Package org.apache.xalan.extensions
Class MethodResolver
java.lang.Object
org.apache.xalan.extensions.MethodResolver
Utility class to help resolve method overloading with Xalan XSLT
argument types.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
Specifies a Dynamic method search.static final int
Specifies a search for instance methods only.static final int
Specifies a search for both static and instance methods.static final int
Specifies a search for static methods only. -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic void
convertParams
(Object[] argsIn, Object[][] argsOut, Class[] paramTypes, ExpressionContext exprContext) Convert a set of parameters based on a set of paramTypes.static Constructor
getConstructor
(Class classObj, Object[] argsIn, Object[][] argsOut, ExpressionContext exprContext) Given a class, figure out the resolution of the Java Constructor from the XSLT argument types, and perform the conversion of the arguments.static Method
getElementMethod
(Class classObj, String name) Given the name of a method, figure out the resolution of the Java Methodstatic Method
getMethod
(Class classObj, String name, Object[] argsIn, Object[][] argsOut, ExpressionContext exprContext, int searchMethod) Given the name of a method, figure out the resolution of the Java Method from the XSLT argument types, and perform the conversion of the arguments.static int
scoreMatch
(Class[] javaParamTypes, int javaParamsStart, Object[] xsltArgs, int score) Score the conversion of a set of XSLT arguments to a given set of Java parameters.
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Field Details
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STATIC_ONLY
public static final int STATIC_ONLYSpecifies a search for static methods only.- See Also:
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INSTANCE_ONLY
public static final int INSTANCE_ONLYSpecifies a search for instance methods only.- See Also:
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STATIC_AND_INSTANCE
public static final int STATIC_AND_INSTANCESpecifies a search for both static and instance methods.- See Also:
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DYNAMIC
public static final int DYNAMICSpecifies a Dynamic method search. If the method being evaluated is a static method, all arguments are used. Otherwise, it is an instance method and only arguments beginning with the second argument are used.- See Also:
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Constructor Details
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MethodResolver
public MethodResolver()
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Method Details
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getConstructor
public static Constructor getConstructor(Class classObj, Object[] argsIn, Object[][] argsOut, ExpressionContext exprContext) throws NoSuchMethodException, SecurityException, TransformerException Given a class, figure out the resolution of the Java Constructor from the XSLT argument types, and perform the conversion of the arguments.- Parameters:
classObj
- the Class of the object to be constructed.argsIn
- An array of XSLT/XPath arguments.argsOut
- An array of the exact size as argsIn, which will be populated with converted arguments if a suitable method is found.- Returns:
- A constructor that will work with the argsOut array.
- Throws:
TransformerException
- may be thrown for Xalan conversion exceptions.NoSuchMethodException
SecurityException
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getMethod
public static Method getMethod(Class classObj, String name, Object[] argsIn, Object[][] argsOut, ExpressionContext exprContext, int searchMethod) throws NoSuchMethodException, SecurityException, TransformerException Given the name of a method, figure out the resolution of the Java Method from the XSLT argument types, and perform the conversion of the arguments.- Parameters:
classObj
- The Class of the object that should have the method.name
- The name of the method to be invoked.argsIn
- An array of XSLT/XPath arguments.argsOut
- An array of the exact size as argsIn, which will be populated with converted arguments if a suitable method is found.- Returns:
- A method that will work with the argsOut array.
- Throws:
TransformerException
- may be thrown for Xalan conversion exceptions.NoSuchMethodException
SecurityException
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getElementMethod
public static Method getElementMethod(Class classObj, String name) throws NoSuchMethodException, SecurityException, TransformerException Given the name of a method, figure out the resolution of the Java Method- Parameters:
classObj
- The Class of the object that should have the method.name
- The name of the method to be invoked.- Returns:
- A method that will work to be called as an element.
- Throws:
TransformerException
- may be thrown for Xalan conversion exceptions.NoSuchMethodException
SecurityException
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convertParams
public static void convertParams(Object[] argsIn, Object[][] argsOut, Class[] paramTypes, ExpressionContext exprContext) throws TransformerException Convert a set of parameters based on a set of paramTypes.- Parameters:
argsIn
- An array of XSLT/XPath arguments.argsOut
- An array of the exact size as argsIn, which will be populated with converted arguments.paramTypes
- An array of class objects, of the exact same size as argsIn and argsOut.- Throws:
TransformerException
- may be thrown for Xalan conversion exceptions.
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scoreMatch
public static int scoreMatch(Class[] javaParamTypes, int javaParamsStart, Object[] xsltArgs, int score) Score the conversion of a set of XSLT arguments to a given set of Java parameters. If any invocations of this function for a method with the same name return the same positive value, then a conflict has occured, and an error should be signaled.- Parameters:
javaParamTypes
- Must be filled with valid class names, and of the same length as xsltArgs.xsltArgs
- Must be filled with valid object instances, and of the same length as javeParamTypes.- Returns:
- -1 for no allowed conversion, or a positive score that is closer to zero for more preferred, or further from zero for less preferred.
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