Examples of java.beans.IntrospectionException

java.beans.IntrospectionException
Thrown when an exception happens during Introspection.
Typical causes include not being able to map a string class name to a Class object, not being able to resolve a string method name, or specifying a method name that has the wrong type signature for its intended use.


        if (descriptor != null) {
            Method reader = descriptor.getReadMethod();


            if (reader == null) {
                throw new IntrospectionException("Unreadable property '"
                        + pathSegment
                        + "'");
            }


            return reader.invoke(object, null);
        }
        // note that Map has two traditional bean properties - 'empty' and 'class', so
        // do a check here only after descriptor lookup failed.
        else if (object instanceof Map) {
            return ((Map) object).get(pathSegment);
        }
        else {
            throw new IntrospectionException("No property '"
                    + pathSegment
                    + "' found in class "
                    + object.getClass().getName());
        }
    }

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        if (descriptor != null) {
            Method writer = descriptor.getWriteMethod();


            if (writer == null) {
                throw new IntrospectionException("Unwritable property '"
                        + pathSegment
                        + "'");
            }


            // do basic conversions


            value = ConverterFactory.factory
                    .getConverter(descriptor.getPropertyType())
                    .convert(value, descriptor.getPropertyType());


            // set
            writer.invoke(object, new Object[] {
                value
            });
        }
        // note that Map has two traditional bean properties - 'empty' and 'class', so
        // do a check here only after descriptor lookup failed.
        else if (object instanceof Map) {
            ((Map) object).put(pathSegment, value);
        }
        else {
            throw new IntrospectionException("No property '"
                    + pathSegment
                    + "' found in class "
                    + object.getClass().getName());
        }
    }

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        if (descriptor != null) {
            Method reader = descriptor.getReadMethod();


            if (reader == null) {
                throw new IntrospectionException("Unreadable property '"
                        + pathSegment
                        + "'");
            }


            return reader.invoke(object, null);
        }
        // note that Map has two traditional bean properties - 'empty' and 'class', so
        // do a check here only after descriptor lookup failed.
        else if (object instanceof Map) {
            return ((Map) object).get(pathSegment);
        }
        else {
            throw new IntrospectionException("No property '"
                    + pathSegment
                    + "' found in class "
                    + object.getClass().getName());
        }
    }

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        if (descriptor != null) {
            Method writer = descriptor.getWriteMethod();


            if (writer == null) {
                throw new IntrospectionException("Unwritable property '"
                        + pathSegment
                        + "'");
            }


            // do basic conversions


            value = ConverterFactory.factory
                    .getConverter(descriptor.getPropertyType())
                    .convert(value, descriptor.getPropertyType());


            // set
            writer.invoke(object, new Object[] {
                value
            });
        }
        // note that Map has two traditional bean properties - 'empty' and 'class', so
        // do a check here only after descriptor lookup failed.
        else if (object instanceof Map) {
            ((Map) object).put(pathSegment, value);
        }
        else {
            throw new IntrospectionException("No property '"
                    + pathSegment
                    + "' found in class "
                    + object.getClass().getName());
        }
    }

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    {
      throw new NullPointerException("PropertyDescriptor must not be null.");
    }
    if (pd.getPropertyEditorClass() == null)
    {
      throw new IntrospectionException("Property has no editor.");
    }
    this.propertyDescriptor = pd;
    this.propertyEditor = createPropertyEditor(pd);
  }

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    {
      return (PropertyEditor) c.newInstance();
    }
    catch (Exception e)
    {
      throw new IntrospectionException("Unable to create PropertyEditor.");
    }
  }

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            throws IntrospectionException {


        super(propertyName, null, null);
        
        if (propertyName == null || propertyName.length() == 0) {
            throw new IntrospectionException("bad property name: " +
                    propertyName + " on class: " + beanClass.getClass().getName());
        }


        setName(propertyName);
        String base = capitalizePropertyName(propertyName);
        
        // Look for mapped read method and matching write method
        try {
            try {
                mappedReadMethod = getMethod(beanClass, "get" + base,
                        STRING_CLASS_PARAMETER);
            } catch (IntrospectionException e) {
                mappedReadMethod = getMethod(beanClass, "is" + base,
                        STRING_CLASS_PARAMETER);
            }
            Class[] params = { String.class, mappedReadMethod.getReturnType() };
            mappedWriteMethod = getMethod(beanClass, "set" + base, params);
        } catch (IntrospectionException e) {
            /* Swallow IntrospectionException
             * TODO: Why?
             */
        }
        
        // If there's no read method, then look for just a write method 
        if (mappedReadMethod == null) {
            mappedWriteMethod = getMethod(beanClass, "set" + base, 2);
        }


        if ((mappedReadMethod == null) && (mappedWriteMethod == null)) {
            throw new IntrospectionException("Property '" + propertyName +
                    "' not found on " +
                    beanClass.getName());
        }
        
        findMappedPropertyType();

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            throws IntrospectionException {


        super(propertyName, null, null);


        if (propertyName == null || propertyName.length() == 0) {
            throw new IntrospectionException("bad property name: " +
                    propertyName);
        }
        setName(propertyName);


        // search the mapped get and set methods

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            throws IntrospectionException {


        super(propertyName, mappedGetter, mappedSetter);


        if (propertyName == null || propertyName.length() == 0) {
            throw new IntrospectionException("bad property name: " +
                    propertyName);
        }


        setName(propertyName);
        mappedReadMethod = mappedGetter;

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    private void findMappedPropertyType() throws IntrospectionException {
        try {
            mappedPropertyType = null;
            if (mappedReadMethod != null) {
                if (mappedReadMethod.getParameterTypes().length != 1) {
                    throw new IntrospectionException
                            ("bad mapped read method arg count");
                }
                mappedPropertyType = mappedReadMethod.getReturnType();
                if (mappedPropertyType == Void.TYPE) {
                    throw new IntrospectionException
                            ("mapped read method " +
                            mappedReadMethod.getName() + " returns void");
                }
            }


            if (mappedWriteMethod != null) {
                Class[] params = mappedWriteMethod.getParameterTypes();
                if (params.length != 2) {
                    throw new IntrospectionException
                            ("bad mapped write method arg count");
                }
                if (mappedPropertyType != null &&
                        mappedPropertyType != params[1]) {
                    throw new IntrospectionException
                            ("type mismatch between mapped read and write methods");
                }
                mappedPropertyType = params[1];
            }
        } catch (IntrospectionException ex) {

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