net.sf.saxon.instruct
Class Block

java.lang.Object
  net.sf.saxon.instruct.Instruction
      net.sf.saxon.instruct.Block

All Implemented Interfaces:

Serializable, SourceLocator

public class Block
extends Instruction

Implements an imaginary xsl:block instruction which simply evaluates its contents. Used for top-level templates, xsl:otherwise, etc.

See Also:

Serialized Form

Field Summary

static byte	BLOCK General-purpose block
static byte	FALLBACK Block representing an xsl:fallback instruction
static byte	IF Block representing the body of an xsl:if
static byte	MATCHING_SUBSTRING Block representing an xsl:matching-substring instruction
static byte	NON_MATCHING_SUBSTRING Block representing an xsl:non-matching-substring instruction
static byte	OTHERWISE Block representing an xsl:otherwise instruction
static byte	WHEN Block representing the body of an xsl:when

Fields inherited from class net.sf.saxon.instruct.Instruction

children

Constructor Summary

Block()

Method Summary

TailCall	processLeavingTail(XPathContext context) ProcessLeavingTail: called to do the real work of this instruction.
void	setInstructionDetails(Controller controller, NamePool namePool, InstructionDetails details) Get the name of the instruction for use in diagnostics
void	setInstructionName(byte instructionNameCode)

Methods inherited from class net.sf.saxon.instruct.Instruction

assembleParams, assembleTunnelParams, getChildren, getColumnNumber, getInstructionDetails, getInstructionName, getLineNumber, getPublicId, getResultType, getSystemId, getSystemId, process, processChildren, processChildrenLeavingTail, recoverableError, setChildren, setSourceLocation, styleError, styleError

Methods inherited from class java.lang.Object

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

Field Detail

BLOCK

public static final byte BLOCK

General-purpose block

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Constant Field Values

OTHERWISE

public static final byte OTHERWISE

Block representing an xsl:otherwise instruction

See Also:

Constant Field Values

FALLBACK

public static final byte FALLBACK

Block representing an xsl:fallback instruction

See Also:

Constant Field Values

MATCHING_SUBSTRING

public static final byte MATCHING_SUBSTRING

Block representing an xsl:matching-substring instruction

See Also:

Constant Field Values

NON_MATCHING_SUBSTRING

public static final byte NON_MATCHING_SUBSTRING

Block representing an xsl:non-matching-substring instruction

See Also:

Constant Field Values

IF

public static final byte IF

Block representing the body of an xsl:if

See Also:

Constant Field Values

WHEN

public static final byte WHEN

Block representing the body of an xsl:when

See Also:

Constant Field Values

Constructor Detail

Block

public Block()

Method Detail

setInstructionName

public void setInstructionName(byte instructionNameCode)

setInstructionDetails

public void setInstructionDetails(Controller controller,
                                  NamePool namePool,
                                  InstructionDetails details)

Description copied from class: Instruction

Get the name of the instruction for use in diagnostics

Specified by:

setInstructionDetails in class Instruction

processLeavingTail

public TailCall processLeavingTail(XPathContext context)
                            throws TransformerException

Description copied from class: Instruction

ProcessLeavingTail: called to do the real work of this instruction. This method must be implemented in each subclass. The results of the instruction are written to the current Receiver, which can be obtained via the Controller.

Specified by:

processLeavingTail in class Instruction

Parameters:

context - The dynamic context of the transformation, giving access to the current node, the current variables, etc.

Returns:

null if the instruction has completed execution; or a TailCall indicating a function call or template call that is delegated to the caller, to be made after the stack has been unwound so as to save stack space.

Throws:

TransformerException