org.parboiled.matchers

Class AbstractMatcher

java.lang.Object

org.parboiled.trees.ImmutableGraphNode<Matcher>

org.parboiled.matchers.AbstractMatcher

All Implemented Interfaces:

java.lang.Cloneable, Matcher, Rule, GraphNode<Matcher>

Direct Known Subclasses:

ActionMatcher, AnyMatcher, AnyOfMatcher, CharIgnoreCaseMatcher, CharMatcher, CharRangeMatcher, CustomMatcher, EmptyMatcher, FirstOfMatcher, NothingMatcher, OneOrMoreMatcher, OptionalMatcher, SequenceMatcher, TestMatcher, TestNotMatcher, ZeroOrMoreMatcher

public abstract class AbstractMatcher
extends ImmutableGraphNode<Matcher>
implements Matcher, java.lang.Cloneable

Abstract base class of most regular Matchers.

Constructor Summary

Constructors

Constructor and Description
AbstractMatcher(Rule[] subRules, java.lang.String label)
AbstractMatcher(Rule subRule, java.lang.String label)
AbstractMatcher(java.lang.String label)

Method Summary

Modifier and Type	Method and Description
boolean	areMismatchesMemoed()
boolean	areSubnodesSuppressed()
java.lang.String	getLabel()
MatcherContext	getSubContext(MatcherContext context) Creates a context for the matching of this matcher using the given parent context.
java.lang.Object	getTag() Retrieves a previously set tag object.
boolean	hasCustomLabel()
boolean	isNodeSkipped()
boolean	isNodeSuppressed()
AbstractMatcher	label(java.lang.String label) Attaches a label to this Rule.
Rule	memoMismatches() Enables memoization of rule mismatches for consecutive rule applications at the same input location.
void	setTag(java.lang.Object tagObject) Associates an arbitrary object with this matcher.
Rule	skipNode() Instructs parboiled to not create a parse tree node for this rule.
Rule	suppressNode() Instructs parboiled to not create a parse tree node for this rule and all subrules, which can significantly increase parsing performance.
Rule	suppressSubnodes() Instructs parboiled to not create parse tree nodes for the subrules of this rule, which can significantly increase parsing performance.
java.lang.String	toString()

Methods inherited from class org.parboiled.trees.ImmutableGraphNode

getChildren

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.parboiled.matchers.Matcher

accept, match

Methods inherited from interface org.parboiled.trees.GraphNode

getChildren

Constructor Detail

AbstractMatcher

public AbstractMatcher(java.lang.String label)

AbstractMatcher

public AbstractMatcher(Rule subRule,
                       java.lang.String label)

AbstractMatcher

public AbstractMatcher(Rule[] subRules,
                       java.lang.String label)

Method Detail

isNodeSuppressed

public boolean isNodeSuppressed()

Specified by:

isNodeSuppressed in interface Matcher

Returns:

true if this matcher has been marked with @SuppressNode

areSubnodesSuppressed

public boolean areSubnodesSuppressed()

Specified by:

areSubnodesSuppressed in interface Matcher

Returns:

true if this matcher has been marked with @SuppressSubnodes

isNodeSkipped

public boolean isNodeSkipped()

Specified by:

isNodeSkipped in interface Matcher

Returns:

true if this matcher has been marked with @SkipNode

areMismatchesMemoed

public boolean areMismatchesMemoed()

Specified by:

areMismatchesMemoed in interface Matcher

Returns:

true if this matcher has been marked with @MemoMismatches

getLabel

public java.lang.String getLabel()

Specified by:

getLabel in interface Matcher

Returns:

the label of the matcher (which is identical to the label of the Rule this matcher matches)

hasCustomLabel

public boolean hasCustomLabel()

Specified by:

hasCustomLabel in interface Matcher

Returns:

true if this matcher has been assigned a custom label

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

label

public AbstractMatcher label(java.lang.String label)

Description copied from interface: Rule

Attaches a label to this Rule. Corresponds to the @Label annotation.

Specified by:

label in interface Rule

Parameters:

label - the label

Returns:

this Rule

suppressNode

public Rule suppressNode()

Description copied from interface: Rule

Instructs parboiled to not create a parse tree node for this rule and all subrules, which can significantly increase parsing performance. Corresponds to the @SuppressNode annotation.

Specified by:

suppressNode in interface Rule

Returns:

this Rule

suppressSubnodes

public Rule suppressSubnodes()

Description copied from interface: Rule

Instructs parboiled to not create parse tree nodes for the subrules of this rule, which can significantly increase parsing performance. Corresponds to the @SuppressSubnodes annotation.

Specified by:

suppressSubnodes in interface Rule

Returns:

this Rule

skipNode

public Rule skipNode()

Description copied from interface: Rule

Instructs parboiled to not create a parse tree node for this rule. The parse tree nodes of all subrules are directly attached to the parent of this rule (or more correctly: the first ancestor not having been marked skipNode(). Note that, even though a rule marked as skipNode() does not create a parse tree node of its own and is therefore "invisible" in the parse tree, the rule still exists as a regular rule in the rule tree and is accompanied by a "regular" rule Context during rule matching. Corresponds to the @SkipNode annotation.

Specified by:

skipNode in interface Rule

Returns:

this Rule

memoMismatches

public Rule memoMismatches()

Description copied from interface: Rule

Enables memoization of rule mismatches for consecutive rule applications at the same input location.

Specified by:

memoMismatches in interface Rule

Returns:

this rule

getTag

public java.lang.Object getTag()

Description copied from interface: Matcher

Retrieves a previously set tag object.

Specified by:

getTag in interface Matcher

Returns:

the tag object or null if none set

setTag

public void setTag(java.lang.Object tagObject)

Description copied from interface: Matcher

Associates an arbitrary object with this matcher. Used for example during profiling and packrat parsing. The matcher implementations themselves completely ignore the contents of this property. It purely serves as a performance optimization for ParseRunners and/or MatchHandlers and saves these from the need to use Map<Matcher, XYZ> structures for associating internal objects with matchers.

Specified by:

setTag in interface Matcher

Parameters:

tagObject - the tag object

getSubContext

public MatcherContext getSubContext(MatcherContext context)

Description copied from interface: Matcher

Creates a context for the matching of this matcher using the given parent context.

Specified by:

getSubContext in interface Matcher

Parameters:

context - the parent context

Returns:

the context this matcher is to be run in