org.apache.xerces.dom

Class DOMInputImpl

java.lang.Object

org.apache.xerces.dom.DOMInputImpl

All Implemented Interfaces:

LSInput

public class DOMInputImpl
extends Object
implements LSInput

This Class DOMInputImpl represents a single input source for an XML entity.

This Class allows an application to encapsulate information about an input source in a single object, which may include a public identifier, a system identifier, a byte stream (possibly with a specified encoding), and/or a character stream.

The exact definitions of a byte stream and a character stream are binding dependent.

There are two places that the application will deliver this input source to the parser: as the argument to the parse method, or as the return value of the DOMResourceResolver.resolveEntity method.

The DOMParser will use the LSInput object to determine how to read XML input. If there is a character stream available, the parser will read that stream directly; if not, the parser will use a byte stream, if available; if neither a character stream nor a byte stream is available, the parser will attempt to open a URI connection to the resource identified by the system identifier.

An LSInput object belongs to the application: the parser shall never modify it in any way (it may modify a copy if necessary). Eventhough all attributes in this interface are writable the DOM implementation is expected to never mutate a LSInput.

See also the Document Object Model (DOM) Level 3 Abstract Schemas and Load and Save Specification.

Version:

$Id$

Author:

Gopal Sharma, SUN Microsystems Inc.

Field Summary

Fields

Modifier and Type	Field and Description
protected String	fBaseSystemId
protected InputStream	fByteStream
protected boolean	fCertifiedText
protected Reader	fCharStream
protected String	fData
protected String	fEncoding
protected String	fPublicId
protected String	fSystemId

Constructor Summary

Constructors

Constructor and Description
DOMInputImpl() Default Constructor, constructs an input source
DOMInputImpl(String publicId, String systemId, String baseSystemId) Constructs an input source from just the public and system identifiers, leaving resolution of the entity and opening of the input stream up to the caller.
DOMInputImpl(String publicId, String systemId, String baseSystemId, InputStream byteStream, String encoding) Constructs an input source from a byte stream.
DOMInputImpl(String publicId, String systemId, String baseSystemId, Reader charStream, String encoding) Constructs an input source from a character stream.
DOMInputImpl(String publicId, String systemId, String baseSystemId, String data, String encoding) Constructs an input source from a String.

Method Summary

Methods

Modifier and Type	Method and Description
String	getBaseURI() The base URI to be used (see section 5.1.4 in ) for resolving relative URIs to absolute URIs.
InputStream	getByteStream() An attribute of a language-binding dependent type that represents a stream of bytes.
boolean	getCertifiedText() If set to true, assume that the input is certified (see section 2.13 in [XML 1.1]) when parsing [XML 1.1].
Reader	getCharacterStream() An attribute of a language-binding dependent type that represents a stream of 16-bit units.
String	getEncoding() The character encoding, if known.
String	getPublicId() The public identifier for this input source.
String	getStringData() A string attribute that represents a sequence of 16 bit units (utf-16 encoded characters).
String	getSystemId() The system identifier, a URI reference , for this input source.
void	setBaseURI(String baseURI) The base URI to be used (see section 5.1.4 in ) for resolving relative URIs to absolute URIs.
void	setByteStream(InputStream byteStream) An attribute of a language-binding dependent type that represents a stream of bytes.
void	setCertifiedText(boolean certifiedText) If set to true, assume that the input is certified (see section 2.13 in [XML 1.1]) when parsing [XML 1.1].
void	setCharacterStream(Reader characterStream) An attribute of a language-binding dependent type that represents a stream of 16-bit units.
void	setEncoding(String encoding) The character encoding, if known.
void	setPublicId(String publicId) The public identifier for this input source.
void	setStringData(String stringData) A string attribute that represents a sequence of 16 bit units (utf-16 encoded characters).
void	setSystemId(String systemId) The system identifier, a URI reference , for this input source.

Methods inherited from class java.lang.Object

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

Field Detail

fPublicId

protected String fPublicId

fSystemId

protected String fSystemId

fBaseSystemId

protected String fBaseSystemId

fByteStream

protected InputStream fByteStream

fCharStream

protected Reader fCharStream

fData

protected String fData

fEncoding

protected String fEncoding

fCertifiedText

protected boolean fCertifiedText

Constructor Detail

DOMInputImpl

public DOMInputImpl()

Default Constructor, constructs an input source

DOMInputImpl

public DOMInputImpl(String publicId,
            String systemId,
            String baseSystemId)

Constructs an input source from just the public and system identifiers, leaving resolution of the entity and opening of the input stream up to the caller.

Parameters:

publicId - The public identifier, if known.

systemId - The system identifier. This value should always be set, if possible, and can be relative or absolute. If the system identifier is relative, then the base system identifier should be set.

baseSystemId - The base system identifier. This value should always be set to the fully expanded URI of the base system identifier, if possible.

DOMInputImpl

public DOMInputImpl(String publicId,
            String systemId,
            String baseSystemId,
            InputStream byteStream,
            String encoding)

Constructs an input source from a byte stream.

Parameters:

publicId - The public identifier, if known.

systemId - The system identifier. This value should always be set, if possible, and can be relative or absolute. If the system identifier is relative, then the base system identifier should be set.

baseSystemId - The base system identifier. This value should always be set to the fully expanded URI of the base system identifier, if possible.

byteStream - The byte stream.

encoding - The encoding of the byte stream, if known.

DOMInputImpl

public DOMInputImpl(String publicId,
            String systemId,
            String baseSystemId,
            Reader charStream,
            String encoding)

Constructs an input source from a character stream.

Parameters:

publicId - The public identifier, if known.

systemId - The system identifier. This value should always be set, if possible, and can be relative or absolute. If the system identifier is relative, then the base system identifier should be set.

baseSystemId - The base system identifier. This value should always be set to the fully expanded URI of the base system identifier, if possible.

charStream - The character stream.

encoding - The original encoding of the byte stream used by the reader, if known.

DOMInputImpl

public DOMInputImpl(String publicId,
            String systemId,
            String baseSystemId,
            String data,
            String encoding)

Constructs an input source from a String.

Parameters:

publicId - The public identifier, if known.

systemId - The system identifier. This value should always be set, if possible, and can be relative or absolute. If the system identifier is relative, then the base system identifier should be set.

baseSystemId - The base system identifier. This value should always be set to the fully expanded URI of the base system identifier, if possible.

data - The String Data.

encoding - The original encoding of the byte stream used by the reader, if known.

Method Detail

getByteStream

public InputStream getByteStream()

An attribute of a language-binding dependent type that represents a stream of bytes.
The parser will ignore this if there is also a character stream specified, but it will use a byte stream in preference to opening a URI connection itself.
If the application knows the character encoding of the byte stream, it should set the encoding property. Setting the encoding in this way will override any encoding specified in the XML declaration itself.

Specified by:

getByteStream in interface LSInput

setByteStream

public void setByteStream(InputStream byteStream)

An attribute of a language-binding dependent type that represents a stream of bytes.
The parser will ignore this if there is also a character stream specified, but it will use a byte stream in preference to opening a URI connection itself.
If the application knows the character encoding of the byte stream, it should set the encoding property. Setting the encoding in this way will override any encoding specified in the XML declaration itself.

Specified by:

setByteStream in interface LSInput

getCharacterStream

public Reader getCharacterStream()

An attribute of a language-binding dependent type that represents a stream of 16-bit units. Application must encode the stream using UTF-16 (defined in and Amendment 1 of ).
If a character stream is specified, the parser will ignore any byte stream and will not attempt to open a URI connection to the system identifier.

Specified by:

getCharacterStream in interface LSInput

setCharacterStream

public void setCharacterStream(Reader characterStream)

An attribute of a language-binding dependent type that represents a stream of 16-bit units. Application must encode the stream using UTF-16 (defined in and Amendment 1 of ).
If a character stream is specified, the parser will ignore any byte stream and will not attempt to open a URI connection to the system identifier.

Specified by:

setCharacterStream in interface LSInput

getStringData

public String getStringData()

A string attribute that represents a sequence of 16 bit units (utf-16 encoded characters).
If string data is available in the input source, the parser will ignore the character stream and the byte stream and will not attempt to open a URI connection to the system identifier.

Specified by:

getStringData in interface LSInput

setStringData

public void setStringData(String stringData)

A string attribute that represents a sequence of 16 bit units (utf-16 encoded characters).
If string data is available in the input source, the parser will ignore the character stream and the byte stream and will not attempt to open a URI connection to the system identifier.

Specified by:

setStringData in interface LSInput

getEncoding

public String getEncoding()

The character encoding, if known. The encoding must be a string acceptable for an XML encoding declaration ( section 4.3.3 "Character Encoding in Entities").
This attribute has no effect when the application provides a character stream. For other sources of input, an encoding specified by means of this attribute will override any encoding specified in the XML claration or the Text Declaration, or an encoding obtained from a higher level protocol, such as HTTP .

Specified by:

getEncoding in interface LSInput

setEncoding

public void setEncoding(String encoding)

The character encoding, if known. The encoding must be a string acceptable for an XML encoding declaration ( section 4.3.3 "Character Encoding in Entities").
This attribute has no effect when the application provides a character stream. For other sources of input, an encoding specified by means of this attribute will override any encoding specified in the XML claration or the Text Declaration, or an encoding obtained from a higher level protocol, such as HTTP .

Specified by:

setEncoding in interface LSInput

getPublicId

public String getPublicId()

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

Specified by:

getPublicId in interface LSInput

setPublicId

public void setPublicId(String publicId)

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

Specified by:

setPublicId in interface LSInput

getSystemId

public String getSystemId()

The system identifier, a URI reference , for this input 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 fetch the ressource identifier by the URI reference only if there is no byte stream or character stream specified).
If the application knows the character encoding of the object pointed to by the system identifier, it can register the encoding by setting the encoding attribute.
If the system ID is a relative URI reference (see section 5 in ), the behavior is implementation dependent.

Specified by:

getSystemId in interface LSInput

setSystemId

public void setSystemId(String systemId)

The system identifier, a URI reference , for this input 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 fetch the ressource identifier by the URI reference only if there is no byte stream or character stream specified).
If the application knows the character encoding of the object pointed to by the system identifier, it can register the encoding by setting the encoding attribute.
If the system ID is a relative URI reference (see section 5 in ), the behavior is implementation dependent.

Specified by:

setSystemId in interface LSInput

getBaseURI

public String getBaseURI()

The base URI to be used (see section 5.1.4 in ) for resolving relative URIs to absolute URIs. If the baseURI is itself a relative URI, the behavior is implementation dependent.

Specified by:

getBaseURI in interface LSInput

setBaseURI

public void setBaseURI(String baseURI)

The base URI to be used (see section 5.1.4 in ) for resolving relative URIs to absolute URIs. If the baseURI is itself a relative URI, the behavior is implementation dependent.

Specified by:

setBaseURI in interface LSInput

getCertifiedText

public boolean getCertifiedText()

If set to true, assume that the input is certified (see section 2.13 in [XML 1.1]) when parsing [XML 1.1].

Specified by:

getCertifiedText in interface LSInput

setCertifiedText

public void setCertifiedText(boolean certifiedText)

If set to true, assume that the input is certified (see section 2.13 in [XML 1.1]) when parsing [XML 1.1].

Specified by:

setCertifiedText in interface LSInput