com.sun.syndication.feed.impl.ToStringBean Maven / Gradle / Ivy
/*
* Copyright 2004 Sun Microsystems, Inc.
*
* Licensed 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 com.sun.syndication.feed.impl;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Array;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.Stack;
import java.io.Serializable;
/**
* Provides deep Bean toString support.
*
* It works on all read/write properties, recursively. It support all primitive types, Strings, Collections,
* ToString objects and multi-dimensional arrays of any of them.
*
* @author Alejandro Abdelnur
*
*/
public class ToStringBean implements Serializable {
private static final ThreadLocal PREFIX_TL = new ThreadLocal() {
public Object get() {
Object o = super.get();
if (o==null) {
o = new Stack();
set(o);
}
return o;
}
};
private static final Object[] NO_PARAMS = new Object[0];
private Class _beanClass;
private Object _obj;
/**
* Default constructor.
*
* To be used by classes extending ToStringBean only.
*
* @param beanClass indicates the class to scan for properties, normally an interface class.
*
*/
protected ToStringBean(Class beanClass) {
_beanClass = beanClass;
_obj = this;
}
/**
* Creates a ToStringBean to be used in a delegation pattern.
*
* For example:
*
*
* public class Foo implements ToString {
*
* public String toString(String prefix) {
* ToStringBean tsb = new ToStringBean(this);
* return tsb.toString(prefix);
* }
*
* public String toString() {
* return toString("Foo");
* }
*
* }
*
*
* @param beanClass indicates the class to scan for properties, normally an interface class.
* @param obj object bean to create String representation.
*
*/
public ToStringBean(Class beanClass,Object obj) {
_beanClass = beanClass;
_obj = obj;
}
/**
* Returns the String representation of the bean given in the constructor.
*
* It uses the Class name as the prefix.
*
* @return bean object String representation.
*
*/
public String toString() {
Stack stack = (Stack) PREFIX_TL.get();
String[] tsInfo = (String[]) ((stack.isEmpty()) ? null : stack.peek());
String prefix;
if (tsInfo==null) {
String className = _obj.getClass().getName();
prefix = className.substring(className.lastIndexOf(".")+1);
}
else {
prefix = tsInfo[0];
tsInfo[1] = prefix;
}
return toString(prefix);
}
/**
* Returns the String representation of the bean given in the constructor.
*
* @param prefix to use for bean properties.
* @return bean object String representation.
*
*/
private String toString(String prefix) {
StringBuffer sb = new StringBuffer(128);
try {
PropertyDescriptor[] pds = BeanIntrospector.getPropertyDescriptors(_beanClass);
if (pds!=null) {
for (int i=0;i