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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
// --------------------------------------------------------------------------
// Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// Neither the name of the Drew Davidson nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.
// --------------------------------------------------------------------------
package com.feilong.lib.ognl;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
/**
* @author Luke Blanshard ([email protected])
* @author Drew Davidson ([email protected])
*/
public class ASTStaticField extends SimpleNode implements NodeType{
/**
*
*/
private static final long serialVersionUID = 5628236838853970756L;
private String className;
private String fieldName;
private Class _getterClass;
public ASTStaticField(int id){
super(id);
}
public ASTStaticField(OgnlParser p, int id){
super(p, id);
}
/** Called from parser action. */
void init(String className,String fieldName){
this.className = className;
this.fieldName = fieldName;
}
@Override
protected Object getValueBody(OgnlContext context,Object source) throws OgnlException{
return OgnlRuntime.getStaticField(context, className, fieldName);
}
@Override
public boolean isNodeConstant(OgnlContext context) throws OgnlException{
boolean result = false;
Exception reason = null;
try{
Class c = OgnlRuntime.classForName(context, className);
/*
* Check for virtual static field "class"; this cannot interfere with normal static
* fields because it is a reserved word. It is considered constant.
*/
if (fieldName.equals("class")){
result = true;
}else if (c.isEnum()){
result = true;
}else{
Field f = OgnlRuntime.getField(c, fieldName);
if (f == null){
throw new NoSuchFieldException(fieldName);
}
if (!Modifier.isStatic(f.getModifiers())){
throw new OgnlException("Field " + fieldName + " of class " + className + " is not static");
}
result = Modifier.isFinal(f.getModifiers());
}
}catch (ClassNotFoundException e){
reason = e;
}catch (NoSuchFieldException e){
reason = e;
}catch (SecurityException e){
reason = e;
}
if (reason != null){
throw new OgnlException("Could not get static field " + fieldName + " from class " + className, reason);
}
return result;
}
Class getFieldClass(OgnlContext context) throws OgnlException{
Exception reason = null;
try{
Class c = OgnlRuntime.classForName(context, className);
/*
* Check for virtual static field "class"; this cannot interfere with normal static
* fields because it is a reserved word. It is considered constant.
*/
if (fieldName.equals("class")){
return c;
}else if (c.isEnum()){
return c;
}else{
Field f = c.getField(fieldName);
return f.getType();
}
}catch (ClassNotFoundException e){
reason = e;
}catch (NoSuchFieldException e){
reason = e;
}catch (SecurityException e){
reason = e;
}
if (reason != null){
throw new OgnlException("Could not get static field " + fieldName + " from class " + className, reason);
}
return null;
}
@Override
public Class getGetterClass(){
return _getterClass;
}
@Override
public Class getSetterClass(){
return _getterClass;
}
@Override
public String toString(){
return "@" + className + "@" + fieldName;
}
@Override
public String toGetSourceString(OgnlContext context,Object target){
try{
Object obj = OgnlRuntime.getStaticField(context, className, fieldName);
context.setCurrentObject(obj);
_getterClass = getFieldClass(context);
context.setCurrentType(_getterClass);
}catch (Throwable t){
throw OgnlOps.castToRuntime(t);
}
return className + "." + fieldName;
}
@Override
public String toSetSourceString(OgnlContext context,Object target){
try{
Object obj = OgnlRuntime.getStaticField(context, className, fieldName);
context.setCurrentObject(obj);
_getterClass = getFieldClass(context);
context.setCurrentType(_getterClass);
}catch (Throwable t){
throw OgnlOps.castToRuntime(t);
}
return className + "." + fieldName;
}
}