Package com.yworks.yshrink

Class YShrink

java.lang.Object

com.yworks.yshrink.YShrink

public class YShrink
extends java.lang.Object

How the Shrinker works: - Initially, no node is marked as instantiated and all nodes are marked as obsolete. - Using the global entrypoint-node as the startnode, a dfs is run on the dependency graph. - Edges are traversed under the following conditions: - If the target node is a class or field node, the edge may always be traversed. - An edge to a method node may be traversed if it is not a RESOLVE edge and: - The target method is a invoke dynamic or - The target method is static or - The edge represents a super call or - The target node is the NEW-node of a class or - The target method is a constructor or - The target method is private or - The target method is a regular method and the class the method belongs to is marked as instantiated or - The target method is needed, i.e. a child class of the class the method belongs to is instantiated and does not override the method. - If an edge is allowed to be traversed and the target node is a NEW-node, the corresponding class is marked as instantiated. - As long as the amount of classes marked as instantiated increases, rerun the dfs. - If the amount of classes marked as instantiated does not increase between two dfs-rounds, a last dfs is run in order to mark all reachable nodes as non-obsolete. Also, the RESOLVE edges that target methods are allowed to be traversed in this last round in order to mark the target methods as needed for resolving (that is, only a stub of these methods is needed).

Constructor Summary

Constructors

Constructor	Description
YShrink()	Instantiates a new Y shrink.
YShrink(boolean createStubs, java.lang.String digests)	Instantiates a new Y shrink.

Method Summary

Modifier and Type	Method	Description
void	doShrinkPairs(java.util.List<ShrinkBag> pairs, EntryPointFilter epf, ClassResolver resolver)	Basic steps - Init model: create nodes for each class, method and field.
static void	main(java.lang.String[] args)	Main.

Methods inherited from class java.lang.Object

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

Constructor Detail

YShrink

public YShrink()

Instantiates a new Y shrink.

YShrink

public YShrink(boolean createStubs,
               java.lang.String digests)

Instantiates a new Y shrink.

Parameters:

createStubs - the create stubs

digests - the digests

Method Detail

doShrinkPairs

public void doShrinkPairs(java.util.List<ShrinkBag> pairs,
                          EntryPointFilter epf,
                          ClassResolver resolver)
                   throws java.io.IOException

Basic steps - Init model: create nodes for each class, method and field. Additionally, create a single entrypoint-node and one NEW-node for each class. - Mark all entrypoints: using a composite EntryPointFilter, mark/log every entrypoint-node in the model. - Create all dependency edges using the com.yworks.yshrink.core.Analyzer. - Create additional entrypoint-edges between the entrypoint-node and each entrypoint that doesn't represent an ordinary method (non-abstract,non-static,non-constructor). - Mark all obsolete classes, methods and fields using the com.yworks.yshrink.core.Shrinker. - Write out all non-obsolete classes using the com.yworks.yshrink.core.Writer.

Parameters:

pairs - the pairs

epf - the epf

resolver - the resolver

Throws:

java.io.IOException - the io exception

main

public static void main(java.lang.String[] args)

Main.

Parameters:

args - the args