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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.lang.reflect.Constructor;
import java.util.List;
import com.feilong.lib.ognl.enhance.ExpressionCompiler;
/**
* @author Luke Blanshard ([email protected])
* @author Drew Davidson ([email protected])
*/
public class ASTCtor extends SimpleNode{
/**
*
*/
private static final long serialVersionUID = 4509147220372167063L;
private String className;
private boolean isArray;
public ASTCtor(int id){
super(id);
}
public ASTCtor(OgnlParser p, int id){
super(p, id);
}
/** Called from parser action. */
void setClassName(String className){
this.className = className;
}
Class getCreatedClass(OgnlContext context) throws ClassNotFoundException{
return OgnlRuntime.classForName(context, className);
}
void setArray(boolean value){
isArray = value;
}
public boolean isArray(){
return isArray;
}
@Override
protected Object getValueBody(OgnlContext context,Object source) throws OgnlException{
Object result, root = context.getRoot();
int count = jjtGetNumChildren();
Object[] args = OgnlRuntime.getObjectArrayPool().create(count);
try{
for (int i = 0; i < count; ++i){
args[i] = _children[i].getValue(context, root);
}
if (isArray){
if (args.length == 1){
try{
Class componentClass = OgnlRuntime.classForName(context, className);
List sourceList = null;
int size;
if (args[0] instanceof List){
sourceList = (List) args[0];
size = sourceList.size();
}else{
size = (int) OgnlOps.longValue(args[0]);
}
result = Array.newInstance(componentClass, size);
if (sourceList != null){
TypeConverter converter = context.getTypeConverter();
for (int i = 0, icount = sourceList.size(); i < icount; i++){
Object o = sourceList.get(i);
if ((o == null) || componentClass.isInstance(o)){
Array.set(result, i, o);
}else{
Array.set(result, i, converter.convertValue(context, null, null, null, o, componentClass));
}
}
}
}catch (ClassNotFoundException ex){
throw new OgnlException("array component class '" + className + "' not found", ex);
}
}else{
throw new OgnlException("only expect array size or fixed initializer list");
}
}else{
result = OgnlRuntime.callConstructor(context, className, args);
}
return result;
}finally{
OgnlRuntime.getObjectArrayPool().recycle(args);
}
}
@Override
public String toString(){
String result = "new " + className;
if (isArray){
if (_children[0] instanceof ASTConst){
result = result + "[" + _children[0] + "]";
}else{
result = result + "[] " + _children[0];
}
}else{
result = result + "(";
if ((_children != null) && (_children.length > 0)){
for (int i = 0; i < _children.length; i++){
if (i > 0){
result = result + ", ";
}
result = result + _children[i];
}
}
result = result + ")";
}
return result;
}
@Override
public String toGetSourceString(OgnlContext context,Object target){
String result = "new " + className;
Class clazz = null;
Object ctorValue = null;
try{
clazz = OgnlRuntime.classForName(context, className);
ctorValue = this.getValueBody(context, target);
context.setCurrentObject(ctorValue);
if (clazz != null && ctorValue != null){
context.setCurrentType(ctorValue.getClass());
context.setCurrentAccessor(ctorValue.getClass());
}
if (isArray){
context.put("_ctorClass", clazz);
}
}catch (Throwable t){
throw OgnlOps.castToRuntime(t);
}
try{
if (isArray){
if (_children[0] instanceof ASTConst){
result = result + "[" + _children[0].toGetSourceString(context, target) + "]";
}else if (ASTProperty.class.isInstance(_children[0])){
result = result + "[" + ExpressionCompiler.getRootExpression(_children[0], target, context)
+ _children[0].toGetSourceString(context, target) + "]";
}else if (ASTChain.class.isInstance(_children[0])){
result = result + "[" + _children[0].toGetSourceString(context, target) + "]";
}else{
result = result + "[] " + _children[0].toGetSourceString(context, target);
}
}else{
result = result + "(";
if ((_children != null) && (_children.length > 0)){
Object[] values = new Object[_children.length];
String[] expressions = new String[_children.length];
Class[] types = new Class[_children.length];
// first populate arrays with child values
for (int i = 0; i < _children.length; i++){
Object objValue = _children[i].getValue(context, context.getRoot());
String value = _children[i].toGetSourceString(context, target);
if (!ASTRootVarRef.class.isInstance(_children[i])){
value = ExpressionCompiler.getRootExpression(_children[i], target, context) + value;
}
String cast = "";
if (ExpressionCompiler.shouldCast(_children[i])){
cast = (String) context.remove(ExpressionCompiler.PRE_CAST);
}
if (cast == null){
cast = "";
}
if (!ASTConst.class.isInstance(_children[i])){
value = cast + value;
}
values[i] = objValue;
expressions[i] = value;
types[i] = context.getCurrentType();
}
// now try and find a matching constructor
Constructor[] cons = clazz.getConstructors();
Constructor ctor = null;
Class[] ctorParamTypes = null;
for (Constructor con : cons){
Class[] ctorTypes = con.getParameterTypes();
if (OgnlRuntime.areArgsCompatible(values, ctorTypes)
&& (ctor == null || OgnlRuntime.isMoreSpecific(ctorTypes, ctorParamTypes))){
ctor = con;
ctorParamTypes = ctorTypes;
}
}
if (ctor == null){
ctor = OgnlRuntime.getConvertedConstructorAndArgs(
context,
clazz,
OgnlRuntime.getConstructors(clazz),
values,
new Object[values.length]);
}
if (ctor == null){
throw new NoSuchMethodException("Unable to find constructor appropriate for arguments in class: " + clazz);
}
ctorParamTypes = ctor.getParameterTypes();
// now loop over child values again and build up the actual source string
for (int i = 0; i < _children.length; i++){
if (i > 0){
result = result + ", ";
}
String value = expressions[i];
if (types[i].isPrimitive()){
String literal = OgnlRuntime.getNumericLiteral(types[i]);
if (literal != null){
value += literal;
}
}
if (ctorParamTypes[i] != types[i]){
if (values[i] != null && !types[i].isPrimitive() && !values[i].getClass().isArray()
&& !ASTConst.class.isInstance(_children[i])){
value = "(" + OgnlRuntime.getCompiler().getInterfaceClass(values[i].getClass()).getName() + ")" + value;
}else if (!ASTConst.class.isInstance(_children[i])
|| (ASTConst.class.isInstance(_children[i]) && !types[i].isPrimitive())){
if (!types[i].isArray() && types[i].isPrimitive() && !ctorParamTypes[i].isPrimitive()){
value = "new " + ExpressionCompiler.getCastString(OgnlRuntime.getPrimitiveWrapperClass(types[i])) + "("
+ value + ")";
}else{
value = " ($w) " + value;
}
}
}
result += value;
}
}
result = result + ")";
}
context.setCurrentType(ctorValue != null ? ctorValue.getClass() : clazz);
context.setCurrentAccessor(clazz);
context.setCurrentObject(ctorValue);
}catch (Throwable t){
throw OgnlOps.castToRuntime(t);
}
context.remove("_ctorClass");
return result;
}
@Override
public String toSetSourceString(OgnlContext context,Object target){
return "";
}
}