| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.plus.annotation; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Member; |
| import java.lang.reflect.Method; |
| import java.util.Locale; |
| |
| import javax.naming.InitialContext; |
| import javax.naming.NamingException; |
| |
| import org.eclipse.jetty.util.IntrospectionUtil; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| |
| /** |
| * Injection |
| * <p> |
| * Represents the injection of a resource into a target (method or field). |
| * The injection is performed by doing an ENC lookup using the jndi |
| * name provided, and setting the object obtained on the target. |
| */ |
| public class Injection |
| { |
| private static final Logger LOG = Log.getLogger(Injection.class); |
| |
| private Class<?> _targetClass; |
| private String _jndiName; |
| private String _mappingName; |
| private Member _target; |
| private Class<?> _paramClass; |
| private Class<?> _resourceClass; |
| |
| |
| public Injection () |
| { |
| } |
| |
| |
| /** |
| * @return the _className |
| */ |
| public Class<?> getTargetClass() |
| { |
| return _targetClass; |
| } |
| |
| public Class<?> getParamClass () |
| { |
| return _paramClass; |
| } |
| |
| public Class<?> getResourceClass () |
| { |
| return _resourceClass; |
| } |
| |
| public boolean isField () |
| { |
| return (_target != null && _target instanceof Field); |
| } |
| |
| public boolean isMethod () |
| { |
| return (_target != null && _target instanceof Method); |
| } |
| |
| /** |
| * @return the jndiName |
| */ |
| public String getJndiName() |
| { |
| return _jndiName; |
| } |
| /** |
| * @param jndiName the jndiName to set |
| */ |
| public void setJndiName(String jndiName) |
| { |
| this._jndiName = jndiName; |
| } |
| /** |
| * @return the mappingName |
| */ |
| public String getMappingName() |
| { |
| return _mappingName; |
| } |
| /** |
| * @param mappingName the mappingName to set |
| */ |
| public void setMappingName(String mappingName) |
| { |
| this._mappingName = mappingName; |
| } |
| |
| /** |
| * @return the target |
| */ |
| public Member getTarget() |
| { |
| return _target; |
| } |
| |
| |
| public void setTarget(Class<?> clazz, Field field, Class<?> resourceType) |
| { |
| _targetClass = clazz; |
| _target = field; |
| _resourceClass = resourceType; |
| } |
| |
| public void setTarget(Class<?> clazz, Method method, Class<?> arg, Class<?> resourceType) |
| { |
| _targetClass = clazz; |
| _target = method; |
| _resourceClass = resourceType; |
| _paramClass = arg; |
| } |
| |
| public void setTarget (Class<?> clazz, String target, Class<?> resourceType) |
| { |
| _targetClass = clazz; |
| _resourceClass = resourceType; |
| |
| //first look for a javabeans style setter matching the targetName |
| String setter = "set"+target.substring(0,1).toUpperCase(Locale.ENGLISH)+target.substring(1); |
| try |
| { |
| LOG.debug("Looking for method for setter: "+setter+" with arg "+_resourceClass); |
| _target = IntrospectionUtil.findMethod(clazz, setter, new Class[] {_resourceClass}, true, false); |
| _targetClass = clazz; |
| _paramClass = _resourceClass; |
| } |
| catch (NoSuchMethodException me) |
| { |
| //try as a field |
| try |
| { |
| _target = IntrospectionUtil.findField(clazz, target, resourceType, true, false); |
| _targetClass = clazz; |
| } |
| catch (NoSuchFieldException fe) |
| { |
| throw new IllegalArgumentException("No such field or method "+target+" on class "+_targetClass); |
| } |
| } |
| |
| } |
| |
| /** |
| * Inject a value for a Resource from JNDI into an object |
| * @param injectable the object to inject |
| */ |
| public void inject (Object injectable) |
| { |
| if (_target != null) |
| { |
| if (_target instanceof Field) |
| injectField((Field)_target, injectable); |
| else |
| injectMethod((Method)_target, injectable); |
| } |
| else |
| throw new IllegalStateException ("No method or field to inject with "+getJndiName()); |
| } |
| |
| |
| /** |
| * The Resource must already exist in the ENC of this webapp. |
| * @return the injected valud |
| * @throws NamingException if unable to lookup value |
| */ |
| public Object lookupInjectedValue () |
| throws NamingException |
| { |
| InitialContext context = new InitialContext(); |
| return context.lookup("java:comp/env/"+getJndiName()); |
| } |
| |
| |
| |
| /** |
| * Inject value from jndi into a field of an instance |
| * @param field the field to inject into |
| * @param injectable the value to inject |
| */ |
| protected void injectField (Field field, Object injectable) |
| { |
| try |
| { |
| boolean accessibility = field.isAccessible(); |
| field.setAccessible(true); |
| field.set(injectable, lookupInjectedValue()); |
| field.setAccessible(accessibility); |
| } |
| catch (Exception e) |
| { |
| LOG.warn(e); |
| throw new IllegalStateException("Inject failed for field "+field.getName()); |
| } |
| } |
| |
| /** |
| * Inject value from jndi into a setter method of an instance |
| * @param method the method to inject into |
| * @param injectable the value to inject |
| */ |
| protected void injectMethod (Method method, Object injectable) |
| { |
| try |
| { |
| boolean accessibility = method.isAccessible(); |
| method.setAccessible(true); |
| method.invoke(injectable, new Object[] {lookupInjectedValue()}); |
| method.setAccessible(accessibility); |
| } |
| catch (Exception e) |
| { |
| LOG.warn(e); |
| throw new IllegalStateException("Inject failed for method "+method.getName()); |
| } |
| } |
| |
| } |