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Posted to dev@commons.apache.org by ge...@apache.org on 2002/08/05 07:06:21 UTC
cvs commit: jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util AbstractExecutor.java ArrayIterator.java BooleanPropertyExecutor.java EnumerationIterator.java GetExecutor.java PropertyExecutor.java Introspector.java LogAdapter.java
geirm 2002/08/04 22:06:21
Modified: jexl/src/java/org/apache/commons/jexl/util Introspector.java
LogAdapter.java
Added: jexl/src/java/org/apache/commons/jexl/util
AbstractExecutor.java ArrayIterator.java
BooleanPropertyExecutor.java
EnumerationIterator.java GetExecutor.java
PropertyExecutor.java
Log:
more porting of velocity's core introspection stuff so Jexl is free to
do what it needs and removes dependency on velocity for functionality
Revision Changes Path
1.3 +5 -15 jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/Introspector.java
Index: Introspector.java
===================================================================
RCS file: /home/cvs/jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/Introspector.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- Introspector.java 20 May 2002 12:07:59 -0000 1.2
+++ Introspector.java 5 Aug 2002 05:06:21 -0000 1.3
@@ -53,14 +53,11 @@
*/
package org.apache.commons.jexl.util;
-import org.apache.velocity.util.introspection.Uberspect;
-import org.apache.velocity.util.introspection.UberspectImpl;
-import org.apache.velocity.util.introspection.UberspectLoggable;
-import org.apache.velocity.util.introspection.Info;
-import org.apache.velocity.util.introspection.VelMethod;
-import org.apache.velocity.runtime.RuntimeLogger;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.Log;
+import org.apache.commons.jexl.util.introspection.Uberspect;
+import org.apache.commons.jexl.util.introspection.UberspectImpl;
+import org.apache.commons.jexl.util.introspection.UberspectLoggable;
import java.lang.reflect.Method;
@@ -78,19 +75,12 @@
*/
private static Uberspect uberSpect;
- /**
- * so we can convert between commons and Velocity logging
- */
- private static LogAdapter logAdapter;
-
static {
Log logger = LogFactory.getLog(Introspector.class);
uberSpect = new UberspectImpl();
- logAdapter = new LogAdapter(logger);
-
- ((UberspectLoggable) uberSpect).setRuntimeLogger(logAdapter);
+ ((UberspectLoggable) uberSpect).setRuntimeLogger(logger);
}
/**
1.2 +1 -2 jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/LogAdapter.java
Index: LogAdapter.java
===================================================================
RCS file: /home/cvs/jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/LogAdapter.java,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- LogAdapter.java 26 Apr 2002 04:23:17 -0000 1.1
+++ LogAdapter.java 5 Aug 2002 05:06:21 -0000 1.2
@@ -1,13 +1,12 @@
package org.apache.commons.jexl.util;
import org.apache.commons.logging.Log;
-import org.apache.velocity.runtime.RuntimeLogger;
/**
*
* @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
*/
-public class LogAdapter implements RuntimeLogger
+public class LogAdapter
{
Log logger;
1.1 jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/AbstractExecutor.java
Index: AbstractExecutor.java
===================================================================
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.commons.jexl.util;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.commons.logging.Log;
/**
* Abstract class that is used to execute an arbitrary
* method that is in introspected. This is the superclass
* for the GetExecutor and PropertyExecutor.
*
* @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
* @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
* @version $Id: AbstractExecutor.java,v 1.1 2002/08/05 05:06:21 geirm Exp $
*/
public abstract class AbstractExecutor
{
protected Log rlog = null;
/**
* Method to be executed.
*/
protected Method method = null;
/**
* Execute method against context.
*/
public abstract Object execute(Object o)
throws IllegalAccessException, InvocationTargetException;
/**
* Tell whether the executor is alive by looking
* at the value of the method.
*/
public boolean isAlive()
{
return (method != null);
}
public Method getMethod()
{
return method;
}
}
1.1 jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/ArrayIterator.java
Index: ArrayIterator.java
===================================================================
/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.commons.jexl.util;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.lang.reflect.Array;
/**
* <p>
* An Iterator wrapper for an Object[]. This will
* allow us to deal with all array like structures
* in a consistent manner.
* </p>
* <p>
* WARNING : this class's operations are NOT synchronized.
* It is meant to be used in a single thread, newly created
* for each use in the #foreach() directive.
* If this is used or shared, synchronize in the
* next() method.
* </p>
*
* @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
* @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
* @version $Id: ArrayIterator.java,v 1.1 2002/08/05 05:06:21 geirm Exp $
*/
public class ArrayIterator implements Iterator
{
/**
* The objects to iterate.
*/
private Object array;
/**
* The current position and size in the array.
*/
private int pos;
private int size;
/**
* Creates a new iterator instance for the specified array.
*
* @param array The array for which an iterator is desired.
*/
public ArrayIterator(Object array)
{
/*
* if this isn't an array, then throw. Note that this is
* for internal use - so this should never happen - if it does
* we screwed up.
*/
if ( !array.getClass().isArray() )
{
throw new IllegalArgumentException(
"Programmer error : internal ArrayIterator invoked w/o array");
}
this.array = array;
pos = 0;
size = Array.getLength( this.array );
}
/**
* Move to next element in the array.
*
* @return The next object in the array.
*/
public Object next()
{
if (pos < size )
return Array.get( array, pos++);
/*
* we screwed up...
*/
throw new NoSuchElementException("No more elements: " + pos +
" / " + size);
}
/**
* Check to see if there is another element in the array.
*
* @return Whether there is another element.
*/
public boolean hasNext()
{
return (pos < size );
}
/**
* No op--merely added to satify the <code>Iterator</code> interface.
*/
public void remove()
{
throw new UnsupportedOperationException();
}
}
1.1 jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/BooleanPropertyExecutor.java
Index: BooleanPropertyExecutor.java
===================================================================
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.commons.jexl.util;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import org.apache.commons.logging.Log;
/**
* Handles discovery and valuation of a
* boolean object property, of the
* form public boolean is<property> when executed.
*
* We do this separately as to preserve the current
* quasi-broken semantics of get<as is property>
* get< flip 1st char> get("property") and now followed
* by is<Property>
*
* @author <a href="geirm@apache.org">Geir Magnusson Jr.</a>
* @version $Id: BooleanPropertyExecutor.java,v 1.1 2002/08/05 05:06:21 geirm Exp $
*/
public class BooleanPropertyExecutor extends PropertyExecutor
{
public BooleanPropertyExecutor(Log rlog, org.apache.commons.jexl.util.introspection.Introspector is, Class clazz, String property)
{
super(rlog, is, clazz, property);
}
protected void discover(Class clazz, String property)
{
try
{
char c;
StringBuffer sb;
Object[] params = { };
/*
* now look for a boolean isFoo
*/
sb = new StringBuffer("is");
sb.append(property);
c = sb.charAt(2);
if (Character.isLowerCase(c))
{
sb.setCharAt(2, Character.toUpperCase(c));
}
methodUsed = sb.toString();
method = introspector.getMethod(clazz, methodUsed, params);
if (method != null)
{
/*
* now, this has to return a boolean
*/
if (method.getReturnType() == Boolean.TYPE)
return;
method = null;
}
}
catch(Exception e)
{
rlog.error("PROGRAMMER ERROR : BooleanPropertyExector() : " + e);
}
}
}
1.1 jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/EnumerationIterator.java
Index: EnumerationIterator.java
===================================================================
/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.commons.jexl.util;
import java.util.Iterator;
import java.util.Enumeration;
/**
* An Iterator wrapper for an Enumeration.
*
* @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
* @version $Id: EnumerationIterator.java,v 1.1 2002/08/05 05:06:21 geirm Exp $
*/
public class EnumerationIterator implements Iterator
{
/**
* The enumeration to iterate.
*/
private Enumeration enum = null;
/**
* Creates a new iteratorwrapper instance for the specified
* Enumeration.
*
* @param enum The Enumeration to wrap.
*/
public EnumerationIterator( Enumeration enum)
{
this.enum = enum;
}
/**
* Move to next element in the array.
*
* @return The next object in the array.
*/
public Object next()
{
return enum.nextElement();
}
/**
* Check to see if there is another element in the array.
*
* @return Whether there is another element.
*/
public boolean hasNext()
{
return enum.hasMoreElements();
}
/**
* Unimplemented. No analogy in Enumeration
*/
public void remove()
{
// not implemented
}
}
1.1 jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/GetExecutor.java
Index: GetExecutor.java
===================================================================
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.commons.jexl.util;
import org.apache.commons.logging.Log;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
/**
* Executor that simply tries to execute a get(key)
* operation. This will try to find a get(key) method
* for any type of object, not just objects that
* implement the Map interface as was previously
* the case.
*
* @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
* @version $Id: GetExecutor.java,v 1.1 2002/08/05 05:06:21 geirm Exp $
*/
public class GetExecutor extends AbstractExecutor
{
/**
* Container to hold the 'key' part of
* get(key).
*/
private Object[] args = new Object[1];
/**
* Default constructor.
*/
public GetExecutor(Log r, org.apache.commons.jexl.util.introspection.Introspector ispect, Class c, String key)
throws Exception
{
rlog = r;
args[0] = key;
method = ispect.getMethod(c, "get", args);
}
/**
* Execute method against context.
*/
public Object execute(Object o)
throws IllegalAccessException, InvocationTargetException
{
if (method == null)
return null;
return method.invoke(o, args);
}
}
1.1 jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/util/PropertyExecutor.java
Index: PropertyExecutor.java
===================================================================
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.commons.jexl.util;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import org.apache.commons.jexl.util.introspection.Introspector;
import org.apache.commons.logging.Log;
/**
* Returned the value of object property when executed.
*/
public class PropertyExecutor extends AbstractExecutor
{
protected Introspector introspector = null;
protected String methodUsed = null;
public PropertyExecutor(Log r, Introspector ispctr,
Class clazz, String property)
{
rlog = r;
introspector = ispctr;
discover(clazz, property);
}
protected void discover(Class clazz, String property)
{
/*
* this is gross and linear, but it keeps it straightforward.
*/
try
{
char c;
StringBuffer sb;
Object[] params = { };
/*
* start with get<property>
* this leaves the property name
* as is...
*/
sb = new StringBuffer("get");
sb.append(property);
methodUsed = sb.toString();
method = introspector.getMethod(clazz, methodUsed, params);
if (method != null)
return;
/*
* now the convenience, flip the 1st character
*/
sb = new StringBuffer("get");
sb.append(property);
c = sb.charAt(3);
if (Character.isLowerCase(c))
{
sb.setCharAt(3, Character.toUpperCase(c));
}
else
{
sb.setCharAt(3, Character.toLowerCase(c));
}
methodUsed = sb.toString();
method = introspector.getMethod(clazz, methodUsed, params);
if (method != null)
return;
}
catch(Exception e)
{
rlog.error("PROGRAMMER ERROR : PropertyExector() : " + e );
}
}
/**
* Execute method against context.
*/
public Object execute(Object o)
throws IllegalAccessException, InvocationTargetException
{
if (method == null)
return null;
return method.invoke(o, null);
}
}
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