org.eclipse.rdf4j.rio.ntriples

## Class NTriplesParser

- java.lang.Object
- - org.eclipse.rdf4j.rio.helpers.AbstractRDFParser
  - - org.eclipse.rdf4j.rio.ntriples.NTriplesParser

- All Implemented Interfaces:
    RDFParser
  Direct Known Subclasses:
    NQuadsParser

      public class NTriplesParser
      extends AbstractRDFParser

  RDF parser for N-Triples files. A specification of NTriples can be found in this section of the RDF Test Cases document. This parser is not thread-safe, therefore its public methods are synchronized.
  Author:
    Arjohn Kampman

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.eclipse.rdf4j.rio.RDFParser

      `RDFParser.DatatypeHandling`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected int` | `currentIndex`
    `protected char[]` | `lineChars`
    `protected long` | `lineNo`
    `protected Value` | `object`
    `protected IRI` | `predicate`
    `protected BufferedReader` | `reader`
    `protected Resource` | `subject`

    - ### Fields inherited from class org.eclipse.rdf4j.rio.helpers.AbstractRDFParser

      `rdfHandler, valueFactory`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `NTriplesParser()` Creates a new NTriplesParser that will use a `SimpleValueFactory` to create object for resources, bNodes and literals.
    `NTriplesParser(ValueFactory valueFactory)` Creates a new NTriplesParser that will use the supplied `ValueFactory` to create RDF model objects.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected void` | `assertLineTerminates()` Verifies that there is only whitespace or comments until the end of the line.
    `protected void` | `clear()` Clears any information that has been collected while parsing.
    `protected IRI` | `createURI(String uri)` Creates a `IRI` object for the specified URI-string.
    `RDFFormat` | `getRDFFormat()` Gets the RDF format that this parser can parse.
    `Collection<RioSetting<?>>` | `getSupportedSettings()`
    `protected void` | `handleStatement(boolean ignoredAnError)`
    `void` | `parse(InputStream in, String baseURI)` Parses the data from the supplied InputStream, using the supplied baseURI to resolve any relative URI references.
    `void` | `parse(Reader reader, String baseURI)` Parses the data from the supplied Reader, using the supplied baseURI to resolve any relative URI references.
    `protected IRI` | `parseIRI()`
    `protected Resource` | `parseNode()`
    `protected void` | `parseObject()`
    `protected void` | `parsePredicate()`
    `protected void` | `parseStatement()`
    `protected void` | `parseSubject()`
    `protected void` | `reportError(Exception e, RioSetting<Boolean> setting)` Reports an error with associated line- and column number to the registered ParseErrorListener, if the given setting has been set to true.
    `protected void` | `reportError(String msg, RioSetting<Boolean> setting)` Overrides `AbstractRDFParser.reportError(String, RioSetting)`, adding line number information to the error.
    `protected void` | `reportFatalError(Exception e)` Overrides `AbstractRDFParser.reportFatalError(Exception)`, adding line number information to the error.
    `protected void` | `reportFatalError(String msg)` Overrides `AbstractRDFParser.reportFatalError(String)`, adding line number information to the error.
    `protected void` | `reportWarning(String msg)` Overrides `AbstractRDFParser.reportWarning(String)`, adding line number information to the error.
    `protected boolean` | `shouldParseLine()`
    `protected void` | `skipWhitespace(boolean throwEOF)`
    `protected void` | `throwEOFException()`

    - ### Methods inherited from class org.eclipse.rdf4j.rio.helpers.AbstractRDFParser

      `clearBNodeIDMap, createBNode, createBNode, createLiteral, createLiteral, createNode, createNode, createStatement, createStatement, datatypeHandling, getNamespace, getParseErrorListener, getParseLocationListener, getParserConfig, getRDFHandler, initializeNamespaceTableFromConfiguration, preserveBNodeIDs, reportError, reportError, reportError, reportFatalError, reportFatalError, reportFatalError, reportLocation, reportWarning, resolveURI, set, setBaseURI, setBaseURI, setDatatypeHandling, setNamespace, setParseErrorListener, setParseLocationListener, setParserConfig, setPreserveBNodeIDs, setRDFHandler, setStopAtFirstError, setValueFactory, setVerifyData, stopAtFirstError, verifyData`

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

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

    - ### Methods inherited from interface org.eclipse.rdf4j.rio.RDFParser

      `parse, parse`

- - ### Field Detail

    - #### reader

          protected BufferedReader reader

    - #### lineChars

          protected char[] lineChars

    - #### currentIndex

          protected int currentIndex

    - #### lineNo

          protected long lineNo

    - #### subject

          protected Resource subject

    - #### predicate

          protected IRI predicate

    - #### object

          protected Value object

  - ### Constructor Detail

    - #### NTriplesParser

          public NTriplesParser()

      Creates a new NTriplesParser that will use a `SimpleValueFactory` to create object for resources, bNodes and literals.

    - #### NTriplesParser

          public NTriplesParser(ValueFactory valueFactory)

      Creates a new NTriplesParser that will use the supplied `ValueFactory` to create RDF model objects.
      Parameters:
        `valueFactory` - A ValueFactory.

  - ### Method Detail

    - #### getRDFFormat

          public RDFFormat getRDFFormat()

      Description copied from interface: `RDFParser`
      Gets the RDF format that this parser can parse.

    - #### parse

          public void parse(InputStream in,
                            String baseURI)
                     throws IOException,
                            RDFParseException,
                            RDFHandlerException

      Description copied from interface: `RDFParser`
      Parses the data from the supplied InputStream, using the supplied baseURI to resolve any relative URI references.
      Parameters:
        `in` - The InputStream from which to read the data.
        `baseURI` - The URI associated with the data in the InputStream. May be `null`. Parsers for syntax formats that do not support relative URIs will ignore this argument.

        Note that if the data contains an embedded base URI, that embedded base URI will overrule the value supplied here (see RFC 3986 section 5.1 for details).

      Throws:
        `IOException` - If an I/O error occurred while data was read from the InputStream.
        `RDFParseException` - If the parser has found an unrecoverable parse error.
        `RDFHandlerException` - If the configured statement handler has encountered an unrecoverable error.

    - #### parse

          public void parse(Reader reader,
                            String baseURI)
                     throws IOException,
                            RDFParseException,
                            RDFHandlerException

      Description copied from interface: `RDFParser`
      Parses the data from the supplied Reader, using the supplied baseURI to resolve any relative URI references.
      Parameters:
        `reader` - The Reader from which to read the data.
        `baseURI` - The URI associated with the data in the InputStream. May be `null`. Parsers for syntax formats that do not support relative URIs will ignore this argument.

        Note that if the data contains an embedded base URI, that embedded base URI will overrule the value supplied here (see RFC 3986 section 5.1 for details).

      Throws:
        `IOException` - If an I/O error occurred while data was read from the InputStream.
        `RDFParseException` - If the parser has found an unrecoverable parse error.
        `RDFHandlerException` - If the configured statement handler has encountered an unrecoverable error.

    - #### parseStatement

          protected void parseStatement()
                                 throws RDFParseException,
                                        RDFHandlerException

      Throws:
        `RDFParseException`
        `RDFHandlerException`

    - #### skipWhitespace

          protected void skipWhitespace(boolean throwEOF)

    - #### shouldParseLine

          protected boolean shouldParseLine()

    - #### parseSubject

          protected void parseSubject()

    - #### parsePredicate

          protected void parsePredicate()

    - #### parseObject

          protected void parseObject()

    - #### assertLineTerminates

          protected void assertLineTerminates()
                                       throws RDFParseException

      Verifies that there is only whitespace or comments until the end of the line.
      Throws:
        `RDFParseException`

    - #### handleStatement

          protected void handleStatement(boolean ignoredAnError)

    - #### parseIRI

          protected IRI parseIRI()

    - #### parseNode

          protected Resource parseNode()

    - #### createURI

          protected IRI createURI(String uri)
                           throws RDFParseException

      Description copied from class: `AbstractRDFParser`
      Creates a `IRI` object for the specified URI-string.
      Overrides:
        `createURI` in class `AbstractRDFParser`
      Throws:
        `RDFParseException`

    - #### reportWarning

          protected void reportWarning(String msg)

      Overrides `AbstractRDFParser.reportWarning(String)`, adding line number information to the error.
      Overrides:
        `reportWarning` in class `AbstractRDFParser`

    - #### reportError

          protected void reportError(String msg,
                                     RioSetting<Boolean> setting)
                              throws RDFParseException

      Overrides `AbstractRDFParser.reportError(String, RioSetting)`, adding line number information to the error.
      Overrides:
        `reportError` in class `AbstractRDFParser`
      Parameters:
        `msg` - The message to use for `ParseErrorListener.error(String, long, long)` and for `RDFParseException.RDFParseException(String, long, long)` .
        `setting` - The boolean setting that will be checked to determine if this is an issue that we need to look at at all. If this setting is true, then the error listener will receive the error, and if `ParserConfig.isNonFatalError(RioSetting)` returns true an exception will be thrown.
      Throws:
        `RDFParseException` - If `RioConfig.get(RioSetting)` returns true, and `ParserConfig.isNonFatalError(RioSetting)` returns true for the given setting.

    - #### reportError

          protected void reportError(Exception e,
                                     RioSetting<Boolean> setting)
                              throws RDFParseException

      Description copied from class: `AbstractRDFParser`
      Reports an error with associated line- and column number to the registered ParseErrorListener, if the given setting has been set to true.

      This method also throws an `RDFParseException` when the given setting has been set to `true` and it is not a nonFatalError.

      Overrides:
        `reportError` in class `AbstractRDFParser`
      Parameters:
        `e` - The exception whose message will be used for `ParseErrorListener.error(String, long, long)` and for `RDFParseException.RDFParseException(String, long, long)` .
        `setting` - The boolean setting that will be checked to determine if this is an issue that we need to look at at all. If this setting is true, then the error listener will receive the error, and if `ParserConfig.isNonFatalError(RioSetting)` returns true an exception will be thrown.
      Throws:
        `RDFParseException` - If `RioConfig.get(RioSetting)` returns true, and `ParserConfig.isNonFatalError(RioSetting)` returns true for the given setting.

    - #### reportFatalError

          protected void reportFatalError(String msg)
                                   throws RDFParseException

      Overrides `AbstractRDFParser.reportFatalError(String)`, adding line number information to the error.
      Overrides:
        `reportFatalError` in class `AbstractRDFParser`
      Throws:
        `RDFParseException`

    - #### reportFatalError

          protected void reportFatalError(Exception e)
                                   throws RDFParseException

      Overrides `AbstractRDFParser.reportFatalError(Exception)`, adding line number information to the error.
      Overrides:
        `reportFatalError` in class `AbstractRDFParser`
      Throws:
        `RDFParseException`

    - #### throwEOFException

          protected void throwEOFException()
                                    throws RDFParseException

      Throws:
        `RDFParseException`

    - #### clear

          protected void clear()

      Description copied from class: `AbstractRDFParser`
      Clears any information that has been collected while parsing. This method must be called by subclasses when finishing the parse process.
      Overrides:
        `clear` in class `AbstractRDFParser`

    - #### getSupportedSettings

          public Collection<RioSetting<?>> getSupportedSettings()

      Specified by:
        `getSupportedSettings` in interface `RDFParser`
      Overrides:
        `getSupportedSettings` in class `AbstractRDFParser`
      Returns:
        A collection of `RioSetting`s that are supported by this RDFParser.

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