GroovyClassLoader (groovy 3.0.4 API)

groovy.lang.GroovyClassLoader

```
public class GroovyClassLoader
extends URLClassLoader
```
A ClassLoader which can load Groovy classes. The loaded classes are cached, classes from other classloaders should not be cached. To be able to load a script that was asked for earlier but was created later it is essential not to keep anything like a "class not found" information for that class name. This includes possible parent loaders. Classes that are not cached are always reloaded.

Nested Class Summary

Nested classes
Modifiers	Name	Description
`static class`	`GroovyClassLoader.ClassCollector`
`static class`	`GroovyClassLoader.InnerLoader`

Field Summary

Fields
Modifiers	Name	Description
`protected EvictableCache<String, Class>`	`classCache`	this cache contains the loaded classes or PARSING, if the class is currently parsed
`protected StampedCommonCache<String, Class>`	`sourceCache`	This cache contains mappings of file name to class.

Constructor Summary

Constructors
Constructor and description
`GroovyClassLoader ()` creates a GroovyClassLoader using the current Thread's context Class loader as parent.
`GroovyClassLoader (ClassLoader loader)` creates a GroovyClassLoader using the given ClassLoader as parent
`GroovyClassLoader (GroovyClassLoader parent)` creates a GroovyClassLoader using the given GroovyClassLoader as parent.
`GroovyClassLoader (ClassLoader parent, CompilerConfiguration config, boolean useConfigurationClasspath)` creates a GroovyClassLoader.
`GroovyClassLoader (ClassLoader loader, CompilerConfiguration config)` creates a GroovyClassLoader using the given ClassLoader as parent.

Methods Summary

Methods
Type Params	Return Type	Name and description
	`void`	`addClasspath(String path)` adds a classpath to this classloader.
	`void`	`addURL(URL url)` adds a URL to the classloader.
	`void`	`clearCache()` Removes all classes from the class cache.
	`void`	`close()` Closes this GroovyClassLoader and clears any caches it maintains.
	`protected GroovyClassLoader.ClassCollector`	`createCollector(CompilationUnit unit, SourceUnit su)` creates a ClassCollector for a new compilation.
	`protected CompilationUnit`	`createCompilationUnit(CompilerConfiguration config, CodeSource source)` creates a new CompilationUnit.
	`Class`	`defineClass(ClassNode classNode, String file, String newCodeBase)` Loads the given class node returning the implementation Class.
	`Class`	`defineClass(String name, byte[] b)` open up the super class define that takes raw bytes
	`String`	`generateScriptName()`
	`protected Class`	`getClassCacheEntry(String name)` gets a class from the class cache.
	`protected String[]`	`getClassPath()` gets the currently used classpath.
	`Class[]`	`getLoadedClasses()`
	`protected PermissionCollection`	`getPermissions(CodeSource codeSource)`
	`GroovyResourceLoader`	`getResourceLoader()`
	`protected long`	`getTimeStamp(Class cls)` gets the time stamp of a given class.
	`boolean`	`hasCompatibleConfiguration(CompilerConfiguration config)` Check if this class loader has compatible CompilerConfiguration with the provided one.
	`protected boolean`	`isRecompilable(Class cls)` Indicates if a class is recompilable.
	`Boolean`	`isShouldRecompile()` gets the currently set recompilation mode. null means, the compiler configuration is used.
	`protected boolean`	`isSourceNewer(URL source, Class cls)` Decides if the given source is newer than a class.
	`Class`	`loadClass(String name, boolean lookupScriptFiles, boolean preferClassOverScript)` loads a class from a file or a parent classloader.
	`Class`	`loadClass(String name, boolean lookupScriptFiles, boolean preferClassOverScript, boolean resolve)` loads a class from a file or a parent classloader.
	`Class<?>`	`loadClass(String name)`
	`protected Class`	`loadClass(String name, boolean resolve)` Implemented here to check package access prior to returning an already loaded class.
	`URL`	`loadGroovySource(String filename)`
	`Class`	`parseClass(File file)` Parses the given file into a Java class capable of being run
	`Class`	`parseClass(String text, String fileName)` Parses the given text into a Java class capable of being run
	`Class`	`parseClass(String text)` Parses the given text into a Java class capable of being run
	`Class`	`parseClass(Reader reader, String fileName)`
	`Class`	`parseClass(InputStream in, String fileName)` deprecated: Prefer using methods taking a Reader rather than an InputStream to avoid wrong encoding issues.
	`Class`	`parseClass(GroovyCodeSource codeSource)`
	`Class`	`parseClass(GroovyCodeSource codeSource, boolean shouldCacheSource)` Parses the given code source into a Java class.
	`protected Class`	`recompile(URL source, String className, Class oldClass)` (Re)Compiles the given source.
	`protected void`	`removeClassCacheEntry(String name)` removes a class from the class cache.
	`ProtectionDomain`	`run()`
	`protected void`	`setClassCacheEntry(Class cls)` sets an entry in the class cache.
	`void`	`setResourceLoader(GroovyResourceLoader resourceLoader)`
	`void`	`setShouldRecompile(Boolean mode)` sets if the recompilation should be enable.

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class URLClassLoader`	newInstance, newInstance, getResourceAsStream, findResource, findResources, close, getURLs, loadClass, getPlatformClassLoader, getSystemClassLoader, getName, getResource, getSystemResourceAsStream, getSystemResource, getResources, resources, isRegisteredAsParallelCapable, getSystemResources, getParent, getUnnamedModule, getDefinedPackage, getDefinedPackages, setDefaultAssertionStatus, setPackageAssertionStatus, setClassAssertionStatus, clearAssertionStatus, wait, wait, wait, equals, toString, hashCode, getClass, notify, notifyAll

- Field Detail
  - protected final EvictableCache<String, Class> classCache
    
    this cache contains the loaded classes or PARSING, if the class is currently parsed
  - protected final StampedCommonCache<String, Class> sourceCache
    
    This cache contains mappings of file name to class. It is used to bypass compilation.
- Constructor Detail
  - public GroovyClassLoader()
    
    creates a GroovyClassLoader using the current Thread's context Class loader as parent.
  - public GroovyClassLoader(ClassLoader loader)
    
    creates a GroovyClassLoader using the given ClassLoader as parent
  - public GroovyClassLoader(GroovyClassLoader parent)
    
    creates a GroovyClassLoader using the given GroovyClassLoader as parent. This loader will get the parent's CompilerConfiguration
  - public GroovyClassLoader(ClassLoader parent, CompilerConfiguration config, boolean useConfigurationClasspath)
    
    creates a GroovyClassLoader.
    Parameters:
    parent - the parent class loader
    config - the compiler configuration
    useConfigurationClasspath - determines if the configurations classpath should be added
  - public GroovyClassLoader(ClassLoader loader, CompilerConfiguration config)
    
    creates a GroovyClassLoader using the given ClassLoader as parent.
- Method Detail
  - public void addClasspath(String path)
    
    adds a classpath to this classloader.
    Parameters:
    path - is a jar file or a directory.
    See Also:
    addURL(URL)
  - public void addURL(URL url)
    
    adds a URL to the classloader.
    Parameters:
    url - the new classpath element
  - public void clearCache()
    
    Removes all classes from the class cache.
    In addition to internal caches this method also clears any previously set MetaClass information for the given set of classes being removed.
    See Also:
    getClassCacheEntry(String)
    setClassCacheEntry(Class)
    removeClassCacheEntry(String)
  - @Override public void close()
    
    Closes this GroovyClassLoader and clears any caches it maintains.
    No use should be made of this instance after this method is invoked. Any classes that are already loaded are still accessible.
    throws:
    IOException
    
    See Also:
    URLClassLoader.close
    clearCache()
    Since:
    2.5.0
  - protected GroovyClassLoader.ClassCollector createCollector(CompilationUnit unit, SourceUnit su)
    
    creates a ClassCollector for a new compilation.
    Parameters:
    unit - the compilationUnit
    su - the SourceUnit
    Returns:
    the ClassCollector
  - protected CompilationUnit createCompilationUnit(CompilerConfiguration config, CodeSource source)
    
    creates a new CompilationUnit. If you want to add additional phase operations to the CompilationUnit (for example to inject additional methods, variables, fields), then you should overwrite this method.
    Parameters:
    config - the compiler configuration, usually the same as for this class loader
    source - the source containing the initial file to compile, more files may follow during compilation
    Returns:
    the CompilationUnit
  - public Class defineClass(ClassNode classNode, String file, String newCodeBase)
    
    Loads the given class node returning the implementation Class.
    WARNING: this compilation is not synchronized
    Parameters:
    classNode
    Returns:
    a class
  - public Class defineClass(String name, byte[] b)
    
    open up the super class define that takes raw bytes
  - public String generateScriptName()
  - protected Class getClassCacheEntry(String name)
    
    gets a class from the class cache. This cache contains only classes loaded through this class loader or an InnerLoader instance. If no class is stored for a specific name, then the method should return null.
    Parameters:
    name - of the class
    Returns:
    the class stored for the given name
    See Also:
    removeClassCacheEntry(String)
    setClassCacheEntry(Class)
    clearCache()
  - protected String[] getClassPath()
    
    gets the currently used classpath.
    Returns:
    a String[] containing the file information of the urls
    See Also:
    getURLs()
  - public Class[] getLoadedClasses()
    
    Returns all Groovy classes loaded by this class loader.
    Returns:
    all classes loaded by this class loader
  - protected PermissionCollection getPermissions(CodeSource codeSource)
  - public GroovyResourceLoader getResourceLoader()
  - protected long getTimeStamp(Class cls)
    
    gets the time stamp of a given class. For groovy generated classes this usually means to return the value of the static field __timeStamp. If the parameter doesn't have such a field, then Long.MAX_VALUE is returned
    Parameters:
    cls - the class
    Returns:
    the time stamp
  - public boolean hasCompatibleConfiguration(CompilerConfiguration config)
    
    Check if this class loader has compatible CompilerConfiguration with the provided one.
    Parameters:
    config - the compiler configuration to test for compatibility
    Returns:
    true if the provided config is exactly the same instance of CompilerConfiguration as this loader has
  - protected boolean isRecompilable(Class cls)
    
    Indicates if a class is recompilable. Recompilable means, that the classloader will try to locate a groovy source file for this class and then compile it again, adding the resulting class as entry to the cache. Giving null as class is like a recompilation, so the method should always return true here. Only classes that are implementing GroovyObject are compilable and only if the timestamp in the class is lower than Long.MAX_VALUE.
    NOTE: First the parent loaders will be asked and only if they don't return a class the recompilation will happen. Recompilation also only happen if the source file is newer.
    Parameters:
    cls - the class to be tested. If null the method should return true
    Returns:
    true if the class should be compiled again
    See Also:
    isSourceNewer(URL, Class)
  - public Boolean isShouldRecompile()
    
    gets the currently set recompilation mode. null means, the compiler configuration is used. False means no recompilation and true means that recompilation will be done if needed.
    Returns:
    the recompilation mode
  - protected boolean isSourceNewer(URL source, Class cls)
    
    Decides if the given source is newer than a class.
    throws:
    IOException if it is not possible to open an connection for the given source
    
    Parameters:
    source - the source we may want to compile
    cls - the former class
    Returns:
    true if the source is newer, false else
    See Also:
    getTimeStamp(Class)
  - public Class loadClass(String name, boolean lookupScriptFiles, boolean preferClassOverScript)
    
    loads a class from a file or a parent classloader. This method does call loadClass(String, boolean, boolean, boolean) with the last parameter set to false.
    throws:
    CompilationFailedException if compilation was not successful
  - public Class loadClass(String name, boolean lookupScriptFiles, boolean preferClassOverScript, boolean resolve)
    
    loads a class from a file or a parent classloader.
    throws:
    ClassNotFoundException if the class could not be found
    throws:
    CompilationFailedException if the source file could not be compiled
    
    Parameters:
    name - of the class to be loaded
    lookupScriptFiles - if false no lookup at files is done at all
    preferClassOverScript - if true the file lookup is only done if there is no class
    resolve - see ClassLoader.loadClass
    Returns:
    the class found or the class created from a file lookup
  - @Override public Class<?> loadClass(String name)
  - protected Class loadClass(String name, boolean resolve)
    
    Implemented here to check package access prior to returning an already loaded class.
    throws:
    CompilationFailedException if the compilation failed
    throws:
    ClassNotFoundException if the class was not found
    
    See Also:
    ClassLoader.loadClass
  - public URL loadGroovySource(String filename)
  - public Class parseClass(File file)
    
    Parses the given file into a Java class capable of being run
    Parameters:
    file - the file name to parse
    Returns:
    the main class defined in the given script
  - public Class parseClass(String text, String fileName)
    
    Parses the given text into a Java class capable of being run
    Parameters:
    text - the text of the script/class to parse
    fileName - the file name to use as the name of the class
    Returns:
    the main class defined in the given script
  - public Class parseClass(String text)
    
    Parses the given text into a Java class capable of being run
    Parameters:
    text - the text of the script/class to parse
    Returns:
    the main class defined in the given script
  - public Class parseClass(Reader reader, String fileName)
  - @Deprecated public Class parseClass(InputStream in, String fileName)
    
    deprecated:
    Prefer using methods taking a Reader rather than an InputStream to avoid wrong encoding issues. Use parseClass instead
  - public Class parseClass(GroovyCodeSource codeSource)
  - public Class parseClass(GroovyCodeSource codeSource, boolean shouldCacheSource)
    
    Parses the given code source into a Java class. If there is a class file for the given code source, then no parsing is done, instead the cached class is returned.
    Parameters:
    shouldCacheSource - if true then the generated class will be stored in the source cache
    Returns:
    the main class defined in the given script
  - protected Class recompile(URL source, String className, Class oldClass)
    
    (Re)Compiles the given source. This method starts the compilation of a given source, if the source has changed since the class was created. For this isSourceNewer is called.
    throws:
    CompilationFailedException if the compilation failed
    throws:
    IOException if the source is not readable
    
    Parameters:
    source - the source pointer for the compilation
    className - the name of the class to be generated
    oldClass - a possible former class
    Returns:
    the old class if the source wasn't new enough, the new class else
    See Also:
    isSourceNewer(URL, Class)
  - protected void removeClassCacheEntry(String name)
    
    removes a class from the class cache.
    Parameters:
    name - of the class
    See Also:
    getClassCacheEntry(String)
    setClassCacheEntry(Class)
    clearCache()
  - public ProtectionDomain run()
  - protected void setClassCacheEntry(Class cls)
    
    sets an entry in the class cache.
    Parameters:
    cls - the class
    See Also:
    removeClassCacheEntry(String)
    getClassCacheEntry(String)
    clearCache()
  - public void setResourceLoader(GroovyResourceLoader resourceLoader)
  - public void setShouldRecompile(Boolean mode)
    
    sets if the recompilation should be enable. There are 3 possible values for this. Any value different than null overrides the value from the compiler configuration. true means to recompile if needed false means to never recompile.
    Parameters:
    mode - the recompilation mode
    See Also:
    CompilerConfiguration

| Detail:
Field
Constructor
Method

[Java] Class GroovyClassLoader

Nested Class Summary

Field Summary

Constructor Summary

Methods Summary

Inherited Methods Summary

Field Detail

protected final EvictableCache<String, Class> classCache

protected final StampedCommonCache<String, Class> sourceCache

Constructor Detail

public GroovyClassLoader()

public GroovyClassLoader(ClassLoader loader)

public GroovyClassLoader(GroovyClassLoader parent)

public GroovyClassLoader(ClassLoader parent, CompilerConfiguration config, boolean useConfigurationClasspath)

public GroovyClassLoader(ClassLoader loader, CompilerConfiguration config)

Method Detail

public void addClasspath(String path)

public void addURL(URL url)

public void clearCache()

@Override public void close()

protected GroovyClassLoader.ClassCollector createCollector(CompilationUnit unit, SourceUnit su)

protected CompilationUnit createCompilationUnit(CompilerConfiguration config, CodeSource source)

public Class defineClass(ClassNode classNode, String file, String newCodeBase)

public Class defineClass(String name, byte[] b)

public String generateScriptName()

protected Class getClassCacheEntry(String name)

protected String[] getClassPath()

public Class[] getLoadedClasses()

protected PermissionCollection getPermissions(CodeSource codeSource)

public GroovyResourceLoader getResourceLoader()

protected long getTimeStamp(Class cls)

public boolean hasCompatibleConfiguration(CompilerConfiguration config)

protected boolean isRecompilable(Class cls)

public Boolean isShouldRecompile()

protected boolean isSourceNewer(URL source, Class cls)

public Class loadClass(String name, boolean lookupScriptFiles, boolean preferClassOverScript)

public Class loadClass(String name, boolean lookupScriptFiles, boolean preferClassOverScript, boolean resolve)

@Override public Class<?> loadClass(String name)

protected Class loadClass(String name, boolean resolve)

public URL loadGroovySource(String filename)

public Class parseClass(File file)

public Class parseClass(String text, String fileName)

public Class parseClass(String text)

public Class parseClass(Reader reader, String fileName)

@Deprecated public Class parseClass(InputStream in, String fileName)

public Class parseClass(GroovyCodeSource codeSource)

public Class parseClass(GroovyCodeSource codeSource, boolean shouldCacheSource)

protected Class recompile(URL source, String className, Class oldClass)

protected void removeClassCacheEntry(String name)

public ProtectionDomain run()

protected void setClassCacheEntry(Class cls)

public void setResourceLoader(GroovyResourceLoader resourceLoader)

public void setShouldRecompile(Boolean mode)