com.facebook.buck.android.dalvik

Class DalvikAwareZipSplitter

java.lang.Object

com.facebook.buck.android.dalvik.DalvikAwareZipSplitter

All Implemented Interfaces:

ZipSplitter

public class DalvikAwareZipSplitter
extends Object
implements ZipSplitter

Implementation of ZipSplitter that uses estimates from DalvikStatsTool to determine how many classes to pack into a dex.

It does three passes through the .class files:

• During the first pass, it uses the requiredInPrimaryZip predicate to filter the set of classes that must be included in the primary dex. These classes are added to the primary zip.
• During the second pass, it uses the wantedInPrimaryZip list to find classes that were not included in the first pass but that should still be in the primary zip for performance reasons, and adds them to the primary zip.
• During the third pass, classes that were not matched during the earlier passes are added to zips as space allows. This is a simple, greedy algorithm.

Nested Class Summary

Nested classes/interfaces inherited from interface com.facebook.buck.android.dalvik.ZipSplitter

ZipSplitter.DexSplitStrategy

Method Summary

Modifier and Type	Method and Description
com.google.common.collect.ImmutableMultimap<APKModule,Path>	execute() Writes the primary zip file and if necessary, the secondary zip files.
static DalvikAwareZipSplitter	splitZip(ProjectFilesystem filesystem, Set<Path> inFiles, Path outPrimary, Path outSecondaryDir, String secondaryPattern, Path outDexStoresDir, long linearAllocLimit, java.util.function.Predicate<String> requiredInPrimaryZip, Set<String> wantedInPrimaryZip, com.google.common.collect.ImmutableSet<String> secondaryHeadSet, com.google.common.collect.ImmutableSet<String> secondaryTailSet, com.google.common.collect.ImmutableMultimap<APKModule,String> additionalDexStoreSets, APKModule rootAPKModule, ZipSplitter.DexSplitStrategy dexSplitStrategy, Path reportDir)

Methods inherited from class java.lang.Object

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

Method Detail

splitZip

public static DalvikAwareZipSplitter splitZip(ProjectFilesystem filesystem,
                                              Set<Path> inFiles,
                                              Path outPrimary,
                                              Path outSecondaryDir,
                                              String secondaryPattern,
                                              Path outDexStoresDir,
                                              long linearAllocLimit,
                                              java.util.function.Predicate<String> requiredInPrimaryZip,
                                              Set<String> wantedInPrimaryZip,
                                              com.google.common.collect.ImmutableSet<String> secondaryHeadSet,
                                              com.google.common.collect.ImmutableSet<String> secondaryTailSet,
                                              com.google.common.collect.ImmutableMultimap<APKModule,String> additionalDexStoreSets,
                                              APKModule rootAPKModule,
                                              ZipSplitter.DexSplitStrategy dexSplitStrategy,
                                              Path reportDir)

execute

public com.google.common.collect.ImmutableMultimap<APKModule,Path> execute()
                                                                    throws IOException

Description copied from interface: ZipSplitter

Writes the primary zip file and if necessary, the secondary zip files.

Specified by:

execute in interface ZipSplitter

Returns:

output map of dex store to zip files.

Throws:

IOException