Class StreamSource

java.lang.Object
javax.xml.transform.stream.StreamSource
All Implemented Interfaces:
Source
public class StreamSource extends Object implements Source

Acts as an holder for a transformation Source in the form of a stream of XML markup.

Note: Due to their internal use of either a Reader or InputStream instance, StreamSource instances may only be used once.

Since:
1.4

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final String
    FEATURE
    If TransformerFactory.getFeature(String) returns true when passed this value as an argument, the Transformer supports Source input of this type.

  • Constructor Summary

    Constructors
    Constructor
    Description
    StreamSource()
    Zero-argument default constructor.
    StreamSource(File f)
    Construct a StreamSource from a File.
    StreamSource(InputStream inputStream)
    Construct a StreamSource from a byte stream.
    StreamSource(InputStream inputStream, String systemId)
    Construct a StreamSource from a byte stream.
    StreamSource(Reader reader)
    Construct a StreamSource from a character reader.
    StreamSource(Reader reader, String systemId)
    Construct a StreamSource from a character reader.
    StreamSource(String systemId)
    Construct a StreamSource from a URL.

  • Method Summary

    Modifier and Type
    Method
    Description
    InputStream
    getInputStream()
    Get the byte stream that was set with setByteStream.
    String
    getPublicId()
    Get the public identifier that was set with setPublicId.
    Reader
    getReader()
    Get the character stream that was set with setReader.
    String
    getSystemId()
    Get the system identifier that was set with setSystemId.
    boolean
    isEmpty()
    Indicates whether the StreamSource object is empty.
    void
    setInputStream(InputStream inputStream)
    Set the byte stream to be used as input.
    void
    setPublicId(String publicId)
    Set the public identifier for this Source.
    void
    setReader(Reader reader)
    Set the input to be a character reader.
    void
    setSystemId(File f)
    Set the system ID from a File reference.
    void
    setSystemId(String systemId)
    Set the system identifier for this Source.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Field Details

  • Constructor Details

    • StreamSource

      public StreamSource()

      Zero-argument default constructor. If this constructor is used, and no Stream source is set using setInputStream(java.io.InputStream inputStream) or setReader(java.io.Reader reader), then the Transformer will create an empty source InputStream using new InputStream().

      See Also:

    • StreamSource

      public StreamSource(InputStream inputStream)
      Construct a StreamSource from a byte stream. Normally, a stream should be used rather than a reader, so the XML parser can resolve character encoding specified by the XML declaration.

      If this constructor is used to process a stylesheet, normally setSystemId should also be called, so that relative URI references can be resolved.

      Parameters:
      inputStream - A valid InputStream reference to an XML stream.

    • StreamSource

      public StreamSource(InputStream inputStream, String systemId)
      Construct a StreamSource from a byte stream. Normally, a stream should be used rather than a reader, so that the XML parser can resolve character encoding specified by the XML declaration.

      This constructor allows the systemID to be set in addition to the input stream, which allows relative URIs to be processed.

      Parameters:
      inputStream - A valid InputStream reference to an XML stream.
      systemId - Must be a String that conforms to the URI syntax.

    • StreamSource

      public StreamSource(Reader reader)
      Construct a StreamSource from a character reader. Normally, a stream should be used rather than a reader, so that the XML parser can resolve character encoding specified by the XML declaration. However, in many cases the encoding of the input stream is already resolved, as in the case of reading XML from a StringReader.
      Parameters:
      reader - A valid Reader reference to an XML character stream.

    • StreamSource

      public StreamSource(Reader reader, String systemId)
      Construct a StreamSource from a character reader. Normally, a stream should be used rather than a reader, so that the XML parser may resolve character encoding specified by the XML declaration. However, in many cases the encoding of the input stream is already resolved, as in the case of reading XML from a StringReader.
      Parameters:
      reader - A valid Reader reference to an XML character stream.
      systemId - Must be a String that conforms to the URI syntax.

    • StreamSource

      public StreamSource(String systemId)
      Construct a StreamSource from a URL.
      Parameters:
      systemId - Must be a String that conforms to the URI syntax.

    • StreamSource

      public StreamSource(File f)
      Construct a StreamSource from a File.
      Parameters:
      f - Must a non-null File reference.

  • Method Details

    • setInputStream

      public void setInputStream(InputStream inputStream)
      Set the byte stream to be used as input. Normally, a stream should be used rather than a reader, so that the XML parser can resolve character encoding specified by the XML declaration.

      If this Source object is used to process a stylesheet, normally setSystemId should also be called, so that relative URL references can be resolved.

      Parameters:
      inputStream - A valid InputStream reference to an XML stream.

    • getInputStream

      public InputStream getInputStream()
      Get the byte stream that was set with setByteStream.
      Returns:
      The byte stream that was set with setByteStream, or null if setByteStream or the ByteStream constructor was not called.

    • setReader

      public void setReader(Reader reader)
      Set the input to be a character reader. Normally, a stream should be used rather than a reader, so that the XML parser can resolve character encoding specified by the XML declaration. However, in many cases the encoding of the input stream is already resolved, as in the case of reading XML from a StringReader.
      Parameters:
      reader - A valid Reader reference to an XML CharacterStream.

    • getReader

      public Reader getReader()
      Get the character stream that was set with setReader.
      Returns:
      The character stream that was set with setReader, or null if setReader or the Reader constructor was not called.

    • setPublicId

      public void setPublicId(String publicId)
      Set the public identifier for this Source.

      The public identifier is always optional: if the application writer includes one, it will be provided as part of the location information.

      Parameters:
      publicId - The public identifier as a string.

    • getPublicId

      public String getPublicId()
      Get the public identifier that was set with setPublicId.
      Returns:
      The public identifier that was set with setPublicId, or null if setPublicId was not called.

    • setSystemId

      public void setSystemId(String systemId)
      Set the system identifier for this Source.

      The system identifier is optional if there is a byte stream or a character stream, but it is still useful to provide one, since the application can use it to resolve relative URIs and can include it in error messages and warnings (the parser will attempt to open a connection to the URI only if there is no byte stream or character stream specified).

      Specified by:
      setSystemId in interface Source
      Parameters:
      systemId - The system identifier as a URL string.

    • getSystemId

      public String getSystemId()
      Get the system identifier that was set with setSystemId.
      Specified by:
      getSystemId in interface Source
      Returns:
      The system identifier that was set with setSystemId, or null if setSystemId was not called.

    • setSystemId

      public void setSystemId(File f)
      Set the system ID from a File reference.
      Parameters:
      f - Must a non-null File reference.

    • isEmpty

      public boolean isEmpty()
      Indicates whether the StreamSource object is empty. Empty is defined as follows:
      • All of the input sources, including the public identifier, system identifier, byte stream, and character stream, are null.
      • The public identifier and system identifier are null, and byte and character stream are either null or contain no byte or character.

        Note that this method will reset the byte stream if it is provided, or the character stream if the byte stream is not provided.

      In case of error while checking the byte or character stream, the method will return false to allow the XML processor to handle the error.

      Specified by:
      isEmpty in interface Source
      Returns:
      true if the StreamSource object is empty, false otherwise