org.apache.camel.util.component
Class ApiMethodHelper<T extends Enum<T> & ApiMethod>

java.lang.Object
  org.apache.camel.util.component.ApiMethodHelper<T>

public final class ApiMethodHelper<T extends Enum<T> & ApiMethod>
extends Object

Helper class for working with ApiMethod.

Nested Class Summary

static class

ApiMethodHelper.MatchType

Constructor Summary

ApiMethodHelper(Class<T> apiMethodEnum, Map<String,String> aliases, List<String> nullableArguments)
Create a helper to work with a ApiMethod, using optional method aliases.

Method Summary

Map<String,Class<?>>	allArguments() Returns argument types and names used by all methods.
List<ApiMethod>	filterMethods(List<? extends ApiMethod> methods, ApiMethodHelper.MatchType matchType, String... argNames) Filters a list of methods to those that take the given set of arguments.
Map<String,Set<String>>	getAliases() Returns alias map.
List<Object>	getArguments(String name) Gets argument types and names for all overloaded methods and aliases with the given name.
List<ApiMethod>	getCandidateMethods(String name, String... argNames) Gets methods that match the given name and arguments. Note that the args list is a required subset of arguments for returned methods.
static ApiMethod	getHighestPriorityMethod(List<? extends ApiMethod> filteredMethods)
Set<String>	getMissingProperties(String methodName, Set<String> argNames) Get missing properties.
List<String>	getNullableArguments() Returns argument names that can be set to null if not specified.
Class<?>	getType(String argName) Get the type for the given argument name.
static Object	invokeMethod(Object proxy, ApiMethod method, Map<String,Object> properties) Invokes given method with argument values from given properties.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ApiMethodHelper

public ApiMethodHelper(Class<T> apiMethodEnum,
                       Map<String,String> aliases,
                       List<String> nullableArguments)

Create a helper to work with a ApiMethod, using optional method aliases.

Parameters:

apiMethodEnum - ApiMethod enumeration class

aliases - Aliases mapped to actual method names

nullableArguments - names of arguments that default to null value

Method Detail

getCandidateMethods

public List<ApiMethod> getCandidateMethods(String name,
                                           String... argNames)

Gets methods that match the given name and arguments.

Note that the args list is a required subset of arguments for returned methods.

Parameters:

name - case sensitive method name or alias to lookup

argNames - unordered required argument names

Returns:

non-null unmodifiable list of methods that take all of the given arguments, empty if there is no match

filterMethods

public List<ApiMethod> filterMethods(List<? extends ApiMethod> methods,
                                     ApiMethodHelper.MatchType matchType,
                                     String... argNames)

Filters a list of methods to those that take the given set of arguments.

Parameters:

methods - list of methods to filter

matchType - whether the arguments are an exact match, a subset or a super set of method args

argNames - argument names to filter the list

Returns:

methods with arguments that satisfy the match type.

For SUPER_SET match, if methods with exact match are found, methods that take a subset are ignored

getArguments

public List<Object> getArguments(String name)
                          throws IllegalArgumentException

Gets argument types and names for all overloaded methods and aliases with the given name.

Parameters:

name - method name, either an exact name or an alias, exact matches are checked first

Returns:

list of arguments of the form Class type1, String name1, Class type2, String name2,...

Throws:

IllegalArgumentException

getMissingProperties

public Set<String> getMissingProperties(String methodName,
                                        Set<String> argNames)

Get missing properties.

Parameters:

methodName - method name

argNames - available arguments

Returns:

Set of missing argument names

getAliases

public Map<String,Set<String>> getAliases()

Returns alias map.

Returns:

alias names mapped to method names.

allArguments

public Map<String,Class<?>> allArguments()

Returns argument types and names used by all methods.

Returns:

map with argument names as keys, and types as values

getNullableArguments

public List<String> getNullableArguments()

Returns argument names that can be set to null if not specified.

Returns:

list of argument names

getType

public Class<?> getType(String argName)
                 throws IllegalArgumentException

Get the type for the given argument name.

Parameters:

argName - argument name

Returns:

argument type

Throws:

IllegalArgumentException

getHighestPriorityMethod

public static ApiMethod getHighestPriorityMethod(List<? extends ApiMethod> filteredMethods)

invokeMethod

public static Object invokeMethod(Object proxy,
                                  ApiMethod method,
                                  Map<String,Object> properties)
                           throws RuntimeCamelException

Invokes given method with argument values from given properties.

Parameters:

proxy - Proxy object for invoke

method - method to invoke

properties - Map of arguments

Returns:

result of method invocation

Throws:

RuntimeCamelException - on errors