com.android.build.gradle.shrinker

Class IncrementalShrinker<T>

java.lang.Object

com.android.build.gradle.shrinker.AbstractShrinker<T>

com.android.build.gradle.shrinker.IncrementalShrinker<T>

public class IncrementalShrinker<T>
extends AbstractShrinker<T>

Code for incremental shrinking.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	IncrementalShrinker.IncrementalRunImpossibleException Exception thrown when the incremental shrinker detects incompatible changes and requests a full run instead.

Nested classes/interfaces inherited from class com.android.build.gradle.shrinker.AbstractShrinker

AbstractShrinker.CounterSet

Field Summary

Fields inherited from class com.android.build.gradle.shrinker.AbstractShrinker

mExecutor, mGraph, mShrinkerLogger

Constructor Summary

Constructors

Constructor and Description
IncrementalShrinker(com.android.ide.common.internal.WaitableExecutor executor, ShrinkerGraph<T> graph, ShrinkerLogger shrinkerLogger, BytecodeVersion bytecodeVersion)

Method Summary

Modifier and Type	Method and Description
void	incrementalRun(java.lang.Iterable<com.android.build.api.transform.TransformInput> inputs, com.android.build.api.transform.TransformOutputProvider output) Perform incremental shrinking, in the supported cases (where only code in pre-existing methods has been modified).
protected void	waitForAllTasks()

Methods inherited from class com.android.build.gradle.shrinker.AbstractShrinker

chooseOutputFile, getAllDirectories, getAllJars, incrementCounter, isProgramClass, logTime, resolveReferences, rewrite, setCounters, updateClassFiles

Methods inherited from class java.lang.Object

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

Constructor Detail

IncrementalShrinker

public IncrementalShrinker(@NonNull
                           com.android.ide.common.internal.WaitableExecutor executor,
                           @NonNull
                           ShrinkerGraph<T> graph,
                           @NonNull
                           ShrinkerLogger shrinkerLogger,
                           @Nullable
                           BytecodeVersion bytecodeVersion)

Method Detail

incrementalRun

public void incrementalRun(@NonNull
                           java.lang.Iterable<com.android.build.api.transform.TransformInput> inputs,
                           @NonNull
                           com.android.build.api.transform.TransformOutputProvider output)
                    throws java.io.IOException,
                           IncrementalShrinker.IncrementalRunImpossibleException

Perform incremental shrinking, in the supported cases (where only code in pre-existing methods has been modified).

The general idea is this: for every method in modified classes, remove all outgoing "code reference" edges, add them again based on the current code and then set the counters again (traverse the graph) using the new set of edges.

The counters are re-calculated every time from scratch (starting from known entry points from the config file) to avoid cycles being left in the output.

Throws:

IncrementalShrinker.IncrementalRunImpossibleException - If incremental shrinking is impossible and a full run should be done instead.

java.io.IOException

waitForAllTasks

protected void waitForAllTasks()

Overrides:

waitForAllTasks in class AbstractShrinker<T>