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Last modified by Pascal Robert on 2010/09/13 00:26
From version 3.1
edited by Pascal Robert
on 2007/09/03 14:58
Change comment: There is no comment for this version
To version 2.1
edited by smmccraw
on 2007/07/08 09:45
Change comment: There is no comment for this version

Summary

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Title
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1 -Web Applications-Development-Custom Resource Manager
1 +Programming__WebObjects-Web Applications-Development-Custom Resource Manager
Author
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1 -XWiki.probert
1 +XWiki.smmccraw
Content
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1 -=== Petite Abeille ===
1 +=== Petite Abeille ===
2 2  
3 3  Here is a little example on how to write your own WOResourceManager:
4 4  
... ... @@ -6,128 +6,127 @@
6 6  
7 7  * urlForResourceNamed simply build an URL for a resource from wherever you would like (eg a jar file). Unfortunately, urlForResourceNamed uses pathForResourceNamed so you will need to rewrite that also:
8 8  
9 -{{code}}
9 +{{panel}}
10 10  
11 - private URL urlForResourceNamed(String aResourceName)
12 - {
13 - return this.getClass().getResource( aResourceName );
14 - }
11 + private URL urlForResourceNamed(String aResourceName)
12 + {
13 + return this.getClass().getResource( aResourceName );
14 + }
15 +
16 + public String pathForResourceNamed(String aResourceName, String aFrameworkName, NSArray someLanguages)
17 + {
18 + URL anURL = this.urlForResourceNamed( aResourceName );
19 +
20 + if ( anURL !=_null_)
21 +____{
22 +______return_anURL.toExternalForm();
23 +____}
24 +____
25 +____return_null;
26 +__}
27 +__
28 +__public_String_urlForResourceNamed(String_aResourceName,_String_aFrameworkName,_NSArray_someLanguages,_WORequest_aRequest)
29 +__{
30 +____String__anURL_=_super.urlForResourceNamed(_aResourceName,_aFrameworkName,_someLanguages,_aRequest_);
31 +____
32 +____this.bytesForResourceNamed(_aResourceName,_aFrameworkName,_someLanguages_);
33 +__
34 +____return_anURL;
35 +__}
15 15  
16 - public String pathForResourceNamed(String aResourceName, String aFrameworkName, NSArray someLanguages)
17 - {
18 - URL anURL = this.urlForResourceNamed( aResourceName );
37 +{{/panel}}
19 19  
20 - if ( anURL != null )
21 - {
22 - return anURL.toExternalForm();
23 - }
39 +* //bytesForResourceNamed//simply//retrieve//a//resource//from//wherever//you//would//like//(eg//a//jar//file):
24 24  
25 - return null;
26 - }
41 +{{panel}}
27 27  
28 - public String urlForResourceNamed(String aResourceName, String aFrameworkName, NSArray someLanguages, WORequest aRequest)
29 - {
30 - String anURL = super.urlForResourceNamed( aResourceName, aFrameworkName, someLanguages, aRequest );
43 +__public_InputStream_inputStreamForResourceNamed(String_aResourceName,_String_aFrameworkName,_NSArray_someLanguages)
44 +__{
45 +____return_this.getClass().getResourceAsStream(_aResourceName_);
46 +__}
47 +__
48 +__public_byte[]_bytesForResourceNamed(String_aResourceName,_String_aFrameworkName,_NSArray_someLanguages)
49 +__{
50 +____if_(_aResourceName_!= null )
51 + {
52 + URL anURL = this.urlForResourceNamed( aResourceName );
53 +
54 + if ( anURL !=_null_)
55 +______{
56 +________String______aKey_=_anURL.toString();
57 +________WOURLValuedElementData__anElement_=_(WOURLValuedElementData)__cache.get(_aKey_);
58 +________
59 +________if_(_anElement_==_null_)
60 +________{
61 +__________synchronized(_this_)
62 +__________{
63 +____________InputStream__anInputStream_=_this.inputStreamForResourceNamed(_aResourceName,_null,_null_);
64 +____________
65 +____________if_(_anInputStream_!= null )
66 + {
67 + try
68 + {
69 + InputStream aBufferStream = new BufferedInputStream( anInputStream );
70 + byte[) someBytes = new byte( aBufferStream.available() ];
71 +
72 + aBufferStream.read( someBytes );
73 + aBufferStream.close();
74 + anInputStream.close();
75 +
76 + {
77 + Data someData = new Data( someBytes );
78 + String aType = this.contentTypeForResourceNamed( aKey );
79 +
80 + anElement = new WOURLValuedElementData( someData, aType, aKey );
81 +
82 + _cache.put( aKey, anElement );
83 + }
84 + }
85 + catch(Exception anException)
86 + {
87 + SZLog.warning( anException );
88 + }
89 + }
90 + }
91 + }
92 +
93 + return ( (Data) anElement.data() ).bytesNoCopy();
94 + }
95 +
96 + SZLog.debug( "Null url for resource named '" + aResourceName + "'." );
97 +
98 + return null;
99 + }
100 +
101 + throw new IllegalArgumentException ( "ResourceManager.bytesForResourceNamed: null resource name." );
102 + }
31 31  
32 - this.bytesForResourceNamed( aResourceName, aFrameworkName, someLanguages );
104 +{{/panel}}
33 33  
34 - return anURL;
35 - }
36 -
37 -
38 -{{/code}}
39 -
40 -* bytesForResourceNamed simply retrieve a resource from wherever you would like (eg a jar file):
41 -
42 -{{code}}
43 -
44 -public InputStream inputStreamForResourceNamed(String aResourceName, String aFrameworkName, NSArray someLanguages)
45 - {
46 - return this.getClass().getResourceAsStream( aResourceName );
47 - }
48 -
49 - public byte[] bytesForResourceNamed(String aResourceName, String aFrameworkName, NSArray someLanguages)
50 - {
51 - if ( aResourceName != null )
52 - {
53 - URL anURL = this.urlForResourceNamed( aResourceName );
54 -
55 - if ( anURL != null )
56 - {
57 - String aKey = anURL.toString();
58 - WOURLValuedElementData anElement = (WOURLValuedElementData) _cache.get( aKey );
59 -
60 - if ( anElement == null )
61 - {
62 - synchronized( this )
63 - {
64 - InputStream anInputStream = this.inputStreamForResourceNamed( aResourceName, null, null );
65 -
66 - if ( anInputStream != null )
67 - {
68 - try
69 - {
70 - InputStream aBufferStream = new BufferedInputStream( anInputStream );
71 - byte[] someBytes = new byte[ aBufferStream.available() ];
72 -
73 - aBufferStream.read( someBytes );
74 - aBufferStream.close();
75 - anInputStream.close();
76 -
77 - {
78 - Data someData = new Data( someBytes );
79 - String aType = this.contentTypeForResourceNamed( aKey );
80 -
81 - anElement = new WOURLValuedElementData( someData, aType, aKey );
82 -
83 - _cache.put( aKey, anElement );
84 - }
85 - }
86 - catch(Exception anException)
87 - {
88 - SZLog.warning( anException );
89 - }
90 - }
91 - }
92 - }
93 -
94 - return ( (Data) anElement.data() ).bytesNoCopy();
95 - }
96 -
97 - SZLog.debug( "Null url for resource named '" + aResourceName + "'." );
98 -
99 - return null;
100 - }
101 -
102 - throw new IllegalArgumentException ( "ResourceManager.bytesForResourceNamed: null resource name." );
103 - }
104 -
105 -
106 -{{/code}}
107 -
108 108  * Last but not least, you need to take care of those funky WOURLValuedElementData so dataForResourceNamed will work:
109 109  
110 -{{code}}
108 +{{panel}}
111 111  
112 -public NSData dataForResourceNamed(String aResourceName)
113 - {
114 - this.bytesForResourceNamed( aResourceName, null, null );
110 + public NSData dataForResourceNamed(String aResourceName)
111 + {
112 + this.bytesForResourceNamed( aResourceName, null, null );
113 +
114 + String aKey = this.urlForResourceNamed( aResourceName ).toString();
115 + WOURLValuedElementData anElement = (WOURLValuedElementData) _cache.get( aKey );
116 +
117 + return anElement.data();
118 + }
115 115  
116 - String aKey = this.urlForResourceNamed( aResourceName ).toString();
117 - WOURLValuedElementData anElement = (WOURLValuedElementData) _cache.get( aKey );
120 +{{/panel}}
118 118  
119 - return anElement.data();
120 - }
121 -
122 -{{/code}}
123 -
124 124  * Finally, you need to register your resource manager with WOApplication:
125 125  
126 -{{code}}
124 +{{panel}}
127 127  
128 128   anApplication.setResourceManager( new ResourceManager() );
129 129  
128 +{{/panel}}
130 130  
131 -{{/code}}
132 -
133 133  Handling of languages and frameworks are left as an exercise to the reader.
131 +
132 +Category:WebObjects