Package nl.basjes.parse.useragent.analyze.treewalker.steps.value

Class StepConcatPrefix

java.lang.Object

nl.basjes.parse.useragent.analyze.treewalker.steps.Step

nl.basjes.parse.useragent.analyze.treewalker.steps.value.StepConcatPrefix

All Implemented Interfaces:

Serializable

public class StepConcatPrefix
extends Step

See Also:

• Serialized Form

Field Summary

Fields inherited from class nl.basjes.parse.useragent.analyze.treewalker.steps.Step

LOG, logprefix, verbose

Constructor Summary

Constructors

Constructor	Description
StepConcatPrefix(String prefix)

Method Summary

Modifier and Type	Method	Description
boolean	canFail()	Some steps cannot fail.
String	toString()
WalkList.WalkResult	walk(org.antlr.v4.runtime.tree.ParseTree tree, String value)	This will walk into the tree and recurse through all the remaining steps.

Methods inherited from class nl.basjes.parse.useragent.analyze.treewalker.steps.Step

destroy, getActualValue, getNextStep, mustHaveInput, setNextStep, setVerbose, treeIsSeparator, up, walkNextStep

Methods inherited from class java.lang.Object

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

Constructor Details

StepConcatPrefix

public StepConcatPrefix(String prefix)

Method Details

walk

public WalkList.WalkResult walk(@Nonnull
 org.antlr.v4.runtime.tree.ParseTree tree,
 @Nullable
 String value)

Description copied from class: Step

This will walk into the tree and recurse through all the remaining steps. This must iterate of all possibilities and return the first matching result.

Specified by:

walk in class Step

Parameters:

tree - The tree to walk into.

value - The string representation of the previous step (needed for compare and lookup operations). The null value means to use the implicit 'full' value (i.e. getSourceText(tree) )

Returns:

Either null or the actual value that was found.

canFail

public boolean canFail()

Description copied from class: Step

Some steps cannot fail. For a require rule if the last step cannot fail then this can be removed from the require list to improve performance at run time.

Overrides:

canFail in class Step

Returns:

If this specific step can or cannot fail.

toString

public String toString()

Overrides:

toString in class Object