com.google.api.client.http
Class AbstractInputStreamContent

java.lang.Object
  com.google.api.client.http.AbstractInputStreamContent

All Implemented Interfaces:

HttpContent

Direct Known Subclasses:

ByteArrayContent, FileContent, InputStreamContent

public abstract class AbstractInputStreamContent
extends Object
implements HttpContent

Serializes HTTP request content from an input stream into an output stream.

The type field is required. Subclasses should implement the HttpContent.getLength(), getInputStream(), and HttpContent.retrySupported() for their specific type of input stream.

Implementations don't need to be thread-safe.

Since:

1.4

Author:

moshenko@google.com (Jacob Moshenko)

Constructor Summary

AbstractInputStreamContent(String type)

Method Summary

static void	copy(InputStream inputStream, OutputStream outputStream) Writes the content provided by the given source input stream into the given destination output stream.
static void	copy(InputStream inputStream, OutputStream outputStream, boolean closeInputStream) Writes the content provided by the given source input stream into the given destination output stream.
boolean	getCloseInputStream() Returns whether the input stream should be closed at the end of writeTo(java.io.OutputStream).
String	getEncoding() Returns the content encoding (for example "gzip") or null for none.
abstract InputStream	getInputStream() Return an input stream for the specific implementation type of AbstractInputStreamContent.
String	getType() Returns the content type or null for none.
AbstractInputStreamContent	setCloseInputStream(boolean closeInputStream) Sets whether the input stream should be closed at the end of writeTo(java.io.OutputStream).
AbstractInputStreamContent	setEncoding(String encoding) Sets the content encoding (for example "gzip") or null for none.
AbstractInputStreamContent	setType(String type) Sets the content type or null for none.
void	writeTo(OutputStream out) Writes the content to the given output stream.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.api.client.http.HttpContent

getLength, retrySupported

Constructor Detail

AbstractInputStreamContent

public AbstractInputStreamContent(String type)

Parameters:

type - Content type or null for none

Since:

1.5

Method Detail

getInputStream

public abstract InputStream getInputStream()
                                    throws IOException

Return an input stream for the specific implementation type of AbstractInputStreamContent. If the specific implementation will return true for HttpContent.retrySupported() this should be a factory function which will create a new InputStream from the source data whenever invoked.

Upgrade warning: in prior version 1.6 getInputStream() was protected, it is now public.

Throws:

IOException

Since:

1.7

writeTo

public void writeTo(OutputStream out)
             throws IOException

Description copied from interface: HttpContent

Writes the content to the given output stream.

The recommendation for implementations is that they should not close the output stream. Callers should not assume whether or not the output stream has been closed. Implementations that do not close the output stream should flush it at the end of the method.

Specified by:

writeTo in interface HttpContent

Throws:

IOException

getEncoding

public String getEncoding()

Description copied from interface: HttpContent

Returns the content encoding (for example "gzip") or null for none.

Specified by:

getEncoding in interface HttpContent

getType

public String getType()

Description copied from interface: HttpContent

Returns the content type or null for none.

Specified by:

getType in interface HttpContent

getCloseInputStream

public final boolean getCloseInputStream()

Returns whether the input stream should be closed at the end of writeTo(java.io.OutputStream). Default is true.

Since:

1.7

setEncoding

public AbstractInputStreamContent setEncoding(String encoding)

Sets the content encoding (for example "gzip") or null for none. Subclasses should override by calling super.

Since:

1.5

setType

public AbstractInputStreamContent setType(String type)

Sets the content type or null for none. Subclasses should override by calling super.

Since:

1.5

setCloseInputStream

public AbstractInputStreamContent setCloseInputStream(boolean closeInputStream)

Sets whether the input stream should be closed at the end of writeTo(java.io.OutputStream). Default is true. Subclasses should override by calling super.

Since:

1.7

copy

public static void copy(InputStream inputStream,
                        OutputStream outputStream)
                 throws IOException

Writes the content provided by the given source input stream into the given destination output stream.

The input stream is guaranteed to be closed at the end of this method.

Sample use:

  static void downloadMedia(HttpResponse response, File file)
      throws IOException {
    FileOutputStream out = new FileOutputStream(file);
    try {
      AbstractInputStreamContent.copy(response.getContent(), out);
    } finally {
      out.close();
    }
  }
 

Parameters:

inputStream - source input stream

outputStream - destination output stream

Throws:

IOException

copy

public static void copy(InputStream inputStream,
                        OutputStream outputStream,
                        boolean closeInputStream)
                 throws IOException

Writes the content provided by the given source input stream into the given destination output stream.

Sample use:

  static void downloadMedia(HttpResponse response, File file)
      throws IOException {
    FileOutputStream out = new FileOutputStream(file);
    try {
      AbstractInputStreamContent.copy(response.getContent(), out, true);
    } finally {
      out.close();
    }
  }
 

Parameters:

inputStream - source input stream

outputStream - destination output stream

closeInputStream - whether the input stream should be closed at the end of this method

Throws:

IOException

Since:

1.7