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java-design-patterns
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af1b6111
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java-design-patterns
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体验新版 GitCode,发现更多精彩内容 >>
提交
af1b6111
编写于
10月 13, 2020
作者:
R
Rakesh Venkatesh
浏览文件
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电子邮件补丁
差异文件
code refactor
上级
4ff196ce
变更
3
显示空白变更内容
内联
并排
Showing
3 changed file
with
21 addition
and
23 deletion
+21
-23
command/src/main/java/com/iluwatar/command/App.java
command/src/main/java/com/iluwatar/command/App.java
+4
-6
command/src/main/java/com/iluwatar/command/Goblin.java
command/src/main/java/com/iluwatar/command/Goblin.java
+0
-17
command/src/main/java/com/iluwatar/command/Target.java
command/src/main/java/com/iluwatar/command/Target.java
+17
-0
未找到文件。
command/src/main/java/com/iluwatar/command/App.java
浏览文件 @
af1b6111
...
@@ -30,12 +30,10 @@ package com.iluwatar.command;
...
@@ -30,12 +30,10 @@ package com.iluwatar.command;
*
*
* <p>Four terms always associated with the command pattern are command, receiver, invoker and
* <p>Four terms always associated with the command pattern are command, receiver, invoker and
* client. A command object (spell) knows about the receiver (target) and invokes a method of the
* client. A command object (spell) knows about the receiver (target) and invokes a method of the
* receiver. Values for parameters of the receiver method are stored in the command. The receiver
* receiver. An invoker object (wizard) receives a reference to the command to be executed and
* then does the work. An invoker object (wizard) knows how to execute a command, and optionally
* optionally does bookkeeping about the command execution. The invoker does not know anything
* does bookkeeping about the command execution. The invoker does not know anything about a is
* about how the command is executed. The client decides which commands to execute at which
* executed. Both an invoker object and several command
* points. To execute a command, it passes a reference of the function to the invoker object.
* objects are held by a client object (app). The client decides which commands to execute at which
* points. To execute a command, it passes a reference of the command object to the invoker object.
*
*
* <p>In other words, in this example the wizard casts spells on the goblin. The wizard keeps track
* <p>In other words, in this example the wizard casts spells on the goblin. The wizard keeps track
* of the previous spells cast, so it is easy to undo them. In addition, the wizard keeps track of
* of the previous spells cast, so it is easy to undo them. In addition, the wizard keeps track of
...
...
command/src/main/java/com/iluwatar/command/Goblin.java
浏览文件 @
af1b6111
...
@@ -42,21 +42,4 @@ public class Goblin extends Target {
...
@@ -42,21 +42,4 @@ public class Goblin extends Target {
public
String
toString
()
{
public
String
toString
()
{
return
"Goblin"
;
return
"Goblin"
;
}
}
/**
* changeSize.
*/
public
void
changeSize
()
{
var
oldSize
=
getSize
()
==
Size
.
NORMAL
?
Size
.
SMALL
:
Size
.
NORMAL
;
setSize
(
oldSize
);
}
/**
* changeVisibility.
*/
public
void
changeVisibility
()
{
var
visible
=
getVisibility
()
==
Visibility
.
INVISIBLE
?
Visibility
.
VISIBLE
:
Visibility
.
INVISIBLE
;
setVisibility
(
visible
);
}
}
}
command/src/main/java/com/iluwatar/command/Target.java
浏览文件 @
af1b6111
...
@@ -62,4 +62,21 @@ public abstract class Target {
...
@@ -62,4 +62,21 @@ public abstract class Target {
public
void
printStatus
()
{
public
void
printStatus
()
{
LOGGER
.
info
(
"{}, [size={}] [visibility={}]"
,
this
,
getSize
(),
getVisibility
());
LOGGER
.
info
(
"{}, [size={}] [visibility={}]"
,
this
,
getSize
(),
getVisibility
());
}
}
/**
* Changes the size of the target.
*/
public
void
changeSize
()
{
var
oldSize
=
getSize
()
==
Size
.
NORMAL
?
Size
.
SMALL
:
Size
.
NORMAL
;
setSize
(
oldSize
);
}
/**
* Changes the visibility of the target.
*/
public
void
changeVisibility
()
{
var
visible
=
getVisibility
()
==
Visibility
.
INVISIBLE
?
Visibility
.
VISIBLE
:
Visibility
.
INVISIBLE
;
setVisibility
(
visible
);
}
}
}
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