系统类图.md~

java实现的简单文件系统,可以实现一般文件系统的基本操作,并赋有系统类图

(object Petal
    version    	50
    _written   	"Rose 2006.0.0.060314"
    charSet    	134)

(object Design "Logical View"
    is_unit    	TRUE
    is_loaded  	TRUE
    attributes 	(list Attribute_Set
	(object Attribute
	    tool       	"Java"
	    name       	"IDE"
	    value      	"Internal Editor")
	(object Attribute
	    tool       	"Java"
	    name       	"UserDefineTagName1"
	    value      	"")
	(object Attribute
	    tool       	"Java"
	    name       	"UserDefineTagText1"
	    value      	"")
	(object Attribute
	    tool       	"Java"
	    name       	"UserDefineTagApply1"
	    value      	"")
	(object Attribute
	    tool       	"Java"
	    name       	"UserDefineTagName2"
	    value      	"")
	(object Attribute
	    tool       	"Java"
	    name       	"UserDefineTagText2"
	    value      	"")
	(object Attribute
	    tool       	"Java"
	    name       	"UserDefineTagApply2"
	    value      	"")
	(object Attribute
	    tool       	"Java"
	    name       	"UserDefineTagName3"
	    value      	"")
	(object Attribute
	    tool       	"Java"
	    name       	"UserDefineTagText3"
	    value      	"")
	(object Attribute
	    tool       	"Java"
	    name       	"UserDefineTagApply3"
	    value      	""))
    quid       	"486358A4009C"
    enforceClosureAutoLoad 	FALSE
    defaults   	(object defaults
	rightMargin 	0.250000
	leftMargin 	0.250000
	topMargin  	0.250000
	bottomMargin 	0.500000
	pageOverlap 	0.250000
	clipIconLabels 	TRUE
	autoResize 	TRUE
	snapToGrid 	TRUE
	gridX      	0
	gridY      	0
	defaultFont 	(object Font
	    size       	10
	    face       	"Arial"
	    bold       	FALSE
	    italics    	FALSE
	    underline  	FALSE
	    strike     	FALSE
	    color      	0
	    default_color 	TRUE)
	showMessageNum 	3
	showClassOfObject 	TRUE
	notation   	"Unified")
    root_usecase_package 	(object Class_Category "Use Case View"
	quid       	"486358A4009E"
	exportControl 	"Public"
	global     	TRUE
	logical_models 	(list unit_reference_list
	    (object Class "VDBlock"
		quid       	"4863594102FD"
		used_nodes 	(list uses_relationship_list
		    (object Uses_Relationship
			quid       	"4863595A0399"
			stereotype 	"composite"
			supplier   	"Use Case View::VDisk"
			quidu      	"4863594C004E"
			supplier_cardinality 	(value cardinality "1")
			client_cardinality 	(value cardinality "1..n"))
		    (object Uses_Relationship
			quid       	"48635BCC0242"
			supplier   	"Use Case View::VDB"
			quidu      	"48635A67007D")))
	    (object Class "VDisk"
		quid       	"4863594C004E")
	    (object Class "VFile"
		quid       	"48635A5D034B"
		used_nodes 	(list uses_relationship_list
		    (object Uses_Relationship
			quid       	"48635B5E0251"
			label      	"build on"
			supplier   	"Use Case View::VFS"
			quidu      	"48635B510399"
			supplier_cardinality 	(value cardinality "1")
			client_cardinality 	(value cardinality "0..n")))
		operations 	(list Operations
		    (object Operation "read"
			quid       	"48635A82006D"
			result     	"Boolean"
			concurrency 	"Sequential"
			opExportControl 	"Public"
			uid        	0)
		    (object Operation "write"
			quid       	"48635A87032C"
			result     	"Boolean"
			concurrency 	"Sequential"
			opExportControl 	"Public"
			uid        	0)
		    (object Operation "seek"
			quid       	"48635A8C0148"
			result     	"ArrayList<Integer>"
			concurrency 	"Sequential"
			opExportControl 	"Public"
			uid        	0))
		class_attributes 	(list class_attribute_list
		    (object ClassAttribute "fcb"
			quid       	"48635C34032C"
			type       	"FCB"
			exportControl 	"Protected")
		    (object ClassAttribute "name"
			quid       	"48635C72033C"
			type       	"String"
			exportControl 	"Protected")
		    (object ClassAttribute "path"
			quid       	"48635C8B0186"
			type       	"String"
			exportControl 	"Protected")
		    (object ClassAttribute "isForD"
			quid       	"48635C970242"
			type       	"char")
		    (object ClassAttribute "parent"
			quid       	"48635CCC036B"
			type       	"VFile"
			quidu      	"48635A5D034B")
		    (object ClassAttribute "vfs"
			quid       	"48635D3C0290"
			type       	"VFS"
			quidu      	"48635B510399"
			exportControl 	"Protected")))
	    (object Class "VDB"
		quid       	"48635A67007D"
		superclasses 	(list inheritance_relationship_list
		    (object Inheritance_Relationship
			quid       	"48635A7103D8"
			supplier   	"Use Case View::VFile"
			quidu      	"48635A5D034B"))
		operations 	(list Operations
		    (object Operation "readRecord"
			quid       	"48635B12003E"
			concurrency 	"Sequential"
			opExportControl 	"Public"
			uid        	0)
		    (object Operation "writeRecord"
			quid       	"48635B1A029F"
			concurrency 	"Sequential"
			opExportControl 	"Public"
			uid        	0))
		class_attributes 	(list class_attribute_list
		    (object ClassAttribute "records"
			quid       	"48635D6D0271"
			type       	"ArrayList<Record>")))
	    (object Class "VFS"
		quid       	"48635B510399"
		used_nodes 	(list uses_relationship_list
		    (object Uses_Relationship
			quid       	"486367DB032C"
			label      	"build on"
			supplier   	"Use Case View::VDisk"
			quidu      	"4863594C004E"
			supplier_cardinality 	(value cardinality "1")
			client_cardinality 	(value cardinality "0..n"))))
	    (object Class "Record"
		quid       	"48635D8C00BB"
		used_nodes 	(list uses_relationship_list
		    (object Uses_Relationship
			quid       	"48635DD00203"
			supplier   	"Use Case View::VDB"
			quidu      	"48635A67007D"))
		class_attributes 	(list class_attribute_list
		    (object ClassAttribute "key"
			quid       	"48635D9A02DE"
			type       	"String")
		    (object ClassAttribute "value"
			quid       	"48635DA800EA"
			type       	"ArrayList<Character>")))
	    (object Class "NewInSecterface"
		quid       	"4864685900EA"
		stereotype 	"Interface")
	    (object Class "NewInterface"
		quid       	"4864694A031C"
		stereotype 	"Interface")
	    (object Class "Error"
		quid       	"48646995031C")
	    (object Class "AssertFailureError"
		quid       	"486469A00222"
		superclasses 	(list inheritance_relationship_list
		    (object Inheritance_Relationship
			quid       	"486469AE0203"
			supplier   	"Use Case View::Error"
			quidu      	"48646995031C")))
	    (object Class "Secure"
		quid       	"486469B502BF"
		used_nodes 	(list uses_relationship_list
		    (object Uses_Relationship
			quid       	"486469BF0251"
			label      	"use"
			supplier   	"Use Case View::AssertFailureError"
			quidu      	"486469A00222")))
	    (object Association "$UNNAMED$0"
		quid       	"4863597901C5"
		roles      	(list role_list
		    (object Role "$UNNAMED$1"
			quid       	"4863597A008C"
			supplier   	"Use Case View::VDisk"
			quidu      	"4863594C004E"
			is_aggregate 	TRUE)
		    (object Role "$UNNAMED$2"
			quid       	"4863597A008E"
			supplier   	"Use Case View::VDBlock"
			quidu      	"4863594102FD")))
	    (object Association "$UNNAMED$3"
		quid       	"486359F303B9"
		roles      	(list role_list
		    (object Role "$UNNAMED$4"
			quid       	"486359F402FD"
			supplier   	"Use Case View::VDisk"
			quidu      	"4863594C004E")
		    (object Role "$UNNAMED$5"
			quid       	"486359F402FF"
			supplier   	"Use Case View::VDBlock"
			quidu      	"4863594102FD")))
	    (object Association "$UNNAMED$6"
		quid       	"48635DDA003E"
		roles      	(list role_list
		    (object Role "$UNNAMED$7"
			quid       	"48635DDA032C"
			supplier   	"Use Case View::VDB"
			quidu      	"48635A67007D"
			client_cardinality 	(value cardinality "1")
			exportControl 	"Protected"
			is_aggregate 	TRUE)
		    (object Role "$UNNAMED$8"
			quid       	"48635DDA033C"
			supplier   	"Use Case View::Record"
			quidu      	"48635D8C00BB"
			client_cardinality 	(value cardinality "0..n")))))
	logical_presentations 	(list unit_reference_list
	    (object UseCaseDiagram "Main"
		quid       	"486358B402DF"
		title      	"Main"
		zoom       	100
		max_height 	28350
		max_width  	21600
		origin_x   	0
		origin_y   	0
		items      	(list diagram_item_list))
	    (object ClassDiagram "VFileSystem"
		quid       	"4863592C037A"
		title      	"VFileSystem"
		zoom       	100
		max_height 	28350
		max_width  	21600
		origin_x   	0
		origin_y   	0
		items      	(list diagram_item_list
		    (object ClassView "Class" "Use Case View::VDBlock" @1
			ShowCompartmentStereotypes 	TRUE
			IncludeAttribute 	TRUE
			IncludeOperation 	TRUE
			location   	(1216, 534)
			font       	(object Font
			    size       	10
			    face       	"Arial"
			    bold       	FALSE
			    italics    	FALSE
			    underline  	FALSE
			    strike     	FALSE
			    color      	0
			    default_color 	TRUE)
			label      	(object ItemLabel
			    Parent_View 	@1
			    location   	(1121, 483)
			    fill_color 	13434879
			    nlines     	1
			    max_width  	190
			    justify    	0
			    label      	"VDBlock")
			icon_style 	"Icon"
			line_color 	3342489
			fill_color 	13434879
			quidu      	"4863594102FD"
			width      	208
			height     	126
			annotation 	8
			autoResize 	TRUE)
		    (object ClassView "Class" "Use Case View::VDisk" @2
			ShowCompartmentStereotypes 	TRUE
			IncludeAttribute 	TRUE
			IncludeOperation 	TRUE
			location   	(1844, 736)
			font       	(object Font
			    size       	10
			    face       	"Arial"
			    bold       	FALSE
			    italics    	FALSE
			    underline  	FALSE
			    strike     	FALSE
			    color      	0
			    default_color 	TRUE)
			label      	(object ItemLabel
			    Parent_View 	@2
			    location   	(1763, 685)
			    fill_color 	13434879
			    nlines     	1
			    max_width  	162
			    justify    	0
			    label      	"VDisk")
			icon_style 	"Icon"
			line_color 	3342489
			fill_color 	13434879
			quidu      	"4863594C004E"
			height     	126
			annotation 	8
			autoResize 	TRUE)
		    (object UsesView "" @3
			font       	(object Font
			    size       	10
			    face       	"Arial"
			    bold       	FALSE
			    italics    	FALSE
			    underline  	FALSE
			    strike     	FALSE
			    color      	0
			    default_color 	TRUE)
			stereotype 	(object SegLabel @4
			    Parent_View 	@3
			    location   	(1572, 523)
			    font       	(object Font
				size       	10
				face       	"Arial"
				bold       	FALSE
				italics    	FALSE
				underline  	FALSE
				strike     	FALSE
				color      	0
				default_color 	TRUE)
			    anchor     	10
			    anchor_loc 	1
			    nlines     	1
			    max_width  	450
			    justify    	0
			    label      	"<<composite>>"
			    pctDist    	0.500000
			    height     	120
			    orientation 	0)
			line_color 	3342489
			quidu      	"4863595A0399"
			client     	@1
			supplier   	@2
			vertices   	(list Points
			    (1320, 567)
			    (1753, 705))
			line_style 	0)
		    (object ClassView "Class" "Use Case View::VFile" @5
			ShowCompartmentStereotypes 	TRUE
			IncludeAttribute 	TRUE
			IncludeOperation 	TRUE
			location   	(772, 1009)
			font       	(object Font
			    size       	10
			    face       	"Arial"
			    bold       	FALSE
			    italics    	FALSE
			    underline  	FALSE
			    strike     	FALSE
			    color      	0
			    default_color 	TRUE)
			label      	(object ItemLabel
			    Parent_View 	@5
			    location   	(624, 728)
			    fill_color 	13434879
			    nlines     	1
			    max_width  	296
			    justify    	0
			    label      	"VFile")
			icon_style 	"Icon"
			line_color 	3342489
			fill_color 	13434879
			quidu      	"48635A5D034B"
			compartment 	(object Compartment
			    Parent_View 	@5
			    location   	(624, 789)
			    font       	(object Font
				size       	10
				face       	"Arial"
				bold       	FALSE
				italics    	FALSE
				underline  	FALSE
				strike     	FALSE
				color      	0
				default_color 	TRUE)
			    icon_style 	"Icon"
			    fill_color 	13434879
			    anchor     	2
			    nlines     	10
			    max_width  	303
			    justify    	1)
			width      	314
			height     	586
			annotation 	8
			autoResize 	TRUE)
		    (object ClassView "Class" "Use Case View::VFS" @6
			ShowCompartmentStereotypes 	TRUE
			IncludeAttribute 	TRUE
			IncludeOperation 	TRUE
			location   	(1462, 1008)
			font       	(object Font
			    size       	10
			    face       	"Arial"
			    bold       	FALSE
			    italics    	FALSE
			    underline  	FALSE
			    strike     	FALSE
			    color      	0
			    default_color 	TRUE)
			label      	(object ItemLabel
			    Parent_View 	@6
			    location   	(1381, 957)
			    fill_color 	13434879
			    nlines     	1
			    max_width  	162
			    justify    	0
			    label      	"VFS")
			icon_style 	"Icon"
			line_color 	3342489
			fill_color 	13434879
			quidu      	"48635B510399"
			height     	126
			annotation 	8
			autoResize 	TRUE)
		    (object UsesView "build on" @7
			font       	(object Font
			    size       	10
			    face       	"Arial"
			    bold       	FALSE
			    italics    	FALSE
			    underline  	FALSE
			    strike     	FALSE
			    color      	0
			    default_color 	TRUE)
			label      	(object SegLabel @8
			    Parent_View 	@7
			    location   	(1161, 970)
			    font       	(object Font
				size       	10
				face       	"Arial"
				bold       	FALSE
				italics    	TRUE
				underline  	FALSE
				strike     	FALSE
				color      	0