SAXParser (Java Platform SE 8 )
Keywords: javax.xml.parsers.SAXParser class
Date: 2018-03-02

compact2, compact3
javax.xml.parsers

## Class SAXParser

- java.lang.Object
- - javax.xml.parsers.SAXParser

-     public abstract class SAXParser
      extends Object

  Defines the API that wraps an `XMLReader` implementation class. In JAXP 1.0, this class wrapped the `Parser` interface, however this interface was replaced by the `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 `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 `HandlerBase` or the `DefaultHandler` are called.

  Implementors of this class which wrap an underlaying implementation can consider using the `ParserAdapter` class to initially adapt their SAX1 implementation to work under this revised class.

- - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `SAXParser()` Protected constructor to prevent instaniation.

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `abstract Parser` | `getParser()` Returns the SAX parser that is encapsultated by the implementation of this class.
    `abstract Object` | `getProperty(String name)` Returns the particular property requested for in the underlying implementation of `XMLReader`.
    `Schema` | `getSchema()` Get a reference to the the `Schema` being used by the XML processor.
    `abstract XMLReader` | `getXMLReader()` Returns the `XMLReader` that is encapsulated by the implementation of this class.
    `abstract boolean` | `isNamespaceAware()` Indicates whether or not this parser is configured to understand namespaces.
    `abstract boolean` | `isValidating()` Indicates whether or not this parser is configured to validate XML documents.
    `boolean` | `isXIncludeAware()` Get the XInclude processing mode for this parser.
    `void` | `parse(File f, DefaultHandler dh)` Parse the content of the file specified as XML using the specified `DefaultHandler`.
    `void` | `parse(File f, HandlerBase hb)` Parse the content of the file specified as XML using the specified `HandlerBase`.
    `void` | `parse(InputSource is, DefaultHandler dh)` Parse the content given `InputSource` as XML using the specified `DefaultHandler`.
    `void` | `parse(InputSource is, HandlerBase hb)` Parse the content given `InputSource` as XML using the specified `HandlerBase`.
    `void` | `parse(InputStream is, DefaultHandler dh)` Parse the content of the given `InputStream` instance as XML using the specified `DefaultHandler`.
    `void` | `parse(InputStream is, DefaultHandler dh, String systemId)` Parse the content of the given `InputStream` instance as XML using the specified `DefaultHandler`.
    `void` | `parse(InputStream is, HandlerBase hb)` Parse the content of the given `InputStream` instance as XML using the specified `HandlerBase`.
    `void` | `parse(InputStream is, HandlerBase hb, String systemId)` Parse the content of the given `InputStream` instance as XML using the specified `HandlerBase`.
    `void` | `parse(String uri, DefaultHandler dh)` Parse the content described by the giving Uniform Resource Identifier (URI) as XML using the specified `DefaultHandler`.
    `void` | `parse(String uri, HandlerBase hb)` Parse the content described by the giving Uniform Resource Identifier (URI) as XML using the specified `HandlerBase`.
    `void` | `reset()` Reset this `SAXParser` to its original configuration.
    `abstract void` | `setProperty(String name, Object value)` Sets the particular property in the underlying implementation of `XMLReader`.

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### SAXParser

          protected SAXParser()

      Protected constructor to prevent instaniation. Use `SAXParserFactory.newSAXParser()`.

  - ### Method Detail

    - #### reset

          public void reset()

      Reset this `SAXParser` to its original configuration.

      `SAXParser` is reset to the same state as when it was created with `SAXParserFactory.newSAXParser()`. `reset()` is designed to allow the reuse of existing `SAXParser`s thus saving resources associated with the creation of new `SAXParser`s.

      The reset `SAXParser` is not guaranteed to have the same `Schema` `Object`, e.g. `Object.equals(Object obj)`. It is guaranteed to have a functionally equal `Schema`.

      Throws:
        `UnsupportedOperationException` - When Implementations do not override this method
      Since:
        1.5

    - #### parse

          public void parse(InputStream is,
                            HandlerBase hb)
                     throws SAXException,
                            IOException

      Parse the content of the given `InputStream` instance as XML using the specified `HandlerBase`. Use of the DefaultHandler version of this method is recommended as the HandlerBase class has been deprecated in SAX 2.0.

      Parameters:
        `is` - InputStream containing the content to be parsed.
        `hb` - The SAX HandlerBase to use.
      Throws:
        `IllegalArgumentException` - If the given InputStream is null.
        `SAXException` - If parse produces a SAX error.
        `IOException` - If an IO error occurs interacting with the `InputStream`.
      See Also:
        `DocumentHandler`

    - #### parse

          public void parse(InputStream is,
                            HandlerBase hb,
                            String systemId)
                     throws SAXException,
                            IOException

      Parse the content of the given `InputStream` instance as XML using the specified `HandlerBase`. Use of the DefaultHandler version of this method is recommended as the HandlerBase class has been deprecated in SAX 2.0.

      Parameters:
        `is` - InputStream containing the content to be parsed.
        `hb` - The SAX HandlerBase to use.
        `systemId` - The systemId which is needed for resolving relative URIs.
      Throws:
        `IllegalArgumentException` - If the given `InputStream` is `null`.
        `IOException` - If any IO error occurs interacting with the `InputStream`.
        `SAXException` - If any SAX errors occur during processing.
      See Also:
        `version of this method instead.`

    - #### parse

          public void parse(InputStream is,
                            DefaultHandler dh)
                     throws SAXException,
                            IOException

      Parse the content of the given `InputStream` instance as XML using the specified `DefaultHandler`.
      Parameters:
        `is` - InputStream containing the content to be parsed.
        `dh` - The SAX DefaultHandler to use.
      Throws:
        `IllegalArgumentException` - If the given InputStream is null.
        `IOException` - If any IO errors occur.
        `SAXException` - If any SAX errors occur during processing.
      See Also:
        `DocumentHandler`

    - #### parse

          public void parse(InputStream is,
                            DefaultHandler dh,
                            String systemId)
                     throws SAXException,
                            IOException

      Parse the content of the given `InputStream` instance as XML using the specified `DefaultHandler`.
      Parameters:
        `is` - InputStream containing the content to be parsed.
        `dh` - The SAX DefaultHandler to use.
        `systemId` - The systemId which is needed for resolving relative URIs.
      Throws:
        `IllegalArgumentException` - If the given InputStream is null.
        `IOException` - If any IO errors occur.
        `SAXException` - If any SAX errors occur during processing.
      See Also:
        `version of this method instead.`

    - #### parse

          public void parse(String uri,
                            HandlerBase hb)
                     throws SAXException,
                            IOException

      Parse the content described by the giving Uniform Resource Identifier (URI) as XML using the specified `HandlerBase`. Use of the DefaultHandler version of this method is recommended as the `HandlerBase` class has been deprecated in SAX 2.0
      Parameters:
        `uri` - The location of the content to be parsed.
        `hb` - The SAX HandlerBase to use.
      Throws:
        `IllegalArgumentException` - If the uri is null.
        `IOException` - If any IO errors occur.
        `SAXException` - If any SAX errors occur during processing.
      See Also:
        `DocumentHandler`

    - #### parse

          public void parse(String uri,
                            DefaultHandler dh)
                     throws SAXException,
                            IOException

      Parse the content described by the giving Uniform Resource Identifier (URI) as XML using the specified `DefaultHandler`.
      Parameters:
        `uri` - The location of the content to be parsed.
        `dh` - The SAX DefaultHandler to use.
      Throws:
        `IllegalArgumentException` - If the uri is null.
        `IOException` - If any IO errors occur.
        `SAXException` - If any SAX errors occur during processing.
      See Also:
        `DocumentHandler`

    - #### parse

          public void parse(File f,
                            HandlerBase hb)
                     throws SAXException,
                            IOException

      Parse the content of the file specified as XML using the specified `HandlerBase`. Use of the DefaultHandler version of this method is recommended as the HandlerBase class has been deprecated in SAX 2.0
      Parameters:
        `f` - The file containing the XML to parse
        `hb` - The SAX HandlerBase to use.
      Throws:
        `IllegalArgumentException` - If the File object is null.
        `IOException` - If any IO errors occur.
        `SAXException` - If any SAX errors occur during processing.
      See Also:
        `DocumentHandler`

    - #### parse

          public void parse(File f,
                            DefaultHandler dh)
                     throws SAXException,
                            IOException

      Parse the content of the file specified as XML using the specified `DefaultHandler`.
      Parameters:
        `f` - The file containing the XML to parse
        `dh` - The SAX DefaultHandler to use.
      Throws:
        `IllegalArgumentException` - If the File object is null.
        `IOException` - If any IO errors occur.
        `SAXException` - If any SAX errors occur during processing.
      See Also:
        `DocumentHandler`

    - #### parse

          public void parse(InputSource is,
                            HandlerBase hb)
                     throws SAXException,
                            IOException

      Parse the content given `InputSource` as XML using the specified `HandlerBase`. Use of the DefaultHandler version of this method is recommended as the HandlerBase class has been deprecated in SAX 2.0
      Parameters:
        `is` - The InputSource containing the content to be parsed.
        `hb` - The SAX HandlerBase to use.
      Throws:
        `IllegalArgumentException` - If the `InputSource` object is `null`.
        `IOException` - If any IO errors occur.
        `SAXException` - If any SAX errors occur during processing.
      See Also:
        `DocumentHandler`

    - #### parse

          public void parse(InputSource is,
                            DefaultHandler dh)
                     throws SAXException,
                            IOException

      Parse the content given `InputSource` as XML using the specified `DefaultHandler`.
      Parameters:
        `is` - The InputSource containing the content to be parsed.
        `dh` - The SAX DefaultHandler to use.
      Throws:
        `IllegalArgumentException` - If the `InputSource` object is `null`.
        `IOException` - If any IO errors occur.
        `SAXException` - If any SAX errors occur during processing.
      See Also:
        `DocumentHandler`

    - #### getParser

          public abstract Parser getParser()
                                    throws SAXException

      Returns the SAX parser that is encapsultated by the implementation of this class.
      Returns:
        The SAX parser that is encapsultated by the implementation of this class.
      Throws:
        `SAXException` - If any SAX errors occur during processing.

    - #### getXMLReader

          public abstract XMLReader getXMLReader()
                                          throws SAXException

      Returns the `XMLReader` that is encapsulated by the implementation of this class.
      Returns:
        The XMLReader that is encapsulated by the implementation of this class.
      Throws:
        `SAXException` - If any SAX errors occur during processing.

    - #### isNamespaceAware

          public abstract boolean isNamespaceAware()

      Indicates whether or not this parser is configured to understand namespaces.
      Returns:
        true if this parser is configured to understand namespaces; false otherwise.

    - #### isValidating

          public abstract boolean isValidating()

      Indicates whether or not this parser is configured to validate XML documents.
      Returns:
        true if this parser is configured to validate XML documents; false otherwise.

    - #### setProperty

          public abstract void setProperty(String name,
                                           Object value)
                                    throws SAXNotRecognizedException,
                                           SAXNotSupportedException

      Sets the particular property in the underlying implementation of `XMLReader`. A list of the core features and properties can be found at http://sax.sourceforge.net/?selected=get-set.

      All implementations that implement JAXP 1.5 or newer are required to support the `XMLConstants.ACCESS_EXTERNAL_DTD` and `XMLConstants.ACCESS_EXTERNAL_SCHEMA` properties.

      - Setting the `XMLConstants.ACCESS_EXTERNAL_DTD` property restricts the access to external DTDs, external Entity References to the protocols specified by the property. If access is denied during parsing due to the restriction of this property, `SAXException` will be thrown by the parse methods defined by `SAXParser`.

        Setting the `XMLConstants.ACCESS_EXTERNAL_SCHEMA` property restricts the access to external Schema set by the schemaLocation attribute to the protocols specified by the property. If access is denied during parsing due to the restriction of this property, `SAXException` will be thrown by the parse methods defined by the `SAXParser`.

      Parameters:
        `name` - The name of the property to be set.
        `value` - The value of the property to be set.
      Throws:
        `SAXNotRecognizedException` - When the underlying XMLReader does not recognize the property name.
        `SAXNotSupportedException` - When the underlying XMLReader recognizes the property name but doesn't support the property.
      See Also:
        `XMLReader.setProperty(java.lang.String, java.lang.Object)`

    - #### getProperty

          public abstract Object getProperty(String name)
                                      throws SAXNotRecognizedException,
                                             SAXNotSupportedException

      Returns the particular property requested for in the underlying implementation of `XMLReader`.

      Parameters:
        `name` - The name of the property to be retrieved.
      Returns:
        Value of the requested property.
      Throws:
        `SAXNotRecognizedException` - When the underlying XMLReader does not recognize the property name.
        `SAXNotSupportedException` - When the underlying XMLReader recognizes the property name but doesn't support the property.
      See Also:
        `XMLReader.getProperty(java.lang.String)`

    - #### getSchema

          public Schema getSchema()

      Get a reference to the the `Schema` being used by the XML processor.

      If no schema is being used, `null` is returned.

      Returns:
        `Schema` being used or `null` if none in use
      Throws:
        `UnsupportedOperationException` - When implementation does not override this method
      Since:
        1.5

    - #### isXIncludeAware

          public boolean isXIncludeAware()

      Get the XInclude processing mode for this parser.

      Returns:
        the return value of the `SAXParserFactory.isXIncludeAware()` when this parser was created from factory.
      Throws:
        `UnsupportedOperationException` - When implementation does not override this method
      Since:
        1.5
      See Also:
        `SAXParserFactory.setXIncludeAware(boolean)`

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