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ReflectionUtils (Bean Scripting Framework API)
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org.apache.bsf.util</FONT>
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Class ReflectionUtils</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>org.apache.bsf.util.ReflectionUtils</B>
</PRE>
<HR>
<DL>
<DT>public class <B>ReflectionUtils</B><DT>extends java.lang.Object</DL>
<P>
This file is a collection of reflection utilities. There are utilities
for creating beans, getting bean infos, setting/getting properties,
and binding events.
<P>
<P>
<DL>
<DT><B>Author:</B></DT>
<DD>Sanjiva Weerawarana, Joseph Kesselman</DD>
</DL>
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<P>
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<TD><CODE><B><A HREF="../../../../org/apache/bsf/util/ReflectionUtils.html#ReflectionUtils()">ReflectionUtils</A></B>()</CODE>
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<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/bsf/util/ReflectionUtils.html#addEventListener(java.lang.Object, java.lang.String, org.apache.bsf.util.event.EventProcessor)">addEventListener</A></B>(java.lang.Object source,
java.lang.String eventSetName,
<A HREF="../../../../org/apache/bsf/util/event/EventProcessor.html" title="interface in org.apache.bsf.util.event">EventProcessor</A> processor)</CODE>
<BR>
Add an event processor as a listener to some event coming out of an
object.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/bsf/util/ReflectionUtils.html#createBean(java.lang.ClassLoader, java.lang.String, java.lang.Class[], java.lang.Object[])">createBean</A></B>(java.lang.ClassLoader cld,
java.lang.String className,
java.lang.Class[] argTypes,
java.lang.Object[] args)</CODE>
<BR>
Create a bean using given class loader and using the appropriate
constructor for the given args of the given arg types.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/bsf/util/ReflectionUtils.html#createBean(java.lang.ClassLoader, java.lang.String, java.lang.Object[])">createBean</A></B>(java.lang.ClassLoader cld,
java.lang.String className,
java.lang.Object[] args)</CODE>
<BR>
Create a bean using given class loader and using the appropriate
constructor for the given args.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/bsf/util/ReflectionUtils.html#getField(java.lang.Object, java.lang.String)">getField</A></B>(java.lang.Object target,
java.lang.String fieldName)</CODE>
<BR>
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<CODE>static <A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/bsf/util/ReflectionUtils.html#getProperty(java.lang.Object, java.lang.String, java.lang.Integer)">getProperty</A></B>(java.lang.Object target,
java.lang.String propName,
java.lang.Integer index)</CODE>
<BR>
Get a property of a bean.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/bsf/util/ReflectionUtils.html#setField(java.lang.Object, java.lang.String, org.apache.bsf.util.Bean, org.apache.bsf.util.type.TypeConvertorRegistry)">setField</A></B>(java.lang.Object target,
java.lang.String fieldName,
<A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A> value,
<A HREF="../../../../org/apache/bsf/util/type/TypeConvertorRegistry.html" title="class in org.apache.bsf.util.type">TypeConvertorRegistry</A> tcr)</CODE>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/bsf/util/ReflectionUtils.html#setProperty(java.lang.Object, java.lang.String, java.lang.Integer, java.lang.Object, java.lang.Class, org.apache.bsf.util.type.TypeConvertorRegistry)">setProperty</A></B>(java.lang.Object target,
java.lang.String propName,
java.lang.Integer index,
java.lang.Object value,
java.lang.Class valueType,
<A HREF="../../../../org/apache/bsf/util/type/TypeConvertorRegistry.html" title="class in org.apache.bsf.util.type">TypeConvertorRegistry</A> tcr)</CODE>
<BR>
Set a property of a bean to a given value.</TD>
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<TD><B>Methods inherited from class java.lang.Object</B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
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<P>
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<A NAME="ReflectionUtils()"><!-- --></A><H3>
ReflectionUtils</H3>
<PRE>
public <B>ReflectionUtils</B>()</PRE>
<DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
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<A NAME="addEventListener(java.lang.Object, java.lang.String, org.apache.bsf.util.event.EventProcessor)"><!-- --></A><H3>
addEventListener</H3>
<PRE>
public static void <B>addEventListener</B>(java.lang.Object source,
java.lang.String eventSetName,
<A HREF="../../../../org/apache/bsf/util/event/EventProcessor.html" title="interface in org.apache.bsf.util.event">EventProcessor</A> processor)
throws java.beans.IntrospectionException,
java.lang.IllegalArgumentException,
java.lang.IllegalAccessException,
java.lang.InstantiationException,
java.lang.reflect.InvocationTargetException</PRE>
<DL>
<DD>Add an event processor as a listener to some event coming out of an
object.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - event source<DD><CODE>eventSetName</CODE> - name of event set from event src to bind to<DD><CODE>processor</CODE> - event processor the event should be delegated to
when it occurs; either via processEvent or
processExceptionableEvent.
<DT><B>Throws:</B>
<DD><CODE>java.beans.IntrospectionException</CODE> - if unable to introspect
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if event set is unknown
<DD><CODE>java.lang.IllegalAccessException</CODE> - if the event adapter class or
initializer is not accessible.
<DD><CODE>java.lang.InstantiationException</CODE> - if event adapter instantiation fails
<DD><CODE>java.lang.reflect.InvocationTargetException</CODE> - if something goes wrong while
running add event listener method</DL>
</DD>
</DL>
<HR>
<A NAME="createBean(java.lang.ClassLoader, java.lang.String, java.lang.Class[], java.lang.Object[])"><!-- --></A><H3>
createBean</H3>
<PRE>
public static <A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A> <B>createBean</B>(java.lang.ClassLoader cld,
java.lang.String className,
java.lang.Class[] argTypes,
java.lang.Object[] args)
throws java.lang.ClassNotFoundException,
java.lang.NoSuchMethodException,
java.lang.InstantiationException,
java.lang.IllegalAccessException,
java.lang.IllegalArgumentException,
java.lang.reflect.InvocationTargetException,
java.io.IOException</PRE>
<DL>
<DD>Create a bean using given class loader and using the appropriate
constructor for the given args of the given arg types.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>cld</CODE> - the class loader to use. If null, Class.forName is used.<DD><CODE>className</CODE> - name of class to instantiate<DD><CODE>argTypes</CODE> - array of argument types<DD><CODE>args</CODE> - array of arguments
<DT><B>Returns:</B><DD>the newly created bean
<DT><B>Throws:</B>
<DD><CODE>java.lang.ClassNotFoundException</CODE> - if class is not loaded
<DD><CODE>java.lang.NoSuchMethodException</CODE> - if constructor can't be found
<DD><CODE>java.lang.InstantiationException</CODE> - if class can't be instantiated
<DD><CODE>java.lang.IllegalAccessException</CODE> - if class is not accessible
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if argument problem
<DD><CODE>java.lang.reflect.InvocationTargetException</CODE> - if constructor excepted
<DD><CODE>java.io.IOException</CODE> - if I/O error in beans.instantiate</DL>
</DD>
</DL>
<HR>
<A NAME="createBean(java.lang.ClassLoader, java.lang.String, java.lang.Object[])"><!-- --></A><H3>
createBean</H3>
<PRE>
public static <A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A> <B>createBean</B>(java.lang.ClassLoader cld,
java.lang.String className,
java.lang.Object[] args)
throws java.lang.ClassNotFoundException,
java.lang.NoSuchMethodException,
java.lang.InstantiationException,
java.lang.IllegalAccessException,
java.lang.IllegalArgumentException,
java.lang.reflect.InvocationTargetException,
java.io.IOException</PRE>
<DL>
<DD>Create a bean using given class loader and using the appropriate
constructor for the given args. Figures out the arg types and
calls above.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>cld</CODE> - the class loader to use. If null, Class.forName is used.<DD><CODE>className</CODE> - name of class to instantiate<DD><CODE>args</CODE> - array of arguments
<DT><B>Returns:</B><DD>the newly created bean
<DT><B>Throws:</B>
<DD><CODE>java.lang.ClassNotFoundException</CODE> - if class is not loaded
<DD><CODE>java.lang.NoSuchMethodException</CODE> - if constructor can't be found
<DD><CODE>java.lang.InstantiationException</CODE> - if class can't be instantiated
<DD><CODE>java.lang.IllegalAccessException</CODE> - if class is not accessible
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if argument problem
<DD><CODE>java.lang.reflect.InvocationTargetException</CODE> - if constructor excepted
<DD><CODE>java.io.IOException</CODE> - if I/O error in beans.instantiate</DL>
</DD>
</DL>
<HR>
<A NAME="getField(java.lang.Object, java.lang.String)"><!-- --></A><H3>
getField</H3>
<PRE>
public static <A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A> <B>getField</B>(java.lang.Object target,
java.lang.String fieldName)
throws java.lang.IllegalArgumentException,
java.lang.IllegalAccessException</PRE>
<DL>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE>
<DD><CODE>java.lang.IllegalAccessException</CODE></DL>
</DD>
</DL>
<HR>
<A NAME="getProperty(java.lang.Object, java.lang.String, java.lang.Integer)"><!-- --></A><H3>
getProperty</H3>
<PRE>
public static <A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A> <B>getProperty</B>(java.lang.Object target,
java.lang.String propName,
java.lang.Integer index)
throws java.beans.IntrospectionException,
java.lang.IllegalArgumentException,
java.lang.IllegalAccessException,
java.lang.reflect.InvocationTargetException</PRE>
<DL>
<DD>Get a property of a bean.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>target</CODE> - the object whose prop is to be gotten<DD><CODE>propName</CODE> - name of the property to set<DD><CODE>index</CODE> - index to get (if property is indexed)
<DT><B>Throws:</B>
<DD><CODE>java.beans.IntrospectionException</CODE> - if unable to introspect
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if problems with args: if the
property is unknown, or if the property is given an index
when its not, or if the property is not writeable, or if
the given value cannot be assigned to the it (type mismatch).
<DD><CODE>java.lang.IllegalAccessException</CODE> - if read method is not accessible
<DD><CODE>java.lang.reflect.InvocationTargetException</CODE> - if read method excepts</DL>
</DD>
</DL>
<HR>
<A NAME="setField(java.lang.Object, java.lang.String, org.apache.bsf.util.Bean, org.apache.bsf.util.type.TypeConvertorRegistry)"><!-- --></A><H3>
setField</H3>
<PRE>
public static void <B>setField</B>(java.lang.Object target,
java.lang.String fieldName,
<A HREF="../../../../org/apache/bsf/util/Bean.html" title="class in org.apache.bsf.util">Bean</A> value,
<A HREF="../../../../org/apache/bsf/util/type/TypeConvertorRegistry.html" title="class in org.apache.bsf.util.type">TypeConvertorRegistry</A> tcr)
throws java.lang.IllegalArgumentException,
java.lang.IllegalAccessException</PRE>
<DL>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE>
<DD><CODE>java.lang.IllegalAccessException</CODE></DL>
</DD>
</DL>
<HR>
<A NAME="setProperty(java.lang.Object, java.lang.String, java.lang.Integer, java.lang.Object, java.lang.Class, org.apache.bsf.util.type.TypeConvertorRegistry)"><!-- --></A><H3>
setProperty</H3>
<PRE>
public static void <B>setProperty</B>(java.lang.Object target,
java.lang.String propName,
java.lang.Integer index,
java.lang.Object value,
java.lang.Class valueType,
<A HREF="../../../../org/apache/bsf/util/type/TypeConvertorRegistry.html" title="class in org.apache.bsf.util.type">TypeConvertorRegistry</A> tcr)
throws java.beans.IntrospectionException,
java.lang.IllegalArgumentException,
java.lang.IllegalAccessException,
java.lang.reflect.InvocationTargetException</PRE>
<DL>
<DD>Set a property of a bean to a given value.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>target</CODE> - the object whose prop is to be set<DD><CODE>propName</CODE> - name of the property to set<DD><CODE>index</CODE> - index to set (if property is indexed)<DD><CODE>value</CODE> - the property value<DD><CODE>valueType</CODE> - the type of the above (needed when its null)<DD><CODE>tcr</CODE> - type convertor registry to use to convert value type to
property type if necessary
<DT><B>Throws:</B>
<DD><CODE>java.beans.IntrospectionException</CODE> - if unable to introspect
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if problems with args: if the
property is unknown, or if the property is given an index
when its not, or if the property is not writeable, or if
the given value cannot be assigned to the it (type mismatch).
<DD><CODE>java.lang.IllegalAccessException</CODE> - if write method is not accessible
<DD><CODE>java.lang.reflect.InvocationTargetException</CODE> - if write method excepts</DL>
</DD>
</DL>
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