Components registry - Component / component state query methods

src/main/java/info/ebenoit/ebul/cmp/ComponentRegistry.java

@@ -3,7 +3,9 @@ package info.ebenoit.ebul.cmp;
 
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
 
@@ -48,6 +50,98 @@ public class ComponentRegistry
 	}
 
 
+	public ComponentState getState( String name )
+	{
+		return this.byName.get( name );
+	}
+
+
+	public ComponentState getState( Class< ? > type )
+			throws AmbiguousComponentException
+	{
+		ArrayList< ComponentState > l = this.byType.get( type );
+		if ( l == null ) {
+			return null;
+		}
+		if ( l.size( ) == 1 ) {
+			return l.get( 0 );
+		}
+		throw new AmbiguousComponentException( type , l.size( ) );
+	}
+
+
+	public List< ComponentState > getStates( Class< ? > type )
+			throws AmbiguousComponentException
+	{
+		ArrayList< ComponentState > l = this.byType.get( type );
+		if ( l == null ) {
+			return Collections.emptyList( );
+		}
+		return Collections.unmodifiableList( l );
+	}
+
+
+	public void getStates( Class< ? > type , Collection< ComponentState > states )
+	{
+		ArrayList< ComponentState > l = this.byType.get( type );
+		if ( l != null ) {
+			int nFound = l.size( );
+			for ( int i = 0 ; i < nFound ; i++ ) {
+				states.add( l.get( i ) );
+			}
+		}
+	}
+
+
+	public Object get( String name )
+	{
+		ComponentState cs = this.byName.get( name );
+		return cs == null ? null : cs.getComponent( );
+	}
+
+
+	public < T > T get( Class< T > type )
+			throws AmbiguousComponentException
+	{
+		ArrayList< ComponentState > l = this.byType.get( type );
+		if ( l == null ) {
+			return null;
+		}
+		if ( l.size( ) == 1 ) {
+			return type.cast( l.get( 0 ).getComponent( ) );
+		}
+		throw new AmbiguousComponentException( type , l.size( ) );
+	}
+
+
+	public < T > List< T > getAll( Class< T > type )
+	{
+		ArrayList< ComponentState > l = this.byType.get( type );
+		if ( l == null ) {
+			return Collections.emptyList( );
+		}
+
+		int nFound = l.size( );
+		ArrayList< T > result = new ArrayList< >( nFound );
+		for ( int i = 0 ; i < nFound ; i++ ) {
+			result.add( type.cast( l.get( i ).getComponent( ) ) );
+		}
+		return result;
+	}
+
+
+	public < T > void getAll( Class< T > type , Collection< T > result )
+	{
+		ArrayList< ComponentState > l = this.byType.get( type );
+		if ( l != null ) {
+			int nFound = l.size( );
+			for ( int i = 0 ; i < nFound ; i++ ) {
+				result.add( type.cast( l.get( i ).getComponent( ) ) );
+			}
+		}
+	}
+
+
 	public ComponentRegistry register( Collection< NewComponentInfo< ? > > components )
 			throws ComponentCreationException , DuplicateComponentException , RecursiveDependenciesException ,
 			DependencyInjectionException , AmbiguousComponentException