net.sf.saxon.query

Class QueryReader

public class QueryReader extends Object

This class contains static methods used to read a query as a byte stream, infer the encoding if necessary, and return the text of the query as a string; also methods to import functions and variables from one module into another, and check their consistency.
Method Summary
static StringreadEncoding(InputStream is)
Read an input stream non-destructively to determine the encoding from the Query Prolog
static StringreadInputStream(InputStream is, String encoding, NameChecker nameChecker)
Read a query from an InputStream.
static StringreadSourceQuery(StreamSource ss, NameChecker nameChecker)
Read a query module given a StreamSource

Method Detail

readEncoding

public static String readEncoding(InputStream is)
Read an input stream non-destructively to determine the encoding from the Query Prolog

Parameters: is the input stream: this must satisfy the precondition is.markSupported() = true.

Returns: the encoding to be used: defaults to UTF-8 if no encoding was specified explicitly in the query prolog

Throws: XPathException if the input stream cannot be read

readInputStream

public static String readInputStream(InputStream is, String encoding, NameChecker nameChecker)
Read a query from an InputStream. The method checks that all characters are valid XML characters, and also performs normalization of line endings.

Parameters: is the input stream encoding the encoding, or null if the encoding is unknown nameChecker the nameChecker to be used for checking characters

Returns: the content of the InputStream as a string

readSourceQuery

public static String readSourceQuery(StreamSource ss, NameChecker nameChecker)
Read a query module given a StreamSource

Parameters: ss the supplied StreamSource. This must contain a non-null systemID which defines the base URI of the query module, and either an InputStream or a Reader containing the query text. In the case of an InputStream the method attempts to infer the encoding; in the case of a Reader, this has already been done, and the encoding specified within the query itself is ignored.

The method reads from the InputStream or Reader contained in the StreamSource up to the end of file unless a fatal error occurs. It does not close the InputStream or Reader; this is the caller's responsibility.

nameChecker this checks XML names against either the XML 1.0 or XML 1.1 rules

Returns: the text of the query