/* * Copyright (c) 2009, 2010, 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;/** * This is utility class that provides basic functionality * to find an auxiliary class for a JavaBean specified by its type. * * @since 1.7 * * @author Sergey A. Malenkov */class InstanceFinder<T> { private static final String[] EMPTY = { }; private final Class<? extends T> type; private final boolean allow; private final String suffix; private volatile String[] packages; InstanceFinder(Class<? extends T> type, boolean allow, String suffix, String... packages) { this.type = type; this.allow = allow; this.suffix = suffix; this.packages = packages.clone(); } public String[] getPackages() { return this.packages.clone(); } public void setPackages(String... packages) { this.packages = (packages != null) && (packages.length > 0) ? packages.clone() : EMPTY; } public T find(Class<?> type) { if (type == null) { return null; } String name = type.getName() + this.suffix; T object = instantiate(type, name); if (object != null) { return object; } if (this.allow) { object = instantiate(type, null); if (object != null) { return object; } } int index = name.lastIndexOf('.') + 1; if (index > 0) { name = name.substring(index); } for (String prefix : this.packages) { object = instantiate(type, prefix, name); if (object != null) { return object; } } return null; } protected T instantiate(Class<?> type, String name) { if (type != null) { try { if (name != null) { type = ClassFinder.findClass(name, type.getClassLoader()); } if (this.type.isAssignableFrom(type)) { return (T) type.newInstance(); } } catch (Exception exception) { // ignore any exceptions } } return null; } protected T instantiate(Class<?> type, String prefix, String name) { return instantiate(type, prefix + '.' + name); }}
/*
* Copyright (c) 2009, 2010, 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;
/**
* This is utility class that provides basic functionality
* to find an auxiliary class for a JavaBean specified by its type.
*
* @since 1.7
*
* @author Sergey A. Malenkov
*/
class InstanceFinder<T> {
private static final String[] EMPTY = { };
private final Class<? extends T> type;
private final boolean allow;
private final String suffix;
private volatile String[] packages;
InstanceFinder(Class<? extends T> type, boolean allow, String suffix, String... packages) {
this.type = type;
this.allow = allow;
this.suffix = suffix;
this.packages = packages.clone();
}
public String[] getPackages() {
return this.packages.clone();
}
public void setPackages(String... packages) {
this.packages = (packages != null) && (packages.length > 0)
? packages.clone()
: EMPTY;
}
public T find(Class<?> type) {
if (type == null) {
return null;
}
String name = type.getName() + this.suffix;
T object = instantiate(type, name);
if (object != null) {
return object;
}
if (this.allow) {
object = instantiate(type, null);
if (object != null) {
return object;
}
}
int index = name.lastIndexOf('.') + 1;
if (index > 0) {
name = name.substring(index);
}
for (String prefix : this.packages) {
object = instantiate(type, prefix, name);
if (object != null) {
return object;
}
}
return null;
}
protected T instantiate(Class<?> type, String name) {
if (type != null) {
try {
if (name != null) {
type = ClassFinder.findClass(name, type.getClassLoader());
}
if (this.type.isAssignableFrom(type)) {
return (T) type.newInstance();
}
}
catch (Exception exception) {
// ignore any exceptions
}
}
return null;
}
protected T instantiate(Class<?> type, String prefix, String name) {
return instantiate(type, prefix + '.' + name);
}
}