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During the manipulation process, iPOJO gathers information about the manipulated classes. These metadata are stored inside the bundle manifest and are used to avoid reflection on the manipulated class. By using these metadata, your handler can check that the implementation class contains required fields, methods, interface ...check implemented interfaces.
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Contained information
Manipulation metadata contains:
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From the manipulation metadata, you can query manipulation information by using following methods:
MethodMetadata\[\] getMethods() : Get all methodsWiki Markup Wiki Markup - FieldMetadata\[\] getFields() : Get all fields
String\[\] getInterfaces() : Get all implemented interfacesWiki Markup - FieldMetadata getField(String name) : Look for the field with the given name. Returns null if not found.
- FieldMetadata getField(String name, String type): Look for the field with the given name and type. Returns null if not found.
- boolean isInterfaceImplemented(String itf) : Is the given interface name implemented by the manipulated class.
- MethodMetadata getMethod(String name) : Look for the method with the given name. Returns null if not found. Returns the first found if several method match.
MethodMetadata\[\] getMethods(String name) : Look for all methods with the given name. Returns an empty array if not found.Wiki Markup MethodMetadata getMethod(String name, String\[\] types) : Look for the method with the given name and argument type list. Returns null if not found.Wiki Markup
From a Field Metadata object, you can obtain the field name, type, and 'reflective' type. From a Method Metadata object, you can obtain the method name, the argument type array, and the returned type ('void' for void method).
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When querying field (or a method argument) type, the API will return returns following code identifieridentifiers:
- For primitive types : int, long, short, byte, char, double, float, booleanunmigrated-wiki-markup
- For primitives type arrays : int\[\], long\[\], short\[\], byte\[\], char\[\], double\[\], float\[\], boolean\[\]
- For object : qualified class name as java.lang.String
For object arrays : the qualified class name of the content type followed by \ [\] as java.lang.String\[\]Wiki Markup
Array types are different from Java internal/reflective array types. To get the internal/reflective array type for field type you can use the getReflectiveType
method.
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