[Chapter 23] 23.9 java.beans.Introspector (JDK 1.1)

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| Chapter 23 The java.beans Package |

## 23.9 java.beans.Introspector (JDK 1.1)

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The `Introspector` is a class that is never instantiated. Its static `getBeanInfo()` methods provide a way to obtain information about a Java bean, and are typically only invoked by application builders or similar tools. `getBeanInfo()` first looks for a `BeanInfo` class for the specified Java bean class. For a class named `x`, it looks for a `BeanInfo` class named `x` `BeanInfo`, first in the current package, and then in each of the packages in the `BeanInfo` search path.

If no `BeanInfo` class is found, or if the `BeanInfo` class found does not provide complete information about the bean properties, events, and methods, `getBeanInfo()` "introspects" on the bean class by using the `java.lang.reflect` package to fill in the missing information. When explicit information is provided by a `BeanInfo` class, `getBeanInfo()` treats it as definitive. When determining information through introspection, however, it examines each of the bean's superclasses in turn, looking for a `BeanInfo` class at that level or using introspection. When calling `getBeanInfo()`, you may optionally specify a second class argument that specifies a superclass for which, and above which, `getBeanInfo()` does not introspect.

    public class Introspector extends Object {
        // No Constructor
        // Class Methods
                public static String decapitalize(String name);
                public static BeanInfo getBeanInfo(Class beanClass) throws IntrospectionException;
                public static BeanInfo getBeanInfo(Class beanClass, Class stopClass) throws IntrospectionException;
                public static String[] getBeanInfoSearchPath();
                public static void setBeanInfoSearchPath(String[] path);
    }

java.beans.IntrospectionException (JDK 1.1) |  | java.beans.MethodDescriptor (JDK 1.1)