public class GrailsMetaClassUtils extends java.lang.Object
Provides utility methods for working with the Groovy MetaClass API.
| Modifiers | Name | Description |
|---|---|---|
private static org.apache.commons.logging.Log |
LOG |
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private static int |
MAX_DELEGATE_LEVELS |
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private static java.lang.Object[] |
NO_ARGS |
| Type Params | Return Type | Name and description |
|---|---|---|
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public static void |
copyExpandoMetaClass(java.lang.Class<?> fromClass, java.lang.Class<?> toClass, boolean removeSource)Copies the ExpandoMetaClass dynamic methods and properties from one Class to another. |
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public static groovy.lang.ExpandoMetaClass |
getExpandoMetaClass(java.lang.Class<?> aClass) |
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public static groovy.lang.MetaClass |
getMetaClass(java.lang.Object instance) |
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public static java.lang.Object |
getPropertyIfExists(java.lang.Object instance, java.lang.String property)Obtains a property of an instance if it exists |
<T> |
public static T |
getPropertyIfExists(java.lang.Object instance, java.lang.String property, java.lang.Class<T> requiredType)Obtains a property of an instance if it exists |
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public static groovy.lang.MetaClassRegistry |
getRegistry()Retrieves the MetaClassRegistry instance. |
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public static java.lang.Object |
invokeMethodIfExists(java.lang.Object instance, java.lang.String methodName)Invokes a method if it exists otherwise returns null |
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public static java.lang.Object |
invokeMethodIfExists(java.lang.Object instance, java.lang.String methodName, java.lang.Object[] args)Invokes a method if it exists otherwise returns null |
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private static groovy.lang.MetaClass |
unwrapDelegatingMetaClass(groovy.lang.MetaClass metaClass) |
| Methods inherited from class | Name |
|---|---|
class java.lang.Object |
java.lang.Object#wait(long), java.lang.Object#wait(long, int), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll() |
Copies the ExpandoMetaClass dynamic methods and properties from one Class to another.
fromClass - The source classtoClass - The destination classremoveSource - Whether to remove the source class after completion. True if yesObtains a property of an instance if it exists
instance - The instanceproperty - The propertyObtains a property of an instance if it exists
instance - The instanceproperty - The propertyrequiredType - The required type of the propertyRetrieves the MetaClassRegistry instance.
Invokes a method if it exists otherwise returns null
instance - The instancemethodName - The method nameInvokes a method if it exists otherwise returns null
instance - The instancemethodName - The method nameargs - The arguments