Java/ICU Internationalization Architecture

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Java/ICU Internationalization Architecture

• Mark Davis

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Summary Java / ICU

• Shared basic architecture
• Locales, resources, services, data-driven
• Same development team Java and C/C
• Core ICU4j part of Java 1.1 and later
• API syntax customized to programming language
• Cross-platform
• Fully extensible
• Thread-safe model
• Open Source ICU4j, ICU4c

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Locales

• Name, not data structure
• Language, Country, Variant
• English
• English, US
• Norwegian, Norway, Nynorsk
• Italy, Italian, Euro

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Resources

• General Purpose map Key ? Data
• Application-Specific Data
• General Services Data
• String ? String Array recurse Key ?
  Data recurse
• Java arbitrary Objects as well

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Resources Inheritance

• Find Resource
• en_us_some-varianten_usendefLang_defCountryde
  fLangroot
• Results cached

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Data

• Flexible loading structure
• Memory mapped files
• DLLs
• Simple loading

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Services

• Locale-Independent
• Unicode characters storage / access, properties
• Character conversion
• Locale or ID-Dependent