/* * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package com.sun.beans.finder;import java.beans.BeanDescriptor;import java.beans.BeanInfo;import java.beans.MethodDescriptor;import java.beans.PropertyDescriptor;import java.lang.reflect.Method;/** * This is utility class that provides functionality * to find a {@link BeanInfo} for a JavaBean specified by its type. * * @since 1.7 * * @author Sergey A. Malenkov */public final class BeanInfoFinder extends InstanceFinder<BeanInfo> { private static final String DEFAULT = "sun.beans.infos"; public BeanInfoFinder() { super(BeanInfo.class, true, "BeanInfo", DEFAULT); } private static boolean isValid(Class<?> type, Method method) { return (method != null) && method.getDeclaringClass().isAssignableFrom(type); } @Override protected BeanInfo instantiate(Class<?> type, String prefix, String name) { // this optimization will only use the BeanInfo search path // if is has changed from the original // or trying to get the ComponentBeanInfo BeanInfo info = !DEFAULT.equals(prefix) || "ComponentBeanInfo".equals(name) ? super.instantiate(type, prefix, name) : null; if (info != null) { // make sure that the returned BeanInfo matches the class BeanDescriptor bd = info.getBeanDescriptor(); if (bd != null) { if (type.equals(bd.getBeanClass())) { return info; } } else { PropertyDescriptor[] pds = info.getPropertyDescriptors(); if (pds != null) { for (PropertyDescriptor pd : pds) { Method method = pd.getReadMethod(); if (method == null) { method = pd.getWriteMethod(); } if (isValid(type, method)) { return info; } } } else { MethodDescriptor[] mds = info.getMethodDescriptors(); if (mds != null) { for (MethodDescriptor md : mds) { if (isValid(type, md.getMethod())) { return info; } } } } } } return null; }}
/*
* Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.beans.finder;
import java.beans.BeanDescriptor;
import java.beans.BeanInfo;
import java.beans.MethodDescriptor;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
/**
* This is utility class that provides functionality
* to find a {@link BeanInfo} for a JavaBean specified by its type.
*
* @since 1.7
*
* @author Sergey A. Malenkov
*/
public final class BeanInfoFinder
extends InstanceFinder<BeanInfo> {
private static final String DEFAULT = "sun.beans.infos";
public BeanInfoFinder() {
super(BeanInfo.class, true, "BeanInfo", DEFAULT);
}
private static boolean isValid(Class<?> type, Method method) {
return (method != null) && method.getDeclaringClass().isAssignableFrom(type);
}
@Override
protected BeanInfo instantiate(Class<?> type, String prefix, String name) {
// this optimization will only use the BeanInfo search path
// if is has changed from the original
// or trying to get the ComponentBeanInfo
BeanInfo info = !DEFAULT.equals(prefix) || "ComponentBeanInfo".equals(name)
? super.instantiate(type, prefix, name)
: null;
if (info != null) {
// make sure that the returned BeanInfo matches the class
BeanDescriptor bd = info.getBeanDescriptor();
if (bd != null) {
if (type.equals(bd.getBeanClass())) {
return info;
}
}
else {
PropertyDescriptor[] pds = info.getPropertyDescriptors();
if (pds != null) {
for (PropertyDescriptor pd : pds) {
Method method = pd.getReadMethod();
if (method == null) {
method = pd.getWriteMethod();
}
if (isValid(type, method)) {
return info;
}
}
}
else {
MethodDescriptor[] mds = info.getMethodDescriptors();
if (mds != null) {
for (MethodDescriptor md : mds) {
if (isValid(type, md.getMethod())) {
return info;
}
}
}
}
}
}
return null;
}
}