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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.tomcat.jdbc.naming;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Enumeration;
import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.Name;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;

import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.jdbc.pool.ClassLoaderUtil;

/**
 * Simple way of configuring generic resources by using reflection.
 * Example usage:
 * 

 * <Resource factory="org.apache.tomcat.jdbc.naming.GenericNamingResourcesFactory"
 *              name="jdbc/test"
 *              type="org.apache.derby.jdbc.ClientXADataSource"
 *              databaseName="sample"
 *              createDatabase="create"
 *              serverName="localhost"
 *              port="1527"/>
 * 
* */ public class GenericNamingResourcesFactory implements ObjectFactory { private static final Log log = LogFactory.getLog(GenericNamingResourcesFactory.class); @Override public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable environment) throws Exception { if ((obj == null) || !(obj instanceof Reference)) { return null; } Reference ref = (Reference) obj; Enumeration refs = ref.getAll(); String type = ref.getClassName(); Object o = ClassLoaderUtil.loadClass( type, GenericNamingResourcesFactory.class.getClassLoader(), Thread.currentThread().getContextClassLoader()).getConstructor().newInstance(); while (refs.hasMoreElements()) { RefAddr addr = refs.nextElement(); String param = addr.getType(); String value = null; if (addr.getContent()!=null) { value = addr.getContent().toString(); } if (setProperty(o, param, value)) { } else { log.debug("Property not configured["+param+"]. No setter found on["+o+"]."); } } return o; } @SuppressWarnings("null") // setPropertyMethodVoid can't be null when used private static boolean setProperty(Object o, String name, String value) { if (log.isDebugEnabled()) log.debug("IntrospectionUtils: setProperty(" + o.getClass() + " " + name + "=" + value + ")"); String setter = "set" + capitalize(name); try { Method methods[] = o.getClass().getMethods(); Method setPropertyMethodVoid = null; Method setPropertyMethodBool = null; // First, the ideal case - a setFoo( String ) method for (int i = 0; i < methods.length; i++) { Class paramT[] = methods[i].getParameterTypes(); if (setter.equals(methods[i].getName()) && paramT.length == 1 && "java.lang.String".equals(paramT[0].getName())) { methods[i].invoke(o, new Object[] { value }); return true; } } // Try a setFoo ( int ) or ( boolean ) for (int i = 0; i < methods.length; i++) { boolean ok = true; if (setter.equals(methods[i].getName()) && methods[i].getParameterTypes().length == 1) { // match - find the type and invoke it Class paramType = methods[i].getParameterTypes()[0]; Object params[] = new Object[1]; // Try a setFoo ( int ) if ("java.lang.Integer".equals(paramType.getName()) || "int".equals(paramType.getName())) { try { params[0] = Integer.valueOf(value); } catch (NumberFormatException ex) { ok = false; } // Try a setFoo ( long ) }else if ("java.lang.Long".equals(paramType.getName()) || "long".equals(paramType.getName())) { try { params[0] = Long.valueOf(value); } catch (NumberFormatException ex) { ok = false; } // Try a setFoo ( boolean ) } else if ("java.lang.Boolean".equals(paramType.getName()) || "boolean".equals(paramType.getName())) { params[0] = Boolean.valueOf(value); // Try a setFoo ( InetAddress ) } else if ("java.net.InetAddress".equals(paramType .getName())) { try { params[0] = InetAddress.getByName(value); } catch (UnknownHostException exc) { if (log.isDebugEnabled()) log.debug("IntrospectionUtils: Unable to resolve host name:" + value); ok = false; } // Unknown type } else { if (log.isDebugEnabled()) log.debug("IntrospectionUtils: Unknown type " + paramType.getName()); } if (ok) { methods[i].invoke(o, params); return true; } } // save "setProperty" for later if ("setProperty".equals(methods[i].getName())) { if (methods[i].getReturnType()==Boolean.TYPE){ setPropertyMethodBool = methods[i]; }else { setPropertyMethodVoid = methods[i]; } } } // Ok, no setXXX found, try a setProperty("name", "value") if (setPropertyMethodBool != null || setPropertyMethodVoid != null) { Object params[] = new Object[2]; params[0] = name; params[1] = value; if (setPropertyMethodBool != null) { try { return ((Boolean) setPropertyMethodBool.invoke(o, params)).booleanValue(); }catch (IllegalArgumentException biae) { //the boolean method had the wrong //parameter types. lets try the other if (setPropertyMethodVoid!=null) { setPropertyMethodVoid.invoke(o, params); return true; }else { throw biae; } } } else { setPropertyMethodVoid.invoke(o, params); return true; } } } catch (IllegalArgumentException ex2) { log.warn("IAE " + o + " " + name + " " + value, ex2); } catch (SecurityException ex1) { if (log.isDebugEnabled()) log.debug("IntrospectionUtils: SecurityException for " + o.getClass() + " " + name + "=" + value + ")", ex1); } catch (IllegalAccessException iae) { if (log.isDebugEnabled()) log.debug("IntrospectionUtils: IllegalAccessException for " + o.getClass() + " " + name + "=" + value + ")", iae); } catch (InvocationTargetException ie) { Throwable cause = ie.getCause(); if (cause instanceof ThreadDeath) { throw (ThreadDeath) cause; } if (cause instanceof VirtualMachineError) { throw (VirtualMachineError) cause; } if (log.isDebugEnabled()) log.debug("IntrospectionUtils: InvocationTargetException for " + o.getClass() + " " + name + "=" + value + ")", ie); } return false; } public static String capitalize(String name) { if (name == null || name.length() == 0) { return name; } char chars[] = name.toCharArray(); chars[0] = Character.toUpperCase(chars[0]); return new String(chars); } }




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