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1
50
51 package org.apache.avalon.meta.info.builder;
52
53 import java.io.InputStream  ;
54 import java.util.ArrayList ;
55 import java.util.Properties ;
56 import org.apache.avalon.excalibur.i18n.ResourceManager;
57 import org.apache.avalon.excalibur.i18n.Resources;
58 import org.apache.avalon.framework.Version;
59 import org.apache.avalon.framework.configuration.Configuration;
60 import org.apache.avalon.framework.configuration.ConfigurationException;
61 import org.apache.avalon.meta.ConfigurationBuilder;
62 import org.apache.avalon.meta.info.InfoDescriptor;
63 import org.apache.avalon.meta.info.ContextDescriptor;
64 import org.apache.avalon.meta.info.EntryDescriptor;
65 import org.apache.avalon.meta.info.DependencyDescriptor;
66 import org.apache.avalon.meta.info.ExtensionDescriptor;
67 import org.apache.avalon.meta.info.CategoryDescriptor;
68 import org.apache.avalon.meta.info.ReferenceDescriptor;
69 import org.apache.avalon.meta.info.ServiceDescriptor;
70 import org.apache.avalon.meta.info.StageDescriptor;
71 import org.apache.avalon.meta.info.Type;
72 import org.apache.excalibur.configuration.ConfigurationUtil;
73 import org.xml.sax.InputSource ;
74
75
82 public class XMLLegacyCreator
83 extends XMLTypeCreator
84 implements TypeCreator
85 {
86 private static final Resources REZ =
87 ResourceManager.getPackageResources( XMLLegacyCreator.class );
88
89
98 public Type createType( String implementationKey,
99 InputStream inputStream )
100 throws Exception
101 {
102 if( inputStream == null )
103 {
104 throw new NullPointerException ( "input" );
105 }
106 final InputSource input = new InputSource ( inputStream );
107 final String classname = implementationKey;
108 final Configuration xinfo = ConfigurationBuilder.build( input );
109 return build( classname, xinfo );
110 }
111
112
121 public Type createType( String classname, Configuration config )
122 throws BuildException
123 {
124 return build( classname, config );
125 }
126
127
136 private Type build( final String classname, final Configuration info )
137 throws BuildException
138 {
139 final String topLevelName = info.getName();
140 if( !topLevelName.equals( "blockinfo" ) )
141 {
142 final String message =
143 REZ.getString( "builder.bad-toplevel-block-element.error",
144 classname,
145 topLevelName );
146 throw new BuildException( message );
147 }
148
149 Configuration configuration = null;
150
151 configuration = info.getChild( "block" );
152
153 final InfoDescriptor descriptor =
154 buildInfoDescriptor( classname, configuration );
155
156 configuration = info.getChild( "loggers" );
157 final CategoryDescriptor[] loggers = new CategoryDescriptor[0];
158 final ContextDescriptor context =
159 buildPhoenixContext();
160
161 configuration = info.getChild( "services" );
162 final ServiceDescriptor[] services =
163 buildBlockServices( configuration );
164
165 configuration = info.getChild( "dependencies" );
166 final DependencyDescriptor[] dependencies =
167 buildBlockDependencies( configuration );
168
169 configuration = info.getChild( "stages" );
170 final StageDescriptor[] phases =
171 buildStages( configuration );
172
173 configuration = info.getChild( "extensions" );
174 final ExtensionDescriptor[] extensions =
175 buildExtensions( configuration );
176
177 return new Type(
178 descriptor, loggers, context, services, dependencies,
179 phases, extensions );
180 }
181
182
191 public InfoDescriptor buildInfoDescriptor(
192 final String classname, final Configuration info )
193 throws BuildException
194 {
195 final String name =
196 info.getChild( "name" ).getValue( null );
197 final String schema =
198 info.getChild( "schema-type" ).getValue( null );
199 final Version version =
200 buildVersion( info.getChild( "version" ).getValue( "1.0" ) );
201 final Properties attributes =
202 buildAttributes( info.getChild( "attributes" ) );
203 final String lifestyle = InfoDescriptor.SINGLETON;
204 return new InfoDescriptor(
205 name, classname, version, lifestyle, schema, attributes );
206 }
207
208 private ContextDescriptor buildPhoenixContext()
209 {
210 EntryDescriptor name =
211 new EntryDescriptor(
212 ContextDescriptor.NAME_KEY,
213 "java.lang.String", false, false, "block.name" );
214 EntryDescriptor partition =
215 new EntryDescriptor(
216 ContextDescriptor.PARTITION_KEY,
217 "java.lang.String", false, false, "app.name" );
218 EntryDescriptor home =
219 new EntryDescriptor(
220 ContextDescriptor.HOME_KEY,
221 "java.io.File", false, false, "app.home" );
222
223 return new ContextDescriptor( new EntryDescriptor[]{ name, partition, home } );
224 }
225
226
234 protected DependencyDescriptor[] buildBlockDependencies( final Configuration depSet )
235 throws BuildException
236 {
237 final Configuration[] deps = depSet.getChildren( "dependency" );
238 final ArrayList dependencies = new ArrayList ();
239 for( int i = 0; i < deps.length; i++ )
240 {
241 final DependencyDescriptor dependency =
242 buildBlockDependency( deps[ i ] );
243 dependencies.add( dependency );
244 }
245 return (DependencyDescriptor[])dependencies.toArray(
246 new DependencyDescriptor[ 0 ] );
247 }
248
249
250
258 protected ServiceDescriptor[] buildBlockServices( final Configuration servicesSet )
259 throws BuildException
260 {
261 final Configuration[] elements = servicesSet.getChildren( "service" );
262 final ArrayList services = new ArrayList ();
263
264 for( int i = 0; i < elements.length; i++ )
265 {
266 final ServiceDescriptor service = buildBlockService( elements[ i ] );
267 services.add( service );
268 }
269
270 return (ServiceDescriptor[])services.toArray( new ServiceDescriptor[ 0 ] );
271 }
272
273
281 protected ServiceDescriptor buildBlockService( final Configuration service )
282 throws BuildException
283 {
284 final ReferenceDescriptor designator = buildReferenceDescriptor( service );
285 final Properties attributes =
286 buildAttributes( service.getChild( "attributes" ) );
287 return new ServiceDescriptor( designator, attributes );
288 }
289
290
298 protected ReferenceDescriptor buildReferenceDescriptor( final Configuration service )
299 throws BuildException
300 {
301 try
302 {
303 final String type = service.getAttribute( "name" );
304 final String versionString = service.getAttribute( "version", "1.0" );
305 final Version version = buildVersion( versionString );
306 return new ReferenceDescriptor( type, version );
307 }
308 catch( Throwable e )
309 {
310 final String error =
311 "Error occured while attempting to build reference descriptor from legacy blockinfo configuration: "
312 + ConfigurationUtil.list( service );
313 throw new BuildException( error, e );
314 }
315 }
316
317
325 protected DependencyDescriptor buildBlockDependency( final Configuration dependency )
326 throws BuildException
327 {
328 try
329 {
330 Configuration serviceRef = dependency.getChild( "service" );
331 final ReferenceDescriptor service =
332 buildReferenceDescriptor( serviceRef );
333 final boolean optional =
334 dependency.getAttributeAsBoolean( "optional", false );
335 final Properties attributes =
336 buildAttributes( dependency.getChild( "attributes" ) );
337 String role = dependency.getChild( "role" ).getValue( null );
338
339 if( null == role ) role = service.getClassname();
341 return new DependencyDescriptor( role, service, optional, attributes );
342 }
343 catch( Throwable e )
344 {
345 final String error =
346 "Error occured while attempting to build dependency descriptor from legacy blockinfo descriptor: "
347 + ConfigurationUtil.list( dependency );
348 throw new BuildException( error, e );
349 }
350 }
351
352 }
353 |
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