javax.xml.parsers.SAXParser Maven / Gradle / Ivy
/*
* 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.
*/
// $Id: SAXParser.java 584483 2007-10-14 02:54:48Z mrglavas $
package javax.xml.parsers;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.validation.Schema;
import org.xml.sax.HandlerBase;
import org.xml.sax.InputSource;
import org.xml.sax.Parser;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
/**
* Defines the API that wraps an {@link org.xml.sax.XMLReader}
* implementation class. In JAXP 1.0, this class wrapped the
* {@link org.xml.sax.Parser} interface, however this interface was
* replaced by the {@link org.xml.sax.XMLReader}. For ease
* of transition, this class continues to support the same name
* and interface as well as supporting new methods.
*
* An instance of this class can be obtained from the
* {@link javax.xml.parsers.SAXParserFactory#newSAXParser()} method.
* Once an instance of this class is obtained, XML can be parsed from
* a variety of input sources. These input sources are InputStreams,
* Files, URLs, and SAX InputSources.
*
* This static method creates a new factory instance based
* on a system property setting or uses the platform default
* if no property has been defined.
*
* The system property that controls which Factory implementation
* to create is named "javax.xml.parsers.SAXParserFactory".
* This property names a class that is a concrete subclass of this
* abstract class. If no property is defined, a platform default
* will be used.
*
* As the content is parsed by the underlying parser, methods of the
* given {@link org.xml.sax.HandlerBase} or the
* {@link org.xml.sax.helpers.DefaultHandler} are called.
*
* Implementors of this class which wrap an underlaying implementation
* can consider using the {@link org.xml.sax.helpers.ParserAdapter}
* class to initially adapt their SAX1 implementation to work under
* this revised class.
*
* @author Jeff Suttor
* @version $Revision: 584483 $, $Date: 2007-10-13 22:54:48 -0400 (Sat, 13 Oct 2007) $
*/
public abstract class SAXParser {
private static final boolean DEBUG = false;
/**
*
Protected constructor to prevent instantiation.
* Use {@link javax.xml.parsers.SAXParserFactory#newSAXParser()}.
*/
protected SAXParser () {
}
/**
* Reset this SAXParser to its original configuration.
*
* SAXParser is reset to the same state as when it was created with
* {@link SAXParserFactory#newSAXParser()}.
* reset() is designed to allow the reuse of existing SAXParsers
* thus saving resources associated with the creation of new SAXParsers.
*
* The reset SAXParser is not guaranteed to have the same {@link Schema}
* Object, e.g. {@link Object#equals(Object obj)}. It is guaranteed to have a functionally equal
* Schema.
*
* @since 1.5
*/
public void reset() {
// implementors should override this method
throw new UnsupportedOperationException(
"This SAXParser, \"" + this.getClass().getName() + "\", does not support the reset functionality."
+ " Specification \"" + this.getClass().getPackage().getSpecificationTitle() + "\""
+ " version \"" + this.getClass().getPackage().getSpecificationVersion() + "\""
);
}
/**
* Parse the content of the given {@link java.io.InputStream}
* instance as XML using the specified {@link org.xml.sax.HandlerBase}.
* Use of the DefaultHandler version of this method is recommended as
* the HandlerBase class has been deprecated in SAX 2.0.
*
* @param is InputStream containing the content to be parsed.
* @param hb The SAX HandlerBase to use.
*
* @throws IllegalArgumentException If the given InputStream is null.
* @throws SAXException If parse produces a SAX error.
* @throws IOException If an IO error occurs interacting with the
* InputStream.
*
* @see org.xml.sax.DocumentHandler
*/
public void parse(InputStream is, HandlerBase hb)
throws SAXException, IOException {
if (is == null) {
throw new IllegalArgumentException("InputStream cannot be null");
}
InputSource input = new InputSource(is);
this.parse(input, hb);
}
/**
* Parse the content of the given {@link java.io.InputStream}
* instance as XML using the specified {@link org.xml.sax.HandlerBase}.
* Use of the DefaultHandler version of this method is recommended as
* the HandlerBase class has been deprecated in SAX 2.0.
*
* @param is InputStream containing the content to be parsed.
* @param hb The SAX HandlerBase to use.
* @param systemId The systemId which is needed for resolving relative URIs.
*
* @throws IllegalArgumentException If the given InputStream is
* null.
* @throws IOException If any IO error occurs interacting with the
* InputStream.
* @throws SAXException If any SAX errors occur during processing.
*
* @see org.xml.sax.DocumentHandler version of this method instead.
*/
public void parse(
InputStream is,
HandlerBase hb,
String systemId)
throws SAXException, IOException {
if (is == null) {
throw new IllegalArgumentException("InputStream cannot be null");
}
InputSource input = new InputSource(is);
input.setSystemId(systemId);
this.parse(input, hb);
}
/**
* Parse the content of the given {@link java.io.InputStream}
* instance as XML using the specified
* {@link org.xml.sax.helpers.DefaultHandler}.
*
* @param is InputStream containing the content to be parsed.
* @param dh The SAX DefaultHandler to use.
*
* @throws IllegalArgumentException If the given InputStream is null.
* @throws IOException If any IO errors occur.
* @throws SAXException If any SAX errors occur during processing.
*
* @see org.xml.sax.DocumentHandler
*/
public void parse(InputStream is, DefaultHandler dh)
throws SAXException, IOException {
if (is == null) {
throw new IllegalArgumentException("InputStream cannot be null");
}
InputSource input = new InputSource(is);
this.parse(input, dh);
}
/**
* Parse the content of the given {@link java.io.InputStream}
* instance as XML using the specified
* {@link org.xml.sax.helpers.DefaultHandler}.
*
* @param is InputStream containing the content to be parsed.
* @param dh The SAX DefaultHandler to use.
* @param systemId The systemId which is needed for resolving relative URIs.
*
* @throws IllegalArgumentException If the given InputStream is null.
* @throws IOException If any IO errors occur.
* @throws SAXException If any SAX errors occur during processing.
*
* @see org.xml.sax.DocumentHandler version of this method instead.
*/
public void parse(
InputStream is,
DefaultHandler dh,
String systemId)
throws SAXException, IOException {
if (is == null) {
throw new IllegalArgumentException("InputStream cannot be null");
}
InputSource input = new InputSource(is);
input.setSystemId(systemId);
this.parse(input, dh);
}
/**
* Parse the content described by the giving Uniform Resource
* Identifier (URI) as XML using the specified
* {@link org.xml.sax.HandlerBase}.
* Use of the DefaultHandler version of this method is recommended as
* the HandlerBase class has been deprecated in SAX 2.0
*
* @param uri The location of the content to be parsed.
* @param hb The SAX HandlerBase to use.
*
* @throws IllegalArgumentException If the uri is null.
* @throws IOException If any IO errors occur.
* @throws SAXException If any SAX errors occur during processing.
*
* @see org.xml.sax.DocumentHandler
*/
public void parse(String uri, HandlerBase hb)
throws SAXException, IOException {
if (uri == null) {
throw new IllegalArgumentException("uri cannot be null");
}
InputSource input = new InputSource(uri);
this.parse(input, hb);
}
/**
* Parse the content described by the giving Uniform Resource
* Identifier (URI) as XML using the specified
* {@link org.xml.sax.helpers.DefaultHandler}.
*
* @param uri The location of the content to be parsed.
* @param dh The SAX DefaultHandler to use.
*
* @throws IllegalArgumentException If the uri is null.
* @throws IOException If any IO errors occur.
* @throws SAXException If any SAX errors occur during processing.
*
* @see org.xml.sax.DocumentHandler
*/
public void parse(String uri, DefaultHandler dh)
throws SAXException, IOException {
if (uri == null) {
throw new IllegalArgumentException("uri cannot be null");
}
InputSource input = new InputSource(uri);
this.parse(input, dh);
}
/**
* Parse the content of the file specified as XML using the
* specified {@link org.xml.sax.HandlerBase}.
* Use of the DefaultHandler version of this method is recommended as
* the HandlerBase class has been deprecated in SAX 2.0
*
* @param f The file containing the XML to parse
* @param hb The SAX HandlerBase to use.
*
* @throws IllegalArgumentException If the File object is null.
* @throws IOException If any IO errors occur.
* @throws SAXException If any SAX errors occur during processing.
*
* @see org.xml.sax.DocumentHandler
*/
public void parse(File f, HandlerBase hb)
throws SAXException, IOException {
if (f == null) {
throw new IllegalArgumentException("File cannot be null");
}
String escapedURI = FilePathToURI.filepath2URI(f.getAbsolutePath());
if (DEBUG) {
System.out.println("Escaped URI = " + escapedURI);
}
InputSource input = new InputSource(escapedURI);
this.parse(input, hb);
}
/**
* Parse the content of the file specified as XML using the
* specified {@link org.xml.sax.helpers.DefaultHandler}.
*
* @param f The file containing the XML to parse
* @param dh The SAX DefaultHandler to use.
*
* @throws IllegalArgumentException If the File object is null.
* @throws IOException If any IO errors occur.
* @throws SAXException If any SAX errors occur during processing.
*
* @see org.xml.sax.DocumentHandler
*/
public void parse(File f, DefaultHandler dh)
throws SAXException, IOException {
if (f == null) {
throw new IllegalArgumentException("File cannot be null");
}
String escapedURI = FilePathToURI.filepath2URI(f.getAbsolutePath());
if (DEBUG) {
System.out.println("Escaped URI = " + escapedURI);
}
InputSource input = new InputSource(escapedURI);
this.parse(input, dh);
}
/**
* Parse the content given {@link org.xml.sax.InputSource}
* as XML using the specified
* {@link org.xml.sax.HandlerBase}.
* Use of the DefaultHandler version of this method is recommended as
* the HandlerBase class has been deprecated in SAX 2.0
*
* @param is The InputSource containing the content to be parsed.
* @param hb The SAX HandlerBase to use.
*
* @throws IllegalArgumentException If the InputSource object
* is null.
* @throws IOException If any IO errors occur.
* @throws SAXException If any SAX errors occur during processing.
*
* @see org.xml.sax.DocumentHandler
*/
public void parse(InputSource is, HandlerBase hb)
throws SAXException, IOException {
if (is == null) {
throw new IllegalArgumentException("InputSource cannot be null");
}
Parser parser = this.getParser();
if (hb != null) {
parser.setDocumentHandler(hb);
parser.setEntityResolver(hb);
parser.setErrorHandler(hb);
parser.setDTDHandler(hb);
}
parser.parse(is);
}
/**
* Parse the content given {@link org.xml.sax.InputSource}
* as XML using the specified
* {@link org.xml.sax.helpers.DefaultHandler}.
*
* @param is The InputSource containing the content to be parsed.
* @param dh The SAX DefaultHandler to use.
*
* @throws IllegalArgumentException If the InputSource object
* is null.
* @throws IOException If any IO errors occur.
* @throws SAXException If any SAX errors occur during processing.
*
* @see org.xml.sax.DocumentHandler
*/
public void parse(InputSource is, DefaultHandler dh)
throws SAXException, IOException {
if (is == null) {
throw new IllegalArgumentException("InputSource cannot be null");
}
XMLReader reader = this.getXMLReader();
if (dh != null) {
reader.setContentHandler(dh);
reader.setEntityResolver(dh);
reader.setErrorHandler(dh);
reader.setDTDHandler(dh);
}
reader.parse(is);
}
/**
* Returns the SAX parser that is encapsulated by the
* implementation of this class.
*
* @return The SAX parser that is encapsulated by the
* implementation of this class.
*
* @throws SAXException If any SAX errors occur during processing.
*/
public abstract org.xml.sax.Parser getParser() throws SAXException;
/**
* Returns the {@link org.xml.sax.XMLReader} that is encapsulated by the
* implementation of this class.
*
* @return The XMLReader that is encapsulated by the
* implementation of this class.
*
* @throws SAXException If any SAX errors occur during processing.
*/
public abstract org.xml.sax.XMLReader getXMLReader() throws SAXException;
/**
* Indicates whether or not this parser is configured to
* understand namespaces.
*
* @return true if this parser is configured to
* understand namespaces; false otherwise.
*/
public abstract boolean isNamespaceAware();
/**
* Indicates whether or not this parser is configured to
* validate XML documents.
*
* @return true if this parser is configured to
* validate XML documents; false otherwise.
*/
public abstract boolean isValidating();
/**
* Sets the particular property in the underlying implementation of
* {@link org.xml.sax.XMLReader}.
* A list of the core features and properties can be found at
*
* http://sax.sourceforge.net/?selected=get-set.
*
* @param name The name of the property to be set.
* @param value The value of the property to be set.
*
* @throws SAXNotRecognizedException When the underlying XMLReader does
* not recognize the property name.
* @throws SAXNotSupportedException When the underlying XMLReader
* recognizes the property name but doesn't support the property.
*
* @see org.xml.sax.XMLReader#setProperty
*/
public abstract void setProperty(String name, Object value)
throws SAXNotRecognizedException, SAXNotSupportedException;
/**
* Returns the particular property requested for in the underlying
* implementation of {@link org.xml.sax.XMLReader}.
*
* @param name The name of the property to be retrieved.
* @return Value of the requested property.
*
* @throws SAXNotRecognizedException When the underlying XMLReader does
* not recognize the property name.
* @throws SAXNotSupportedException When the underlying XMLReader
* recognizes the property name but doesn't support the property.
*
* @see org.xml.sax.XMLReader#getProperty
*/
public abstract Object getProperty(String name)
throws SAXNotRecognizedException, SAXNotSupportedException;
/** Get a reference to the the {@link Schema} being used by
* the XML processor.
*
* If no schema is being used, null is returned.
*
* @return {@link Schema} being used or null
* if none in use
*
* @throws UnsupportedOperationException
* For backward compatibility, when implementations for
* earlier versions of JAXP is used, this exception will be
* thrown.
*
* @since 1.5
*/
public Schema getSchema() {
throw new UnsupportedOperationException(
"This parser does not support specification \""
+ this.getClass().getPackage().getSpecificationTitle()
+ "\" version \""
+ this.getClass().getPackage().getSpecificationVersion()
+ "\""
);
}
/**
* Get the XInclude processing mode for this parser.
*
* @return
* the return value of
* the {@link SAXParserFactory#isXIncludeAware()}
* when this parser was created from factory.
*
* @throws UnsupportedOperationException
* For backward compatibility, when implementations for
* earlier versions of JAXP is used, this exception will be
* thrown.
*
* @since 1.5
*
* @see SAXParserFactory#setXIncludeAware(boolean)
*/
public boolean isXIncludeAware() {
throw new UnsupportedOperationException(
"This parser does not support specification \""
+ this.getClass().getPackage().getSpecificationTitle()
+ "\" version \""
+ this.getClass().getPackage().getSpecificationVersion()
+ "\""
);
}
}