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## Package org.apache.openjpa.lib.util

General Utilities

See:
Description

Interface Summary
BytecodeWriter | Control how enhanced bytecode is written.
Clearable | Generic interface for components that can be cleared so that helpers can treat them in a generic way.
Closeable | Generic interface for components that can be closed so that helpers can treate them in a generic way.
EventManager | Basic event manager interface.
ReferenceMap | A `Map` type that can hold its keys, values, or both with weak or soft references.
ResourceBundleProvider | A simple mechanism for looking up ResourceBundle instances across different potential sources.
SizedMap | A `Map` type that maintains a maximum size, automatically removing entries when the maximum is exceeded.

Class Summary
Base16Encoder | Base 16 encoder.
Bytes | This class came from the Apache Commons Id sandbox project in support of the UUIDGenerator implementation.
CodeFormat | Encapsulates some common Java source code formatting options.
ConcreteClassGenerator | Dynamically generates concrete implementations of abstract classes.
Files | Utility operations on files.
FormatPreservingProperties | A specialization of `Properties` that stores its contents in the same order and with the same formatting as was used to read the contents from an input stream.
FormatPreservingProperties.PropertySource |
J2DoPrivHelper | Helper class to obtain the Privilege(Exception)Action object to perform Java 2 doPrivilege security sensitive function call in the following methods: AccessibleObject.setAccessible Class.forName Class.getClassLoader Class.getDeclaredField Class.getDeclaredFields Class.getDeclaredMethod Class.getDeclaredMethods Class.getProtectionDomain Class.getResource Class.newInstance ClassLoader.getParent ClassLoader.getResource ClassLoader.getResources ClassLoader.getSystemClassLoader File.deleteOnExit File.delete File.exists File.getAbsoluteFile File.getAbsolutePath File.getCanonicalPath File.listFiles File.length File.isDirectory File.mkdirs File.renameTo File.toURL FileInputStream new FileOutputStream new System.getProperties InetAddress.getByName MultiClassLoader new ServerSocket new Socket new Socket.accept System.getProperty Thread.getContextClassLoader Thread.setContextClassLoader Thread new TemporaryClassLoader new URL.openStream URLConnection.getContent ZipFile new serp.bytecode.Code new serp.bytecode.BCClassLoader new serp.bytecode.BCClass.write serp.bytecode.BCClass.getFields serp.bytecode.FieldInstruction.getField serp.bytecode.Project.loadClass AnnotatedElement.getAnnotations AnnotatedElement.getDeclaredAnnotations AnnotatedElement.isAnnotationPresent javax.validation.Validator.validate javax.validation.Validation.buildDefaultValidatorFactory If these methods are used, the following sample usage patterns should be followed to ensure proper privilege is granted:
JavaVersions | Utilities for dealing with different Java specification versions.
Localizer | The Localizer provides convenient access to localized strings.
Localizer.Message | A `Message` can provide a localized message via the `Localizer.Message.getMessage()` method call, and can also provide the original key, package, and substitution array that were used to assemble the message.
LRUMap | Extension of the commons `LRUMap` that can change its maximum size.
MultiClassLoader | Class loader type that can be configured to delegate to multiple internal class loaders.
Options | A specialization of the `Properties` map type with the added abilities to read application options from the command line and to use bean patterns to set an object's properties via command-line the stored mappings.
OrderedMap<K,V> | A Map with predictable iteration order.
ParameterTemplate | A template that allows parameter substitutions.
ReferenceHashMap | Map in which the key, value, or both may be weak/soft references.
ReferenceHashSet | A set whose values may be stored as weak or soft references.
Services | Utility classes to locate services, as defined in the Jar File Specification.
SimpleRegex | Allows for simple regex style testing of strings.
SimpleResourceBundleProvider | `ResourceBundleProvider` that uses Java's built-in resource bundle lookup methods.
StreamResourceBundleProvider | `ResourceBundleProvider` that uses the `ClassLoader.getResourceAsStream(java.lang.String)` method to load resources.
StringDistance | Utilities for calculating string distance.
TemporaryClassLoader | ClassLoader implementation that allows classes to be temporarily loaded and then thrown away.
TimestampHelper | Helper base class attempts to return java.sql.Timestamp object with nanosecond precision.
TypedProperties | A specialization of the `Properties` map type with added convenience methods to retrieve and set options as primitive values.
UUIDGenerator | UUID value generator.
ZipResourceBundleProvider | `ResourceBundleProvider` that expects the `ClassLoader.getResourceAsStream(java.lang.String)` method to return a zipped input stream.

Enum Summary
JavaVendors | Utilities for dealing with different Java vendors.

Exception Summary
FormatPreservingProperties.DuplicateKeyException |
ParseException | Exception type for parse errors.

Annotation Types Summary
Reflectable | Annotates a getter method or field so `reflection utility` to control whether the annotated member is recorded during scanning for bean-style method or field.

## Package org.apache.openjpa.lib.util Description

General Utilities

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