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Java > Open Source Codes > org > jboss > axis > encoding > ser > DeferredBeanConstruction


1 /*
2  * The Apache Software License, Version 1.1
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15  * notice, this list of conditions and the following disclaimer in
16  * the documentation and/or other materials provided with the
17  * distribution.
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20  * if any, must include the following acknowledgment:
21  * "This product includes software developed by the
22  * Apache Software Foundation (http://www.apache.org/)."
23  * Alternately, this acknowledgment may appear in the software itself,
24  * if and wherever such third-party acknowledgments normally appear.
25  *
26  * 4. The names "Axis" and "Apache Software Foundation" must
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28  * software without prior written permission. For written
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54
55 package org.jboss.axis.encoding.ser;
56
57 import org.jboss.axis.utils.JavaUtils;
58 import org.jboss.logging.Logger;
59
60 import java.lang.reflect.Constructor JavaDoc;
61 import java.util.ArrayList JavaDoc;
62 import java.util.List JavaDoc;
63
64 /**
65  * This is the constructor we find in startElement if the bean does not have a default constructor.
66  *
67  * Wraps the defered ctor and its arguments
68  *
69  * @author Thomas.Diesler@jboss.org
70  */

71 public class DeferredBeanConstruction
72 {
73    private static Logger log = Logger.getLogger(DeferredBeanConstruction.class.getName());
74
75    private Constructor JavaDoc ctor;
76
77    private Class JavaDoc[] ctorParamTypes;
78
79    private List JavaDoc ctorParams = new ArrayList JavaDoc();
80
81    public DeferredBeanConstruction(Constructor JavaDoc ctor)
82    {
83       this.ctor = ctor;
84       this.ctorParamTypes = ctor.getParameterTypes();
85    }
86
87    public Constructor JavaDoc getConstructor()
88    {
89       return ctor;
90    }
91
92    public Object JavaDoc newBeanInstance(Object JavaDoc ctorArg)
93    {
94       try
95       {
96          log.debug("Add constructor argument: " + ctorArg);
97          
98          int index = ctorParams.size();
99          Class JavaDoc paramType = ctorParamTypes[index];
100          if (JavaUtils.isConvertable(ctorArg, paramType) == false)
101          {
102             log.debug("Ignoring parameter [" + ctorArg + "], given value is not convertable to " + paramType.getName());
103             ctorArg = null;
104          }
105          else
106          {
107             ctorArg = JavaUtils.convert(ctorArg, paramType);
108          }
109
110          ctorParams.add(ctorArg);
111
112          if (ctorParamTypes.length == ctorParams.size())
113          {
114             log.debug("Attempt to make bean with: " + toString());
115             Object JavaDoc bean = ctor.newInstance(ctorParams.toArray());
116             return bean;
117          }
118          else
119          {
120             log.debug("Waiting for more constructor arguments");
121             return null;
122          }
123       }
124       catch (Exception JavaDoc e)
125       {
126          throw new IllegalStateException JavaDoc("Cannot construct target object with: " + ctorParams);
127       }
128    }
129
130    public String JavaDoc toString()
131    {
132       return "[ctor=" + ctor + ",args=" + ctorParams + "]";
133    }
134 }
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