org.apache.xalan.transformer
Class TransformSnapshotImpl

java.lang.Object
  org.apache.xalan.transformer.TransformSnapshotImpl

All Implemented Interfaces:

TransformSnapshot

class TransformSnapshotImpl

extends Object

implements TransformSnapshot

This class holds a "snapshot" of it's current transformer state, which can later be restored. This only saves state which can change over the course of the side-effect-free (i.e. no extensions that call setURIResolver, etc.).

Field Summary

private Stack	m_attrSetStack Stack for the purposes of flagging infinite recursion with attribute sets.
private Stack	m_axesIteratorStack Stack of AxesIterators.
private DTMIterator	m_contextNodeList The current context node list.
private Stack	m_contextNodeLists The current context node lists stack.
private CountersTable	m_countersTable The table of counters for xsl:number support.
private IntStack	m_currentExpressionNodes A stack of the current sub-expression nodes.
private NodeVector	m_currentMatchNodes A node vector used as a stack to track the current ElemTemplate that was matched, as well as the node that was matched.
private Stack	m_currentMatchTemplates A node vector used as a stack to track the current ElemTemplate that was matched, as well as the node that was matched.
private IntStack	m_currentNodes The stack of current node objects.
private ObjectStack	m_currentTemplateElements A node vector used as a stack to track the current ElemTemplateElement.
private BoolStack	m_currentTemplateRuleIsNull Is > 0 when we're processing a for-each.
(package private) int	m_eventCount The number of events queued
(package private) boolean	m_nsContextPushed Indicate whether a namespace context was pushed
private org.xml.sax.helpers.NamespaceSupport	m_nsSupport Use the SAX2 helper class to track result namespaces.
private VariableStack	m_variableStacks The stack of Variable stack frames.

Constructor Summary

(package private)

TransformSnapshotImpl(TransformerImpl transformer) Constructor TransformSnapshotImpl Take a snapshot of the currently executing context.

Method Summary

(package private) void

apply(TransformerImpl transformer) This will reset the stylesheet to a given execution context based on some previously taken snapshot where we can then start execution

Methods inherited from class java.lang.Object

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

Field Detail

m_variableStacks

private VariableStack m_variableStacks

The stack of Variable stack frames.

m_currentNodes

private IntStack m_currentNodes

The stack of current node objects. Not to be confused with the current node list.

m_currentExpressionNodes

private IntStack m_currentExpressionNodes

A stack of the current sub-expression nodes.

m_contextNodeLists

private Stack m_contextNodeLists

The current context node lists stack.

m_contextNodeList

private DTMIterator m_contextNodeList

The current context node list.

m_axesIteratorStack

private Stack m_axesIteratorStack

Stack of AxesIterators.

m_currentTemplateRuleIsNull

private BoolStack m_currentTemplateRuleIsNull

Is > 0 when we're processing a for-each.

m_currentTemplateElements

private ObjectStack m_currentTemplateElements

A node vector used as a stack to track the current ElemTemplateElement. Needed for the org.apache.xalan.transformer.TransformState interface, so a tool can discover the calling template.

m_currentMatchTemplates

private Stack m_currentMatchTemplates

A node vector used as a stack to track the current ElemTemplate that was matched, as well as the node that was matched. Needed for the org.apache.xalan.transformer.TransformState interface, so a tool can discover the matched template, and matched node.

m_currentMatchNodes

private NodeVector m_currentMatchNodes

A node vector used as a stack to track the current ElemTemplate that was matched, as well as the node that was matched. Needed for the org.apache.xalan.transformer.TransformState interface, so a tool can discover the matched template, and matched node.

m_countersTable

private CountersTable m_countersTable

The table of counters for xsl:number support.

See Also:

ElemNumber

m_attrSetStack

private Stack m_attrSetStack

Stack for the purposes of flagging infinite recursion with attribute sets.

m_nsContextPushed

boolean m_nsContextPushed

Indicate whether a namespace context was pushed

m_nsSupport

private org.xml.sax.helpers.NamespaceSupport m_nsSupport

Use the SAX2 helper class to track result namespaces.

m_eventCount

int m_eventCount

The number of events queued

Constructor Detail

TransformSnapshotImpl

TransformSnapshotImpl(TransformerImpl transformer)

Constructor TransformSnapshotImpl Take a snapshot of the currently executing context.

Parameters:

transformer - Non null transformer instance

Method Detail

apply

void apply(TransformerImpl transformer)

This will reset the stylesheet to a given execution context based on some previously taken snapshot where we can then start execution

Parameters:

transformer - Non null transformer instance