Weak hands cannot be planted, meager skills have no foundation. Shallow wisdom is futile, how can one hope for a good name?扰扰从役倦，屑屑身事微。少壮轻年月，迟暮惜光辉。
has( $id ) ) {
$this->set( $id );
}
if ( $this->entries[ $id ] instanceof Closure || is_callable( $this->entries[ $id ] ) ) {
return $this->entries[ $id ]( $this );
}
if ( isset( $this->rules['shared'] ) && in_array( $id, $this->rules['shared'], true ) ) {
return $this->singleton( $id );
}
return $this->resolve( $id );
}
public function has( mixed $id ): bool {
return isset( $this->entries[ $id ] );
}
public function set( mixed $entry, mixed $concrete = null ): void {
if ( is_null( $concrete ) ) {
$concrete = $entry;
}
$this->entries[ $entry ] = $concrete;
}
public function resolve( mixed $alias ): mixed {
$reflector = $this->getReflector( $alias );
$constructor = $reflector->getConstructor();
if ( $reflector->isInterface() ) {
return $this->resolveInterface( $reflector );
}
if ( ! $reflector->isInstantiable() ) {
throw new Exception(
esc_html( "Cannot inject {$reflector->getName()} because it cannot be instantiated" )
);
}
if ( $constructor === null ) {
return $reflector->newInstance();
}
$args = $this->getArguments( $alias, $constructor );
return $reflector->newInstanceArgs( $args );
}
public function singleton( mixed $alias ): mixed {
if ( ! isset( $this->instances[ $alias ] ) ) {
$this->instances[ $alias ] = $this->resolve(
$this->entries[ $alias ]
);
}
return $this->instances[ $alias ];
}
public function getReflector( string $alias ): ReflectionClass {
$class = $this->entries[ $alias ];
try {
return ( new ReflectionClass( $class ) );
} catch ( ReflectionException $e ) {
throw new Exception(
esc_html( $e->getMessage() ),
esc_html( $e->getCode() )
);
}
}
public function getArguments( mixed $alias, ReflectionMethod $constructor ): array {
$args = array();
$params = $constructor->getParameters();
foreach ( $params as $param ) {
$type = $param->getType();
if ( $type && ! $type->isBuiltin() ) {
$class_name = $type->getName();
$args[] = $this->get( $class_name );
} elseif ( $param->isDefaultValueAvailable() ) {
$args[] = $param->getDefaultValue();
} elseif ( isset( $this->rules[ $alias ][ $param->getName() ] ) ) {
$args[] = $this->rules[ $alias ][ $param->getName() ];
}
}
return $args;
}
public function resolveInterface( ReflectionClass $reflector ): mixed {
if ( isset( $this->rules['substitute'][ $reflector->getName() ] ) ) {
return $this->get(
$this->rules['substitute'][ $reflector->getN