Framework and Dynamic Loading

def dyld_framework(filename, framework_name, version=None):
    """
    Find framework using dyld semantics.
    
    Args:
        filename (str): Framework filename
        framework_name (str): Name of the framework
        version (str, optional): Specific version to load
        
    Returns:
        str: Path to the framework or None if not found
    """

def dyld_library(filename, libname):
    """
    Find dynamic library using dyld semantics.
    
    Args:
        filename (str): Library filename
        libname (str): Library name
        
    Returns:
        str: Path to the library or None if not found
    """

def dyld_find(filename):
    """
    Generic dyld locator function for libraries and frameworks.
    
    Args:
        filename (str): File to locate using dyld search paths
        
    Returns:
        str: Full path to located file or None if not found
    """

def pathForFramework(path):
    """
    Get the full path for a framework.
    
    Args:
        path (str): Framework path or name
        
    Returns:
        str: Full framework path
    """

def infoForFramework(filename):
    """
    Get framework metadata information.
    
    Args:
        filename (str): Framework filename or path
        
    Returns:
        dict: Framework information including version, identifier, etc.
    """

def initFrameworkWrapper(frameworkName, frameworkPath, frameworkIdentifier, 
                        isIndirect=False, frameworkDict=None, 
                        frameworkGlobals=None, inline_list=None, 
                        initialdict=None, metadict=None):
    """
    Initialize a framework wrapper with BridgeSupport data.
    
    Args:
        frameworkName (str): Name of the framework
        frameworkPath (str): Path to framework bundle
        frameworkIdentifier (str): Framework bundle identifier
        isIndirect (bool): Whether framework is loaded indirectly
        frameworkDict (dict, optional): Framework-specific data
        frameworkGlobals (dict, optional): Global symbols
        inline_list (list, optional): Inline function definitions
        initialdict (dict, optional): Initial symbol dictionary
        metadict (dict, optional): Metadata dictionary
        
    Returns:
        Module-like object providing access to framework APIs
    """

def parseBridgeSupport(xmldata, globals, frameworkName, dylib_path=None, inlineTab=None):
    """
    Parse BridgeSupport XML files to extract API metadata.
    
    Args:
        xmldata (bytes): BridgeSupport XML data
        globals (dict): Global namespace to populate
        frameworkName (str): Name of the framework being parsed
        dylib_path (str, optional): Path to dynamic library
        inlineTab (dict, optional): Inline function table
        
    Populates the globals dictionary with parsed API definitions.
    """

class ObjCLazyModule:
    """
    Lazy module loading class for frameworks.
    
    Delays actual framework loading until first access to minimize
    startup time and memory usage.
    """

def createFrameworkDirAndGetattr():
    """
    Framework directory creation utility for lazy loading.
    
    Creates framework directory structures and handles attribute
    access for lazy-loaded framework modules.
    """

import objc
from objc import dyld_framework, pathForFramework, initFrameworkWrapper

# Find and load a framework
framework_path = dyld_framework("AppKit", "AppKit")
if framework_path:
    print(f"Found AppKit at: {framework_path}")

# Get framework information
info = infoForFramework("Foundation")
print(f"Foundation info: {info}")

# Load a custom framework
custom_path = dyld_framework("MyFramework", "MyFramework", version="1.0")

# Using lazy loading for better performance
class LazyFrameworkLoader:
    def __init__(self, framework_name):
        self.framework_name = framework_name
        self._framework = None
    
    @property
    def framework(self):
        if self._framework is None:
            path = dyld_framework(self.framework_name, self.framework_name)
            if path:
                self._framework = initFrameworkWrapper(
                    self.framework_name, 
                    path, 
                    f"com.apple.{self.framework_name.lower()}"
                )
        return self._framework

# Lazy load Core Graphics framework
cg_loader = LazyFrameworkLoader("CoreGraphics")
# Framework is only loaded when first accessed
cg_framework = cg_loader.framework

# Standard framework loading
import objc

# Load system frameworks (these are typically auto-loaded)
# Foundation and AppKit are loaded automatically with PyObjC

# Manual framework loading for less common frameworks
try:
    # Try to find and load Metal framework
    metal_path = objc.dyld_framework("Metal", "Metal")
    if metal_path:
        # Initialize Metal framework wrapper
        metal = objc.initFrameworkWrapper(
            "Metal",
            metal_path,
            "com.apple.Metal"
        )
        # Now can use Metal APIs
        print("Metal framework loaded successfully")
except Exception as e:
    print(f"Failed to load Metal framework: {e}")

# Loading private or third-party frameworks
custom_framework_path = "/Library/Frameworks/MyFramework.framework"
custom_info = objc.infoForFramework(custom_framework_path)
if custom_info:
    custom_framework = objc.initFrameworkWrapper(
        "MyFramework",
        custom_framework_path,
        custom_info.get("identifier", "com.example.MyFramework")
    )