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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
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ba900596
编写于
5月 21, 2019
作者:
A
Abhijay Kumar
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差异文件
Added the prototype pattern and its unit test
上级
ee985d51
变更
6
隐藏空白更改
内联
并排
Showing
6 changed file
with
122 addition
and
0 deletion
+122
-0
src/main/java/com/designpatterns/creational/prototype/BlackColor.java
...a/com/designpatterns/creational/prototype/BlackColor.java
+13
-0
src/main/java/com/designpatterns/creational/prototype/BlueColor.java
...va/com/designpatterns/creational/prototype/BlueColor.java
+15
-0
src/main/java/com/designpatterns/creational/prototype/Color.java
...n/java/com/designpatterns/creational/prototype/Color.java
+34
-0
src/main/java/com/designpatterns/creational/prototype/ColorStore.java
...a/com/designpatterns/creational/prototype/ColorStore.java
+18
-0
src/main/java/com/designpatterns/creational/prototype/RedColor.java
...ava/com/designpatterns/creational/prototype/RedColor.java
+13
-0
src/test/java/com/designpatterns/creational/prototype/PrototypeTest.java
...om/designpatterns/creational/prototype/PrototypeTest.java
+29
-0
未找到文件。
src/main/java/com/designpatterns/creational/prototype/BlackColor.java
0 → 100644
浏览文件 @
ba900596
package
src.main.java.com.designpatterns.creational.prototype
;
class
BlackColor
extends
Color
{
BlackColor
()
{
this
.
colorName
=
"black"
;
}
@Override
public
String
addColor
()
{
return
"Black color added"
;
}
}
\ No newline at end of file
src/main/java/com/designpatterns/creational/prototype/BlueColor.java
0 → 100644
浏览文件 @
ba900596
package
src.main.java.com.designpatterns.creational.prototype
;
class
BlueColor
extends
Color
{
BlueColor
()
{
this
.
colorName
=
"blue"
;
}
@Override
public
String
addColor
()
{
return
"Blue color added"
;
}
}
src/main/java/com/designpatterns/creational/prototype/Color.java
0 → 100644
浏览文件 @
ba900596
package
src.main.java.com.designpatterns.creational.prototype
;
/**
* The prototype pattern is used when the type of objects to create is determined by a prototypical instance, which
* is cloned to produce new objects. <p>
* This pattern is used to:
* 1. avoid subclasses of an object creator in the client application, like the factory method pattern does.
* 2. avoid the inherent cost of creating a new object in the standard way (e.g., using the 'new' keyword) when it is
* prohibitively expensive for a given application.
*
* @see <a href="https://en.wikipedia.org/wiki/Prototype_pattern">Prototype Pattern</a>
*/
public
abstract
class
Color
implements
Cloneable
{
String
colorName
;
public
abstract
String
addColor
();
/**
* This method should be called from the client instead of writing code that invokes the "new" operator on a
* hard-coded class name.
*
* @return a clone for the object
*/
public
Object
clone
()
{
Object
clone
=
null
;
try
{
clone
=
super
.
clone
();
}
catch
(
CloneNotSupportedException
e
)
{
e
.
printStackTrace
();
}
return
clone
;
}
}
\ No newline at end of file
src/main/java/com/designpatterns/creational/prototype/ColorStore.java
0 → 100644
浏览文件 @
ba900596
package
src.main.java.com.designpatterns.creational.prototype
;
import
java.util.HashMap
;
import
java.util.Map
;
public
class
ColorStore
{
private
static
Map
<
String
,
Color
>
colorMap
=
new
HashMap
<>();
static
{
colorMap
.
put
(
"blue"
,
new
BlueColor
());
colorMap
.
put
(
"black"
,
new
BlackColor
());
colorMap
.
put
(
"red"
,
new
RedColor
());
}
public
static
Color
getColor
(
String
colorName
)
{
return
(
Color
)
colorMap
.
get
(
colorName
).
clone
();
}
}
src/main/java/com/designpatterns/creational/prototype/RedColor.java
0 → 100644
浏览文件 @
ba900596
package
src.main.java.com.designpatterns.creational.prototype
;
class
RedColor
extends
Color
{
RedColor
()
{
this
.
colorName
=
"red"
;
}
@Override
public
String
addColor
()
{
return
"Red color added"
;
}
}
src/test/java/com/designpatterns/creational/prototype/PrototypeTest.java
0 → 100644
浏览文件 @
ba900596
package
src.test.java.com.designpatterns.creational.prototype
;
import
org.junit.Assert
;
import
org.junit.Test
;
import
src.main.java.com.designpatterns.creational.prototype.ColorStore
;
public
class
PrototypeTest
{
@Test
public
void
testPrototype
()
{
String
testFailReason
=
""
;
String
testOne
=
ColorStore
.
getColor
(
"blue"
).
addColor
();
if
(!
"Blue color added"
.
equals
(
testOne
))
{
testFailReason
+=
"TC 1 Failed: Blue couldn't be added\n"
;
}
String
testTwo
=
ColorStore
.
getColor
(
"black"
).
addColor
();
if
(!
"Black color added"
.
equals
(
testTwo
))
{
testFailReason
+=
"TC 2 Failed: Black couldn't be added\n"
;
}
String
testThree
=
ColorStore
.
getColor
(
"red"
).
addColor
();
if
(!
"Red color added"
.
equals
(
testThree
))
{
testFailReason
+=
"TC 3 Failed: Red couldn't be added\n"
;
}
String
testFour
=
ColorStore
.
getColor
(
"blue"
).
addColor
();
if
(!
"Blue color added"
.
equals
(
testFour
))
{
testFailReason
+=
"TC 4 Failed: Blue couldn't be added\n"
;
}
Assert
.
assertEquals
(
testFailReason
,
""
,
testFailReason
);
}
}
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