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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.Array;
import java.util.Map;
/**
* Implementation of PropertyAccessor that uses numbers and dynamic subscripts as properties to
* index into Java arrays.
*
* @author Luke Blanshard ([email protected])
* @author Drew Davidson ([email protected])
*/
public class ArrayPropertyAccessor extends ObjectPropertyAccessor implements PropertyAccessor{
@Override
public Object getProperty(Map context,Object target,Object name) throws OgnlException{
Object result = null;
if (name instanceof String){
if (name.equals("length")){
result = new Integer(Array.getLength(target));
}else{
result = super.getProperty(context, target, name);
}
}else{
Object index = name;
if (index instanceof DynamicSubscript){
int len = Array.getLength(target);
switch (((DynamicSubscript) index).getFlag()) {
case DynamicSubscript.ALL:
result = Array.newInstance(target.getClass().getComponentType(), len);
System.arraycopy(target, 0, result, 0, len);
break;
case DynamicSubscript.FIRST:
index = new Integer((len > 0) ? 0 : -1);
break;
case DynamicSubscript.MID:
index = new Integer((len > 0) ? (len / 2) : -1);
break;
case DynamicSubscript.LAST:
index = new Integer((len > 0) ? (len - 1) : -1);
break;
}
}
if (result == null){
if (index instanceof Number){
int i = ((Number) index).intValue();
result = (i >= 0) ? Array.get(target, i) : null;
}else{
throw new NoSuchPropertyException(target, index);
}
}
}
return result;
}
@Override
public void setProperty(Map context,Object target,Object name,Object value) throws OgnlException{
Object index = name;
boolean isNumber = (index instanceof Number);
if (isNumber || (index instanceof DynamicSubscript)){
TypeConverter converter = ((OgnlContext) context).getTypeConverter();
Object convertedValue;
convertedValue = converter.convertValue(context, target, null, name.toString(), value, target.getClass().getComponentType());
if (isNumber){
int i = ((Number) index).intValue();
if (i >= 0){
Array.set(target, i, convertedValue);
}
}else{
int len = Array.getLength(target);
switch (((DynamicSubscript) index).getFlag()) {
case DynamicSubscript.ALL:
System.arraycopy(target, 0, convertedValue, 0, len);
return;
case DynamicSubscript.FIRST:
index = new Integer((len > 0) ? 0 : -1);
break;
case DynamicSubscript.MID:
index = new Integer((len > 0) ? (len / 2) : -1);
break;
case DynamicSubscript.LAST:
index = new Integer((len > 0) ? (len - 1) : -1);
break;
}
}
}else{
if (name instanceof String){
super.setProperty(context, target, name, value);
}else{
throw new NoSuchPropertyException(target, index);
}
}
}
@Override
public String getSourceAccessor(OgnlContext context,Object target,Object index){
String indexStr = index.toString();
// need to convert to primitive for list index access
// System.out.println("index class " + index.getClass() + " current type " + context.getCurrentType() + " current object class " + context.getCurrentObject().getClass());
if (context.getCurrentType() != null && !context.getCurrentType().isPrimitive()
&& Number.class.isAssignableFrom(context.getCurrentType())){
indexStr += "." + OgnlRuntime.getNumericValueGetter(context.getCurrentType());
}else if (context.getCurrentObject() != null && Number.class.isAssignableFrom(context.getCurrentObject().getClass())
&& !context.getCurrentType().isPrimitive()){
// means it needs to be cast first as well
String toString = String.class.isInstance(index) && context.getCurrentType() != Object.class ? "" : ".toString()";
indexStr = "ognl.OgnlOps#getIntValue(" + indexStr + toString + ")";
}
context.setCurrentAccessor(target.getClass());
context.setCurrentType(target.getClass().getComponentType());
return "[" + indexStr + "]";
}
@Override
public String getSourceSetter(OgnlContext context,Object target,Object index){
String indexStr = index.toString();
// need to convert to primitive for list index access
if (context.getCurrentType() != null && !context.getCurrentType().isPrimitive()
&& Number.class.isAssignableFrom(context.getCurrentType())){
indexStr += "." + OgnlRuntime.getNumericValueGetter(context.getCurrentType());
}else if (context.getCurrentObject() != null && Number.class.isAssignableFrom(context.getCurrentObject().getClass())
&& !context.getCurrentType().isPrimitive()){
// means it needs to be cast first as well
String toString = String.class.isInstance(index) && context.getCurrentType() != Object.class ? "" : ".toString()";
indexStr = "ognl.OgnlOps#getIntValue(" + indexStr + toString + ")";
}
Class type = target.getClass().isArray() ? target.getClass().getComponentType() : target.getClass();
context.setCurrentAccessor(target.getClass());
context.setCurrentType(target.getClass().getComponentType());
if (type.isPrimitive()){
Class wrapClass = OgnlRuntime.getPrimitiveWrapperClass(type);
return "[" + indexStr + "]=((" + wrapClass.getName() + ")ognl.OgnlOps.convertValue($3," + wrapClass.getName()
+ ".class, true))." + OgnlRuntime.getNumericValueGetter(wrapClass);
}else{
return "[" + indexStr + "]=ognl.OgnlOps.convertValue($3," + type.getName() + ".class)";
}
}
}