com.northconcepts.datapipeline.foundations.pipeline.tree.detect

Class CollapseSiblingPatterns

java.lang.Object

com.northconcepts.datapipeline.foundations.pipeline.tree.detect.TreeTransformer

com.northconcepts.datapipeline.foundations.pipeline.tree.detect.CollapseSiblingPatterns

public class CollapseSiblingPatterns
extends TreeTransformer

Collapses down (merges) sibling tree-node-paths whose names share a derivable naming/wildcard pattern (see SiblingSetRule) into a single wildcard node, mirroring what the build-time NodeNameRules produce for individually dynamic names: the collapsed node is named *, its XPath expression ends in node(), member names become its values, and descendant XPaths collapse the merged segment to *.

Opt-in — insert it before the detection passes with TreeDetectionStrategy.enableSiblingPatternCollapse(), ideally together with standard(true) so wildcard post-processing (leftover-sibling merging and synthetic value fields for childless nodes) applies to the collapsed node too. One pattern is collapsed per parent: rules are consulted in order and the first rule to derive a pattern wins, so rule order sets precedence (within AffixSiblingSetRule, competing name buckets are tried largest first).

Constructor Summary

Constructors

Constructor and Description
CollapseSiblingPatterns()

Method Summary

Modifier and Type	Method and Description
CollapseSiblingPatterns	addRule(SiblingSetRule rule)
CollapseSiblingPatterns	clearRules()
protected void	collapseChildren(TreeNode parent)
protected List<TreeNode>	getCandidateSiblings(TreeNode parent) Returns the children eligible for pattern derivation: named element/field nodes, excluding attributes, existing wildcards, JSON container nodes, and nodes without an XPath expression.
List<SiblingSetRule>	getRules()
void	transform(Tree tree)

Methods inherited from class com.northconcepts.datapipeline.foundations.pipeline.tree.detect.TreeTransformer

merge, mergeChildren

Methods inherited from class java.lang.Object

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

Constructor Detail

CollapseSiblingPatterns

public CollapseSiblingPatterns()

Method Detail

getRules

public List<SiblingSetRule> getRules()

addRule

public CollapseSiblingPatterns addRule(SiblingSetRule rule)

clearRules

public CollapseSiblingPatterns clearRules()

transform

public void transform(Tree tree)

Specified by:

transform in class TreeTransformer

collapseChildren

protected void collapseChildren(TreeNode parent)

getCandidateSiblings

protected List<TreeNode> getCandidateSiblings(TreeNode parent)

Returns the children eligible for pattern derivation: named element/field nodes, excluding attributes, existing wildcards, JSON container nodes, and nodes without an XPath expression.