com.goldencode.trpl

Class Driver

java.lang.Object

java.lang.Thread

com.goldencode.trpl.Driver

All Implemented Interfaces:

java.lang.Runnable

public class Driver
extends java.lang.Thread

Implements the core logic for a tree processing thread.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field and Description
private BaseState	base State shared by all callbacks (across multiple different trees).
private java.util.concurrent.CountDownLatch	latch Mechanism to notify the main engine thread of completion.
private static ConversionStatus	LOG Logger
private AstManager	mgr Provides core AST services.
private Pipeline	pipeline Callbacks to execute based on the events of the tree walk.
private java.util.concurrent.ConcurrentLinkedQueue<java.lang.String>	queue Queue from which to obtain the next tree name to process.

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
Driver(java.util.concurrent.ConcurrentLinkedQueue<java.lang.String> queue, Pipeline pipeline, BaseState base, java.util.concurrent.CountDownLatch latch) Construct a driver thread instance.

Method Summary

Modifier and Type	Method and Description
private WalkState	prepareState(Resolver resolver, Aast here) Setup the resolver and walk state for the walk of a tree at the beginning of a walk element in the pipeline.
void	run() Execute the core logic of the thread.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final ConversionStatus LOG

Logger

queue

private final java.util.concurrent.ConcurrentLinkedQueue<java.lang.String> queue

Queue from which to obtain the next tree name to process.

pipeline

private final Pipeline pipeline

Callbacks to execute based on the events of the tree walk.

base

private final BaseState base

State shared by all callbacks (across multiple different trees).

latch

private final java.util.concurrent.CountDownLatch latch

Mechanism to notify the main engine thread of completion.

mgr

private final AstManager mgr

Provides core AST services.

Constructor Detail

Driver

public Driver(java.util.concurrent.ConcurrentLinkedQueue<java.lang.String> queue,
              Pipeline pipeline,
              BaseState base,
              java.util.concurrent.CountDownLatch latch)

Construct a driver thread instance.

Parameters:

queue - Queue from which to obtain the next tree name to process.

pipeline - Callbacks to execute based on the events of the tree walk.

base - Common state shared with all callbacks.

latch - Mechanism to notify the main engine thread of completion.

Method Detail

run

public void run()

Execute the core logic of the thread. This is where tree processing occurs.

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

prepareState

private WalkState prepareState(Resolver resolver,
                               Aast here)

Setup the resolver and walk state for the walk of a tree at the beginning of a walk element in the pipeline. In each such element, the editable tree from the previous element is the new source tree. Then a duplicate is made of the source tree as the editable tree. If the pipeline is read-only, then the source and editable trees will be the same. Either way, the resolver must be configured to have the ID to node cache pre-loaded. Finally, the walk state must be instantiated and returned.

Parameters:

resolver - The resolver used in the previous walk element or null for the first walk element.

here - This is the root node for the read-only "source" tree.

Returns:

The walk state for the first