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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.xerces.dom;
import java.io.InputStream;
import java.io.Reader;
import org.w3c.dom.ls.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.
*
* @xerces.internal
*
* @author Gopal Sharma, SUN Microsystems Inc.
* @version $Id: DOMInputImpl.java 699892 2008-09-28 21:08:27Z mrglavas $
*/
// REVISIT:
// 1. it should be possible to do the following
// DOMInputImpl extends XMLInputSource implements LSInput
// 2. we probably need only the default constructor. -- el
public class DOMInputImpl implements LSInput {
//
// Data
//
protected String fPublicId = null;
protected String fSystemId = null;
protected String fBaseSystemId = null;
protected InputStream fByteStream = null;
protected Reader fCharStream = null;
protected String fData = null;
protected String fEncoding = null;
protected boolean fCertifiedText = false;
/**
* Default Constructor, constructs an input source
*
*
*/
public DOMInputImpl() {}
/**
* 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.
*
* @param publicId The public identifier, if known.
* @param 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.
* @param baseSystemId The base system identifier. This value should
* always be set to the fully expanded URI of the
* base system identifier, if possible.
*/
public DOMInputImpl(String publicId, String systemId,
String baseSystemId) {
fPublicId = publicId;
fSystemId = systemId;
fBaseSystemId = baseSystemId;
} // DOMInputImpl(String,String,String)
/**
* Constructs an input source from a byte stream.
*
* @param publicId The public identifier, if known.
* @param 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.
* @param baseSystemId The base system identifier. This value should
* always be set to the fully expanded URI of the
* base system identifier, if possible.
* @param byteStream The byte stream.
* @param encoding The encoding of the byte stream, if known.
*/
public DOMInputImpl(String publicId, String systemId,
String baseSystemId, InputStream byteStream,
String encoding) {
fPublicId = publicId;
fSystemId = systemId;
fBaseSystemId = baseSystemId;
fByteStream = byteStream;
fEncoding = encoding;
} // DOMInputImpl(String,String,String,InputStream,String)
/**
* Constructs an input source from a character stream.
*
* @param publicId The public identifier, if known.
* @param 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.
* @param baseSystemId The base system identifier. This value should
* always be set to the fully expanded URI of the
* base system identifier, if possible.
* @param charStream The character stream.
* @param encoding The original encoding of the byte stream
* used by the reader, if known.
*/
public DOMInputImpl(String publicId, String systemId,
String baseSystemId, Reader charStream,
String encoding) {
fPublicId = publicId;
fSystemId = systemId;
fBaseSystemId = baseSystemId;
fCharStream = charStream;
fEncoding = encoding;
} // DOMInputImpl(String,String,String,Reader,String)
/**
* Constructs an input source from a String.
*
* @param publicId The public identifier, if known.
* @param 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.
* @param baseSystemId The base system identifier. This value should
* always be set to the fully expanded URI of the
* base system identifier, if possible.
* @param data The String Data.
* @param encoding The original encoding of the byte stream
* used by the reader, if known.
*/
public DOMInputImpl(String publicId, String systemId,
String baseSystemId, String data,
String encoding) {
fPublicId = publicId;
fSystemId = systemId;
fBaseSystemId = baseSystemId;
fData = data;
fEncoding = encoding;
} // DOMInputImpl(String,String,String,String,String)
/**
* 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.
*/
public InputStream getByteStream(){
return fByteStream;
}
/**
* 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.
*/
public void setByteStream(InputStream byteStream){
fByteStream = byteStream;
}
/**
* 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.
*/
public Reader getCharacterStream(){
return fCharStream;
}
/**
* 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.
*/
public void setCharacterStream(Reader characterStream){
fCharStream = characterStream;
}
/**
* 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.
*/
public String getStringData(){
return fData;
}
/**
* 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.
*/
public void setStringData(String stringData){
fData = stringData;
}
/**
* 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 .
*/
public String getEncoding(){
return fEncoding;
}
/**
* 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 .
*/
public void setEncoding(String encoding){
fEncoding = encoding;
}
/**
* 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.
*/
public String getPublicId(){
return fPublicId;
}
/**
* 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.
*/
public void setPublicId(String publicId){
fPublicId = publicId;
}
/**
* 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.
*/
public String getSystemId(){
return fSystemId;
}
/**
* 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.
*/
public void setSystemId(String systemId){
fSystemId = systemId;
}
/**
* 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.
*/
public String getBaseURI(){
return fBaseSystemId;
}
/**
* 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.
*/
public void setBaseURI(String baseURI){
fBaseSystemId = baseURI;
}
/**
* If set to true, assume that the input is certified (see section 2.13
* in [XML 1.1]) when
* parsing [XML 1.1].
*/
public boolean getCertifiedText(){
return fCertifiedText;
}
/**
* If set to true, assume that the input is certified (see section 2.13
* in [XML 1.1]) when
* parsing [XML 1.1].
*/
public void setCertifiedText(boolean certifiedText){
fCertifiedText = certifiedText;
}
}// class DOMInputImpl