creates a new `BoundedInputStream` that wraps the given input stream and is unlimited.
`BoundedInputStream(java.io.InputStream in, long size)` Creates a new `BoundedInputStream` that wraps the given input stream and limits it to a certain size.

Method Summary
`int` | `available()`
`void` | `close()` Invokes the delegate's `close()` method if `isPropagateClose()` is `true`.
`boolean` | `isPropagateClose()` Indicates whether the `close()` method should propagate to the underling `InputStream`.
`void` | `mark(int readlimit)` Invokes the delegate's `mark(int)` method.
`boolean` | `markSupported()` Invokes the delegate's `markSupported()` method.
`int` | `read()` Invokes the delegate's `read()` method if the current position is less than the limit.
`int` | `read(byte[] b)` Invokes the delegate's `read(byte[])` method.
`int` | `read(byte[] b, int off, int len)` Invokes the delegate's `read(byte[], int, int)` method.
`void` | `reset()` Invokes the delegate's `reset()` method.
`void` | `setPropagateClose(boolean propagateClose)` Set whether the `close()` method should propagate to the underling `InputStream`.
`long` | `skip(long n)` Invokes the delegate's `skip(long)` method.
`java.lang.String` | `toString()` Invokes the delegate's `toString()` method.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### BoundedInputStream

    public BoundedInputStream(java.io.InputStream in,
                              long size)

  Creates a new `BoundedInputStream` that wraps the given input stream and limits it to a certain size.

  Parameters:
    `in` - The wrapped input stream
    `size` - The maximum number of bytes to return

### BoundedInputStream

    public BoundedInputStream(java.io.InputStream in)

  Creates a new `BoundedInputStream` that wraps the given input stream and is unlimited.

  Parameters:
    `in` - The wrapped input stream

Method Detail

### read

    public int read()
             throws java.io.IOException

  Invokes the delegate's `read()` method if the current position is less than the limit.

  Specified by:
    `read` in class `java.io.InputStream`
  Returns:
    the byte read or -1 if the end of stream or the limit has been reached.
  Throws:
    `java.io.IOException` - if an I/O error occurs

### read

    public int read(byte[] b)
             throws java.io.IOException

  Invokes the delegate's `read(byte[])` method.

  Overrides:
    `read` in class `java.io.InputStream`
  Parameters:
    `b` - the buffer to read the bytes into
  Returns:
    the number of bytes read or -1 if the end of stream or the limit has been reached.
  Throws:
    `java.io.IOException` - if an I/O error occurs

### read

    public int read(byte[] b,
                    int off,
                    int len)
             throws java.io.IOException

  Invokes the delegate's `read(byte[], int, int)` method.

  Overrides:
    `read` in class `java.io.InputStream`
  Parameters:
    `b` - the buffer to read the bytes into
    `off` - The start offset
    `len` - The number of bytes to read
  Returns:
    the number of bytes read or -1 if the end of stream or the limit has been reached.
  Throws:
    `java.io.IOException` - if an I/O error occurs

### skip

    public long skip(long n)
              throws java.io.IOException

  Invokes the delegate's `skip(long)` method.

  Overrides:
    `skip` in class `java.io.InputStream`
  Parameters:
    `n` - the number of bytes to skip
  Returns:
    the actual number of bytes skipped
  Throws:
    `java.io.IOException` - if an I/O error occurs

### available

    public int available()
                  throws java.io.IOException

  Overrides:
    `available` in class `java.io.InputStream`
  Throws:
    `java.io.IOException`

### toString

    public java.lang.String toString()

  Invokes the delegate's `toString()` method.

  Overrides:
    `toString` in class `java.lang.Object`
  Returns:
    the delegate's `toString()`

### close

    public void close()
               throws java.io.IOException

  Invokes the delegate's `close()` method if `isPropagateClose()` is `true`.

  Specified by:
    `close` in interface `java.io.Closeable`
  Overrides:
    `close` in class `java.io.InputStream`
  Throws:
    `java.io.IOException` - if an I/O error occurs

### reset

    public void reset()
               throws java.io.IOException

  Invokes the delegate's `reset()` method.

  Overrides:
    `reset` in class `java.io.InputStream`
  Throws:
    `java.io.IOException` - if an I/O error occurs

### mark

    public void mark(int readlimit)

  Invokes the delegate's `mark(int)` method.

  Overrides:
    `mark` in class `java.io.InputStream`
  Parameters:
    `readlimit` - read ahead limit

### markSupported

    public boolean markSupported()

  Invokes the delegate's `markSupported()` method.

  Overrides:
    `markSupported` in class `java.io.InputStream`
  Returns:
    true if mark is supported, otherwise false

### isPropagateClose

    public boolean isPropagateClose()

  Indicates whether the `close()` method should propagate to the underling `InputStream`.

  Returns:
    `true` if calling `close()` propagates to the `close()` method of the underlying stream or `false` if it does not.

### setPropagateClose

    public void setPropagateClose(boolean propagateClose)

  Set whether the `close()` method should propagate to the underling `InputStream`.

  Parameters:
    `propagateClose` - `true` if calling `close()` propagates to the `close()` method of the underlying stream or `false` if it does not.

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Copyright 2017 The Apache Software Foundation or its licensors, as applicable.