IntrospectionUtils (Apache Tomcat 8.5.57 API Documentation)

org.apache.tomcat.util

## Class IntrospectionUtils

- java.lang.Object
- - org.apache.tomcat.util.IntrospectionUtils

-     public final class IntrospectionUtils
      extends Object

  Utils for introspection and reflection

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static interface` | `IntrospectionUtils.PropertySource`
    `static interface` | `IntrospectionUtils.SecurePropertySource`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `IntrospectionUtils()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static Object` | `callMethod1(Object target, String methodN, Object param1, String typeParam1, ClassLoader cl)`
    `static Object` | `callMethodN(Object target, String methodN, Object[] params, Class<?>[] typeParams)`
    `static String` | `capitalize(String name)` Reverse of Introspector.decapitalize.
    `static void` | `clear()`
    `static Object` | `convert(String object, Class<?> paramType)`
    `static Method` | `findMethod(Class<?> c, String name, Class<?>[] params)`
    `static Method[]` | `findMethods(Class<?> c)`
    `static Object` | `getProperty(Object o, String name)`
    `static boolean` | `isInstance(Class<?> clazz, String type)` Checks to see if the specified class is an instance of or assignable from the specified type.
    `static String` | `replaceProperties(String value, Hashtable<Object,Object> staticProp, IntrospectionUtils.PropertySource[] dynamicProp)` Deprecated. Use `replaceProperties(String, Hashtable, PropertySource[], ClassLoader)`
    `static String` | `replaceProperties(String value, Hashtable<Object,Object> staticProp, IntrospectionUtils.PropertySource[] dynamicProp, ClassLoader classLoader)` Replace ${NAME} with the property value.
    `static boolean` | `setProperty(Object o, String name, String value)` Find a method with the right name If found, call the method ( if param is int or boolean we'll convert value to the right type before) - that means you can have setDebug(1).
    `static boolean` | `setProperty(Object o, String name, String value, boolean invokeSetProperty)`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### IntrospectionUtils

          public IntrospectionUtils()

  - ### Method Detail

    - #### setProperty

          public static boolean setProperty(Object o,
                            String name,
                            String value)

      Find a method with the right name If found, call the method ( if param is int or boolean we'll convert value to the right type before) - that means you can have setDebug(1).
      Parameters:
        `o` - The object to set a property on
        `name` - The property name
        `value` - The property value
      Returns:
        `true` if operation was successful

    - #### setProperty

          public static boolean setProperty(Object o,
                            String name,
                            String value,
                            boolean invokeSetProperty)

    - #### getProperty

          public static Object getProperty(Object o,
                           String name)

    - #### replaceProperties

          @Deprecated
          public static String replaceProperties(String value,
                                            Hashtable<Object,Object> staticProp,
                                            IntrospectionUtils.PropertySource[] dynamicProp)

      Deprecated. Use `replaceProperties(String, Hashtable, PropertySource[], ClassLoader)`
      Replaces ${NAME} in the value with the value of the property 'NAME'. Replaces ${NAME:DEFAULT} with the value of the property 'NAME:DEFAULT', if the property 'NAME:DEFAULT' is not set, the expression is replaced with the value of the property 'NAME', if the property 'NAME' is not set, the expression is replaced with 'DEFAULT'. If the property is not set and there is no default the value will be returned unmodified.
      Parameters:
        `value` - The value
        `staticProp` - Replacement properties
        `dynamicProp` - Replacement properties
      Returns:
        the replacement value

    - #### replaceProperties

          public static String replaceProperties(String value,
                                 Hashtable<Object,Object> staticProp,
                                 IntrospectionUtils.PropertySource[] dynamicProp,
                                 ClassLoader classLoader)

      Replace ${NAME} with the property value.
      Parameters:
        `value` - The value
        `staticProp` - Replacement properties
        `dynamicProp` - Replacement properties
        `classLoader` - Class loader associated with the code requesting the property
      Returns:
        the replacement value

    - #### capitalize

          public static String capitalize(String name)

      Reverse of Introspector.decapitalize.
      Parameters:
        `name` - The name
      Returns:
        the capitalized string

    - #### clear

          public static void clear()

    - #### findMethods

          public static Method[] findMethods(Class<?> c)

    - #### findMethod

          public static Method findMethod(Class<?> c,
                          String name,
                          Class<?>[] params)

    - #### callMethod1

          public static Object callMethod1(Object target,
                           String methodN,
                           Object param1,
                           String typeParam1,
                           ClassLoader cl)
                                    throws Exception

      Throws:
        `Exception`

    - #### callMethodN

          public static Object callMethodN(Object target,
                           String methodN,
                           Object[] params,
                           Class<?>[] typeParams)
                                    throws Exception

      Throws:
        `Exception`

    - #### convert

          public static Object convert(String object,
                       Class<?> paramType)

    - #### isInstance

          public static boolean isInstance(Class<?> clazz,
                           String type)

      Checks to see if the specified class is an instance of or assignable from the specified type. The class `clazz`, all its superclasses, interfaces and those superinterfaces are tested for a match against the type name `type`. This is similar to `instanceof` or `Class.isAssignableFrom(java.lang.Class<?>)` except that the target type will not be resolved into a Class object, which provides some security and memory benefits.
      Parameters:
        `clazz` - The class to test for a match.
        `type` - The name of the type that `clazz` must be.
      Returns:
        `true` if the `clazz` tested is an instance of the specified `type`, `false` otherwise.

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