package com.sun.facelets.oracle.adf;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.StringTokenizer;
import com.sun.facelets.FaceletContext;
import com.sun.facelets.tag.Metadata;
import com.sun.facelets.tag.MetadataTarget;
import com.sun.facelets.tag.MetaRule;
import com.sun.facelets.tag.TagAttribute;
import com.sun.facelets.tag.TagAttributeException;
/**
*
* @author Adam Winer
* @version $Id: StringArrayPropertyTagRule.java,v 1.1 2005/08/23 05:54:54 adamwiner Exp $
*/
final class StringArrayPropertyTagRule extends MetaRule
{
public static final MetaRule Instance = new StringArrayPropertyTagRule();
private static class LiteralPropertyMetadata extends Metadata
{
public LiteralPropertyMetadata(Method method, TagAttribute attribute)
{
_method = method;
_attribute = attribute;
}
public void applyMetadata(FaceletContext ctx, Object instance)
{
if (_params == null)
{
String[] strArray = _coerceToStringArray(_attribute.getValue());
_params = new Object[]{strArray};
}
try
{
_method.invoke(instance, _params);
}
catch (InvocationTargetException e)
{
throw new TagAttributeException(_attribute, e.getCause());
}
catch (Exception e)
{
throw new TagAttributeException(_attribute, e);
}
}
private final Method _method;
private final TagAttribute _attribute;
private Object[] _params;
}
public Metadata applyRule(
String name,
TagAttribute attribute,
MetadataTarget meta)
{
// Leave expressions to the underlying code
if ((meta.getPropertyType(name) == _STRING_ARRAY_TYPE) &&
attribute.isLiteral())
{
Method m = meta.getWriteMethod(name);
// if the property is writable
if (m != null)
{
return new LiteralPropertyMetadata(m, attribute);
}
}
return null;
}
static private String[] _coerceToStringArray(String str)
{
if (str == null)
return null;
ArrayList list = new ArrayList();
StringTokenizer tokens = new StringTokenizer(str);
while (tokens.hasMoreTokens())
list.add(tokens.nextToken());
String[] strArray = new String[list.size()];
return (String[]) list.toArray(strArray);
}
static private final Class _STRING_ARRAY_TYPE = (new String[0]).getClass();
}