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#590 Add explanation for Composite pattern

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Ilkka Seppälä
2017-08-31 22:11:58 +03:00
parent 7f1fac036e
commit f28ed7b46e
11 changed files with 117 additions and 139 deletions
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composite/etc/composite.png
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composite/etc/composite.ucls
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<?xml version="1.0" encoding="UTF-8"?>
<class-diagram version="1.1.8" icons="true" automaticImage="PNG" always-add-relationships="false" generalizations="true"
realizations="true" associations="true" dependencies="false" nesting-relationships="true">
<class id="1" language="java" name="com.iluwatar.composite.Messenger" project="composite"
file="/composite/src/main/java/com/iluwatar/composite/Messenger.java" binary="false" corner="BOTTOM_RIGHT">
<position height="124" width="247" x="118" y="180"/>
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
sort-features="false" accessors="true" visibility="true">
<attributes public="true" package="true" protected="true" private="true" static="true"/>
<operations public="true" package="true" protected="true" private="true" static="true"/>
</display>
</class>
<class id="2" language="java" name="com.iluwatar.composite.Sentence" project="composite"
file="/composite/src/main/java/com/iluwatar/composite/Sentence.java" binary="false" corner="BOTTOM_RIGHT">
<position height="124" width="157" x="118" y="407"/>
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
sort-features="false" accessors="true" visibility="true">
<attributes public="true" package="true" protected="true" private="true" static="true"/>
<operations public="true" package="true" protected="true" private="true" static="true"/>
</display>
</class>
<class id="3" language="java" name="com.iluwatar.composite.LetterComposite" project="composite"
file="/composite/src/main/java/com/iluwatar/composite/LetterComposite.java" binary="false" corner="BOTTOM_RIGHT">
<position height="177" width="176" x="405" y="180"/>
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
sort-features="false" accessors="true" visibility="true">
<attributes public="true" package="true" protected="true" private="true" static="true"/>
<operations public="true" package="true" protected="true" private="true" static="true"/>
</display>
</class>
<class id="4" language="java" name="com.iluwatar.composite.Letter" project="composite"
file="/composite/src/main/java/com/iluwatar/composite/Letter.java" binary="false" corner="BOTTOM_RIGHT">
<position height="142" width="146" x="315" y="407"/>
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
sort-features="false" accessors="true" visibility="true">
<attributes public="true" package="true" protected="true" private="true" static="true"/>
<operations public="true" package="true" protected="true" private="true" static="true"/>
</display>
</class>
<class id="5" language="java" name="com.iluwatar.composite.Word" project="composite"
file="/composite/src/main/java/com/iluwatar/composite/Word.java" binary="false" corner="BOTTOM_RIGHT">
<position height="124" width="146" x="501" y="407"/>
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
sort-features="false" accessors="true" visibility="true">
<attributes public="true" package="true" protected="true" private="true" static="true"/>
<operations public="true" package="true" protected="true" private="true" static="true"/>
</display>
</class>
<generalization id="6">
<end type="SOURCE" refId="2"/>
<end type="TARGET" refId="3"/>
</generalization>
<generalization id="7">
<end type="SOURCE" refId="4"/>
<end type="TARGET" refId="3"/>
</generalization>
<association id="8">
<end type="SOURCE" refId="3" navigable="false">
<attribute id="9" name="children"/>
<multiplicity id="10" minimum="0" maximum="2147483647"/>
</end>
<end type="TARGET" refId="3" navigable="true"/>
<display labels="true" multiplicity="true"/>
</association>
<generalization id="11">
<end type="SOURCE" refId="5"/>
<end type="TARGET" refId="3"/>
</generalization>
<classifier-display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
sort-features="false" accessors="true" visibility="true">
<attributes public="true" package="true" protected="true" private="true" static="true"/>
<operations public="true" package="true" protected="true" private="true" static="true"/>
</classifier-display>
<association-display labels="true" multiplicity="true"/>
</class-diagram>

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composite/etc/composite.urm.puml
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@startuml
package com.iluwatar.composite {
class App {
- LOGGER : Logger {static}
+ App()
+ main(args : String[]) {static}
}
class Letter {
- c : char
+ Letter(c : char)
# printThisAfter()
# printThisBefore()
}
abstract class LetterComposite {
- children : List<LetterComposite>
+ LetterComposite()
+ add(letter : LetterComposite)
+ count() : int
+ print()
# printThisAfter() {abstract}
# printThisBefore() {abstract}
}
class Messenger {
+ Messenger()
~ messageFromElves() : LetterComposite
~ messageFromOrcs() : LetterComposite
}
class Sentence {
+ Sentence(words : List<Word>)
# printThisAfter()
# printThisBefore()
}
class Word {
+ Word(letters : List<Letter>)
# printThisAfter()
# printThisBefore()
}
}
LetterComposite --> "-children" LetterComposite
Letter --|> LetterComposite
Sentence --|> LetterComposite
Word --|> LetterComposite
@enduml

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