International Business Machines Corporation

Wai Yee Peter Wong

Frank Eliot Levine

Robert Francis Berry

Riaz Yousuf Hussain

Bruce Lee Worthington

Weiming Gu

William Allan Campbell

A process and system for blocking unnecessary callbacks to empty paint methods of graphical user interface components is provided. The process initializes a platform-dependent peer class corresponding to a platform-independent class for the graphical user interface component and stores a value representing whether the platform-independent class extends a standard platform-independent class for the graphical user interface component. A platform-dependent paint method determines whether a callback to a paint method is necessary for processing of the paint event. The callback determination is performed by checking the stored value representing the extension of the standard graphics class for the component. If a callback is necessary, then the native paint method initiates a callback to the paint method of the platform-dependent peer object. The native paint method may be implemented in the C&plus;&plus; programming language, and the platform-dependent peer class and the platform-independent class may be implemented in the Java programming language.

Process and system for blocking unnecessary callbacks to empty paint methods of graphical user interface components

The present invention is directed to a system and method for modifying a class file for the purpose of instrumenting without requiring separate files to correlate the instrumentation. A class file is instrumented with hooks. Each hook is injected in a method at a critical point in the code for tracking path flow, such as where the method will be entered or exited. Each hook includes an identifier to identify the method in which it is injected. Rather than using the method's name, hooks use unique major and minor codes to identify the method. Static initializers are declared for the class to output other hooks identifying the methods being instrumented. When a class is loaded, the static initializers are executed and hooks identifying the method name and the major and minor codes for each instrumented method are output to, for instance, a trace record. Then, when a method is entered or exited, the hooks identifying the entry or exit are also outputted to a trace record. When postprocessing the trace records, class and instrumentation correlation information is available for merging from trace records in the trace stream.

System and method for instrumenting application class files with correlation information to the instrumentation

A method, system and computer program product for optimizing processing of single byte characters employed within a multibyte character encoding scheme in association with an underlying data encoding scheme employed within an operating system. The method includes: (1) receiving a data string, (2) passing the data string in its entirety to a first processing routine and (3) evaluating the data string to determine if any character in the data string is an excluded character of a host font. The method further includes (4) transferring the data string in its entirety to a second processing routine and (5) assessing a limited number of characters in the data string to determine if the data string can be converted under an underlying encoding scheme.

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Austin, TX, United States of America

Wai Yee Peter Wong