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Java > Open Source Codes > org > jboss > deployers > plugins > deployers > helpers > SchemaResolverDeployer


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2006, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */

22 package org.jboss.deployers.plugins.deployers.helpers;
23
24 import java.io.InputStream JavaDoc;
25
26 import org.jboss.deployers.spi.DeploymentException;
27 import org.jboss.deployers.spi.deployer.DeploymentUnit;
28 import org.jboss.virtual.VirtualFile;
29 import org.jboss.xb.binding.Unmarshaller;
30 import org.jboss.xb.binding.UnmarshallerFactory;
31 import org.jboss.xb.binding.sunday.unmarshalling.SchemaBindingResolver;
32 import org.jboss.xb.binding.sunday.unmarshalling.SingletonSchemaResolverFactory;
33
34 /**
35  * SchemaResolverDeployer.
36  *
37  * @param <T> the expected type
38  * @author <a HREF="adrian@jboss.com">Adrian Brock</a>
39  * @version $Revision: 1.1 $
40  */

41 public abstract class SchemaResolverDeployer<T> extends AbstractParsingDeployer<T>
42 {
43    /** Unmarshaller factory */
44    private static final UnmarshallerFactory factory = UnmarshallerFactory.newInstance();
45
46    /** The resolver */
47    private static final SchemaBindingResolver resolver = SingletonSchemaResolverFactory.getInstance().getSchemaBindingResolver();
48    
49    /**
50     * Create a new SchemaResolverDeployer.
51     *
52     * @param deploymentType the deployment type
53     * @throws IllegalArgumentException for a null deployment type
54     */

55    public SchemaResolverDeployer(Class JavaDoc<T> deploymentType)
56    {
57       super(deploymentType);
58    }
59
60    /**
61     * Parse a deployment
62     *
63     * @param unit the deployment unit
64     * @param file the metadata file
65     * @param root - possibly null pre-existing root
66     * @return the metadata
67     * @throws Exception for any error
68     */

69    protected T parse(DeploymentUnit unit, VirtualFile file, T root) throws Exception JavaDoc
70    {
71       if (file == null)
72          throw new IllegalArgumentException JavaDoc("Null file");
73
74       log.debug("Parsing file: "+file+" for deploymentType: "+getDeploymentType());
75       Unmarshaller unmarshaller = factory.newUnmarshaller();
76       InputStream JavaDoc is = file.openStream();
77       Object JavaDoc parsed = null;
78       try
79       {
80          parsed = unmarshaller.unmarshal(is, resolver);
81          log.debug("Parsed file: "+file+" to: "+parsed);
82       }
83       finally
84       {
85          try
86          {
87             is.close();
88          }
89          catch (Exception JavaDoc ignored)
90          {
91          }
92       }
93       if (parsed == null)
94          throw new DeploymentException("The xml " + file.getPathName() + " is not well formed!");
95
96       return getDeploymentType().cast(parsed);
97    }
98 }
99
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