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• org.apache.derby.iapi.util: Javadoc index of package org.apache.derby.iapi.util.


Package Samples:

• org.apache.derby.iapi.util

Classes:

• IdUtil: Utility class for parsing and producing string representations of ids. This class supports both delimited and un-delimited ids. The syntax for an id follows. id := delim-id | unDelim-id delim-id := "[""|[any char but quote]]+" undelim-id := (a-z|A-Z|anyunicodeletter)[a-z|A-Z|_|0-9|anyunicodeletter|anyunicodedigit]* In the syntax braces show grouping. '*' means repeat 0 or more times. '|' means or. '+' means repeat 1 or more times. In addition this class provides support for qualified names. A qualified name is a dot (.) separated list of ids. Limitations: Unicode escape sequences in ids are not ...
• JBitSet: JBitSet is a wrapper class for BitSet. It is a fixed length implementation which can be extended via the grow() method. It provides additional methods to manipulate BitSets. NOTE: JBitSet was driven by the (current and perceived) needs of the optimizer, but placed in the util package since it is not specific to query trees.. NOTE: java.util.BitSet is final, so we must provide a wrapper class which includes a BitSet member in order to extend the functionality. We want to make it look like JBitSet extends BitSet, so we need to provide wrapper methods for all of BitSet's methods.
• DoubleProperties: A properties object that links two independent properties together. The read property set is always searched first, with the write property set being second. But any put() calls are always made directly to the write object. Only the put(), keys() and getProperty() methods are supported by this class.
• ByteArray: ByteArray wraps java byte arrays (byte[]) to allow byte arrays to be used as keys in hashtables. This is required because the equals function on byte[] directly uses reference equality. This class also allows the trio of array, offset and length to be carried around as a single object.
• ReuseFactory: Factory methods for reusable objects. So far, the objects allocated by this factory are all immutable. Any immutable object can be re-used. All the methods in this class are static.
• CheapDateFormatter: This class contains static methods for formatting dates into Strings. It can be used where standard Date formatting is judged to be too expensive.
• Matchable: Provides the ability for an object to match a subset of a group of other objects. E.g in a cache.
• Operator: Provides an interface for an operator that operates on a range of objects E.g in a cache.
• StringUtil: A set of public static methods for dealing with Strings
• PropertyUtil

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