Package org.apache.calcite.util

Interface Glossary

public interface Glossary

A collection of terms.

(This is not a real class. It is here so that terms which do not map to classes can be referenced in Javadoc.)

Field Summary

Fields

Modifier and Type	Field	Description
static final @Nullable Glossary	ABSTRACT_FACTORY_PATTERN	Provide an interface for creating families of related or dependent objects without specifying their concrete classes.
static final @Nullable Glossary	ADAPTER_PATTERN	Convert the interface of a class into another interface clients expect.
static final @Nullable Glossary	BRIDGE_PATTERN	Decouple an abstraction from its implementation so that the two can very independently.
static final @Nullable Glossary	BUILDER_PATTERN	Separate the construction of a complex object from its representation so that the same construction process can create different representations.
static final @Nullable Glossary	CHAIN_OF_RESPONSIBILITY_PATTERN	Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request.
static final @Nullable Glossary	COMMAND_PATTERN	Encapsulate a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations.
static final @Nullable Glossary	COMPOSITE_PATTERN	Compose objects into tree structures to represent part-whole hierarchies.
static final @Nullable Glossary	DECORATOR_PATTERN	Attach additional responsibilities to an object dynamically.
static final @Nullable Glossary	FACADE_PATTERN	Provide a unified interface to a set of interfaces in a subsystem.
static final @Nullable Glossary	FACTORY_METHOD_PATTERN	Define an interface for creating an object, but let subclasses decide which class to instantiate.
static final @Nullable Glossary	FLYWEIGHT_PATTERN	Use sharing to support large numbers of fine-grained objects efficiently.
static final @Nullable Glossary	INTERPRETER_PATTERN	Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language.
static final @Nullable Glossary	ITERATOR_PATTERN	Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation.
static final @Nullable Glossary	MEDIATOR_PATTERN	Define an object that encapsulates how a set of objects interact.
static final @Nullable Glossary	MEMENTO_PATTERN	Without violating encapsulation, capture and externalize an objects's internal state so that the object can be restored to this state later.
static final @Nullable Glossary	OBSERVER_PATTERN	Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
static final @Nullable Glossary	PATTERN	This table shows how and where the Gang of Four patterns are applied.
static final @Nullable Glossary	PROTOTYPE_PATTERN	Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype.
static final @Nullable Glossary	PROXY_PATTERN	Provide a surrogate or placeholder for another object to control access to it.
static final @Nullable Glossary	SINGLETON_PATTERN	Ensure a class only has one instance, and provide a global point of access to it.
static final @Nullable Glossary	SQL2003	The official SQL:2003 standard (ISO/IEC 9075:2003), which is broken up into numerous parts.
static final @Nullable Glossary	SQL92	The official SQL-92 standard (ISO/IEC 9075:1992).
static final @Nullable Glossary	SQL99	The official SQL:1999 standard (ISO/IEC 9075:1999), which is broken up into five parts.
static final @Nullable Glossary	STATE_PATTERN	Allow an object to alter its behavior when its internal state changes.
static final @Nullable Glossary	STRATEGY_PATTERN	Define a family of algorithms, encapsulate each one, and make them interchangeable.
static final @Nullable Glossary	TEMPLATE_METHOD_PATTERN	Define the skeleton of an algorithm in an operation, deferring some steps to subclasses.
static final @Nullable Glossary	VISITOR_PATTERN	Represent an operation to be performed on the elements of an object structure.

Field Details

PATTERN

static final @Nullable Glossary PATTERN

This table shows how and where the Gang of Four patterns are applied. The table uses information from the GoF book and from a course on advanced object design taught by Craig Larman.

The patterns are in three groups depicting frequency of use. The patterns in light green are used frequently. Those in yellow have moderate use. Patterns in red are infrequently used. The GoF column gives the original Gang Of Four category for the pattern. The Problem and Pattern columns are from Craig's refinement of the type of problems they apply to and a refinement of the original three pattern categories.

Gang of Four Patterns

Pattern Name	GOF Category	Problem	Pattern	Often Uses	Related To
Abstract Factory	Creational	Creating Instances	Class/Interface Definition plus Inheritance	Factory Method Prototype Singleton with Facade	Factory Method Prototype Singleton
Object Adapter	Structural	Interface	Wrap One	-	Bridge Decorator Proxy
Command	Behavioral	Organization or Communication of Work Action/Response	Behavior Objects	Composite	Composite Memento Prototype
Composite	Structural	Structural Decomposition of Objects or Subsystems	Wrap Many	-	Decorator Iterator Visitor
Decorator	Structural	Instance Behavior	Wrap One	-	Object Adapter Composite Strategy
Facade	Structural	Access Control Structural Decomposition of Objects or Subsystems	Wrap Many	Singleton with Abstract Factory	Abstract Factory Mediator
Flyweight	Structural	Shared Resource Handling	Object State or Values	-	Singleton State Strategy Shareable
Iterator	Behavioral	Traversal Algorithm Access Control	Low Coupling	-	Composite Factory Method Memento
Observer	Behavioral	Event Response Organization or Communication of Work	Low Coupling	-	Mediator Singleton
Proxy	Structural	Access Control	Wrap One	-	Adapter Decorator
Singleton	Creational	Access Control	Other	-	Abstract Factory Builder Prototype
State	Behavioral	Instance Behavior	Object State or Values	Flyweight	Flyweight Singleton
Strategy	Behavioral	Single Algorithm	Behavior Objects	-	Flyweight State Template Method
Template Method	Behavioral	Single Algorithm	Class or Interface Definition plus Inheritance	-	Strategy
Class Adapter	Structural	Interface	Class or Interface Definition plus Inheritance	-	Bridge Decorator Proxy
Bridge	Structural	Implementation	Wrap One	-	Abstract Factory Class Adaptor
Builder	Creational	Creating Structures	Class or Interface Definition plus Inheritance	-	Abstract Factory Composite
Chain of Responsibility	Behavioral	Single Algorithm Organization or Communication of Work	Low Coupling	-	Composite
Factory Method	Creational	Creating Instances	Class or Interface Definition plus Inheritance	Template Method	Abstract Factory Template Method Prototype
Mediator	Behavioral	Interaction between Objects Organization or Communication of Work	Low Coupling	-	Facade Observer
Prototype	Creational	Creating Instances	Other	-	Prototype Composite Decorator
Visitor	Behavioral	Single Algorithm	Behavior Objects	-	Composite Visitor
Interpreter	Behavioral	Organization or Communication of Work	Other	-	Composite Flyweight Iterator Visitor
Memento	Behavioral	Instance Management	Object State or Values	-	Command Iterator

ABSTRACT_FACTORY_PATTERN

static final @Nullable Glossary ABSTRACT_FACTORY_PATTERN

Provide an interface for creating families of related or dependent objects without specifying their concrete classes. (See GoF.)

BUILDER_PATTERN

static final @Nullable Glossary BUILDER_PATTERN

Separate the construction of a complex object from its representation so that the same construction process can create different representations. (See GoF.)

FACTORY_METHOD_PATTERN

static final @Nullable Glossary FACTORY_METHOD_PATTERN

Define an interface for creating an object, but let subclasses decide which class to instantiate. Lets a class defer instantiation to subclasses. (See GoF.)

PROTOTYPE_PATTERN

static final @Nullable Glossary PROTOTYPE_PATTERN

Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype. (See GoF.)

SINGLETON_PATTERN

static final @Nullable Glossary SINGLETON_PATTERN

Ensure a class only has one instance, and provide a global point of access to it. (See GoF.)

Note that a common way of implementing a singleton, the so-called double-checked locking pattern, is fatally flawed in Java. Don't use it!

ADAPTER_PATTERN

static final @Nullable Glossary ADAPTER_PATTERN

Convert the interface of a class into another interface clients expect. Lets classes work together that couldn't otherwise because of incompatible interfaces. (See GoF.)

BRIDGE_PATTERN

static final @Nullable Glossary BRIDGE_PATTERN

Decouple an abstraction from its implementation so that the two can very independently. (See GoF.)

COMPOSITE_PATTERN

static final @Nullable Glossary COMPOSITE_PATTERN

Compose objects into tree structures to represent part-whole hierarchies. Lets clients treat individual objects and compositions of objects uniformly. (See GoF.)

DECORATOR_PATTERN

static final @Nullable Glossary DECORATOR_PATTERN

Attach additional responsibilities to an object dynamically. Provides a flexible alternative to subclassing for extending functionality. (See GoF.)

FACADE_PATTERN

static final @Nullable Glossary FACADE_PATTERN

Provide a unified interface to a set of interfaces in a subsystem. Defines a higher-level interface that makes the subsystem easier to use. (See GoF.)

FLYWEIGHT_PATTERN

static final @Nullable Glossary FLYWEIGHT_PATTERN

Use sharing to support large numbers of fine-grained objects efficiently. (See GoF.)

PROXY_PATTERN

static final @Nullable Glossary PROXY_PATTERN

Provide a surrogate or placeholder for another object to control access to it. (See GoF.)

CHAIN_OF_RESPONSIBILITY_PATTERN

static final @Nullable Glossary CHAIN_OF_RESPONSIBILITY_PATTERN

Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it. (See GoF.)

COMMAND_PATTERN

static final @Nullable Glossary COMMAND_PATTERN

Encapsulate a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations. (See GoF.)

INTERPRETER_PATTERN

static final @Nullable Glossary INTERPRETER_PATTERN

Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language. (See GoF.)

ITERATOR_PATTERN

static final @Nullable Glossary ITERATOR_PATTERN

Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation. (See GoF.)

MEDIATOR_PATTERN

static final @Nullable Glossary MEDIATOR_PATTERN

Define an object that encapsulates how a set of objects interact. Promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently. (See GoF.)

MEMENTO_PATTERN

static final @Nullable Glossary MEMENTO_PATTERN

Without violating encapsulation, capture and externalize an objects's internal state so that the object can be restored to this state later. (See GoF.)

OBSERVER_PATTERN

static final @Nullable Glossary OBSERVER_PATTERN

Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically. (See GoF.)

STATE_PATTERN

static final @Nullable Glossary STATE_PATTERN

Allow an object to alter its behavior when its internal state changes. The object will appear to change its class. (See GoF.)

STRATEGY_PATTERN

static final @Nullable Glossary STRATEGY_PATTERN

Define a family of algorithms, encapsulate each one, and make them interchangeable. Lets the algorithm vary independently from clients that use it. (See GoF.)

TEMPLATE_METHOD_PATTERN

static final @Nullable Glossary TEMPLATE_METHOD_PATTERN

Define the skeleton of an algorithm in an operation, deferring some steps to subclasses. Lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure. (See GoF.)

VISITOR_PATTERN

static final @Nullable Glossary VISITOR_PATTERN

Represent an operation to be performed on the elements of an object structure. Lets you define a new operation without changing the classes of the elements on which it operates. (See GoF.)

SQL92

static final @Nullable Glossary SQL92

The official SQL-92 standard (ISO/IEC 9075:1992). To reference this standard from methods that implement its rules, use the @sql.92 custom block tag in Javadoc comments; for the tag body, use the format <SectionId> [ ItemType <ItemId> ], where

• SectionId is the numbered or named section in the table of contents, e.g. "Section 4.18.9" or "Annex A"
• ItemType is one of { Table, Syntax Rule, Access Rule, General Rule, or Leveling Rule }
• ItemId is a dotted path expression to the specific item

For example,

@sql.92 Section 11.4 Syntax Rule 7.c
 

is a well-formed reference to the rule for the default character set to use for column definitions of character type.

Note that this tag is a block tag (like @see) and cannot be used inline.

SQL99

static final @Nullable Glossary SQL99

The official SQL:1999 standard (ISO/IEC 9075:1999), which is broken up into five parts. To reference this standard from methods that implement its rules, use the @sql.99 custom block tag in Javadoc comments; for the tag body, use the format <PartId> <SectionId> [ ItemType <ItemId> ], where

• PartId is the numbered part (up to Part 5)
• SectionId is the numbered or named section in the part's table of contents, e.g. "Section 4.18.9" or "Annex A"
• ItemType is one of { Table, Syntax Rule, Access Rule, General Rule, or Conformance Rule }
• ItemId is a dotted path expression to the specific item

For example,

@sql.99 Part 2 Section 11.4 Syntax Rule 7.b
 

is a well-formed reference to the rule for the default character set to use for column definitions of character type.

Note that this tag is a block tag (like @see) and cannot be used inline.

SQL2003

static final @Nullable Glossary SQL2003

The official SQL:2003 standard (ISO/IEC 9075:2003), which is broken up into numerous parts. To reference this standard from methods that implement its rules, use the @sql.2003 custom block tag in Javadoc comments; for the tag body, use the format <PartId> <SectionId> [ ItemType <ItemId> ], where

• PartId is the numbered part
• SectionId is the numbered or named section in the part's table of contents, e.g. "Section 4.11.2" or "Annex A"
• ItemType is one of { Table, Syntax Rule, Access Rule, General Rule, or Conformance Rule }
• ItemId is a dotted path expression to the specific item

For example,

@sql.2003 Part 2 Section 11.4 Syntax Rule 10.b
 

is a well-formed reference to the rule for the default character set to use for column definitions of character type.

Note that this tag is a block tag (like @see) and cannot be used inline.