com.facebook.buck.jvm.java

Class AccumulateClassNamesStep

java.lang.Object

com.facebook.buck.jvm.java.AccumulateClassNamesStep

All Implemented Interfaces:

Step

public class AccumulateClassNamesStep
extends Object
implements Step

Step that takes a directory or zip of .class files and traverses it to get the total set of .class files included by the directory or zip.

Constructor Summary

Constructors

Constructor and Description
AccumulateClassNamesStep(ProjectFilesystem filesystem, Optional<Path> pathToJarOrClassesDirectory, Path whereClassNamesShouldBeWritten)

Method Summary

Modifier and Type	Method and Description
static Optional<com.google.common.collect.ImmutableSortedMap<String,com.google.common.hash.HashCode>>	calculateClassHashes(ExecutionContext context, ProjectFilesystem filesystem, Path path)
StepExecutionResult	execute(ExecutionContext context)
String	getDescription(ExecutionContext context)
String	getShortName()
static com.google.common.collect.ImmutableSortedMap<String,com.google.common.hash.HashCode>	parseClassHashes(List<String> lines)

Methods inherited from class java.lang.Object

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

Constructor Detail

AccumulateClassNamesStep

public AccumulateClassNamesStep(ProjectFilesystem filesystem,
                                Optional<Path> pathToJarOrClassesDirectory,
                                Path whereClassNamesShouldBeWritten)

Parameters:

pathToJarOrClassesDirectory - Where to look for .class files. If absent, then an empty file will be written to whereClassNamesShouldBeWritten.

whereClassNamesShouldBeWritten - Path to a file where an alphabetically sorted list of class files and corresponding SHA-1 hashes of their contents will be written.

Method Detail

execute

public StepExecutionResult execute(ExecutionContext context)
                            throws IOException

Specified by:

execute in interface Step

Throws:

IOException

getShortName

public String getShortName()

Specified by:

getShortName in interface Step

Returns:

a short name/description for the command, such as "javac". Should fit on one line.

getDescription

public String getDescription(ExecutionContext context)

Specified by:

getDescription in interface Step

calculateClassHashes

public static Optional<com.google.common.collect.ImmutableSortedMap<String,com.google.common.hash.HashCode>> calculateClassHashes(ExecutionContext context,
                                                                                                                                  ProjectFilesystem filesystem,
                                                                                                                                  Path path)

Returns:

an Optional that will be absent if there was an error.

parseClassHashes

public static com.google.common.collect.ImmutableSortedMap<String,com.google.common.hash.HashCode> parseClassHashes(List<String> lines)

Parameters:

lines - that were written in the same format output by execute(ExecutionContext).