JavaECS-Docs/docs/system/SystemManager.md

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System Manager

In this Section
About
Implementation
Constructors
Methods
Fields
Examples
Notes

About

The system manager class controls references to the systems.

Implementation

Before attempting to use a system, it must be registered.

Registration requires a call to registerSystem(String systemName, ECSSystem system), with params of the String name and a object reference of the ECSSystem. Using the object reference, a system can be invoked at any time.

See SystemManager.java for the full implementation.

Constructors

Default constructor

public SystemManager(){}

Methods

entityDestroyed

protected void entityDestroyed(int entity);

Signals the SystemManager that an entity was destroyed. Removes the entity from each system's tracked entities

entitySignatureChanged

protected void entityRegistrationsChanged(int entity, BitSet entityRegistrations);

Signals the SystemManager that an entity had its registrations changed; iterates through each system validating the entities list

registerSystem

protected boolean registerSystem(Type systemType, ECSSystem system);

Registers the specified system name and system reference to this manager.

adds a systemType:system pair to systems

adds a systemType:new BitSet() pair to registrationSignatures

setSignature

protected void setRegistrationSignature(Type systemType, BitSet registrations);

Sets the registrations the system requires

Fields

registrationSignatures

private Map<Type, BitSet> registrationSignatures = new HashMap<>()

The mapped list of required registrations

systems

private Map<Type, ECSSystem> systems = new HashMap<>();

The mapped list of system instances