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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.math.BigDecimal;
import java.math.BigInteger;
import com.feilong.lib.ognl.enhance.ExpressionCompiler;
/**
* @author Luke Blanshard ([email protected])
* @author Drew Davidson ([email protected])
*/
class ASTAdd extends NumericExpression{
/**
*
*/
private static final long serialVersionUID = 7539710878696139202L;
public ASTAdd(int id){
super(id);
}
public ASTAdd(OgnlParser p, int id){
super(p, id);
}
@Override
public void jjtClose(){
flattenTree();
}
@Override
protected Object getValueBody(OgnlContext context,Object source) throws OgnlException{
Object result = _children[0].getValue(context, source);
for (int i = 1; i < _children.length; ++i){
result = OgnlOps.add(result, _children[i].getValue(context, source));
}
return result;
}
@Override
public String getExpressionOperator(int index){
return "+";
}
boolean isWider(NodeType type,NodeType lastType){
if (lastType == null){
return true;
}
//System.out.println("checking isWider(" + type.getGetterClass() + " , " + lastType.getGetterClass() + ")");
if (String.class.isAssignableFrom(lastType.getGetterClass())){
return false;
}
if (String.class.isAssignableFrom(type.getGetterClass())){
return true;
}
if (_parent != null && String.class.isAssignableFrom(type.getGetterClass())){
return true;
}
if (String.class.isAssignableFrom(lastType.getGetterClass()) && Object.class == type.getGetterClass()){
return false;
}
if (_parent != null && String.class.isAssignableFrom(lastType.getGetterClass())){
return false;
}else if (_parent == null && String.class.isAssignableFrom(lastType.getGetterClass())){
return true;
}else if (_parent == null && String.class.isAssignableFrom(type.getGetterClass())){
return false;
}
if (BigDecimal.class.isAssignableFrom(type.getGetterClass()) || BigInteger.class.isAssignableFrom(type.getGetterClass())){
return true;
}
if (BigDecimal.class.isAssignableFrom(lastType.getGetterClass()) || BigInteger.class.isAssignableFrom(lastType.getGetterClass())){
return false;
}
if (Double.class.isAssignableFrom(type.getGetterClass())){
return true;
}
if (Integer.class.isAssignableFrom(type.getGetterClass()) && Double.class.isAssignableFrom(lastType.getGetterClass())){
return false;
}
if (Float.class.isAssignableFrom(type.getGetterClass()) && Integer.class.isAssignableFrom(lastType.getGetterClass())){
return true;
}
return true;
}
@Override
public String toGetSourceString(OgnlContext context,Object target){
try{
String result = "";
NodeType lastType = null;
// go through once to determine the ultimate type
if ((_children != null) && (_children.length > 0)){
Class currType = context.getCurrentType();
Class currAccessor = context.getCurrentAccessor();
Object cast = context.get(ExpressionCompiler.PRE_CAST);
for (Node element : _children){
element.toGetSourceString(context, target);
if (NodeType.class.isInstance(element) && ((NodeType) element).getGetterClass() != null
&& isWider((NodeType) element, lastType)){
lastType = (NodeType) element;
}
}
context.put(ExpressionCompiler.PRE_CAST, cast);
context.setCurrentType(currType);
context.setCurrentAccessor(currAccessor);
}
// reset context since previous children loop would have changed it
context.setCurrentObject(target);
if ((_children != null) && (_children.length > 0)){
for (int i = 0; i < _children.length; ++i){
if (i > 0){
result += " " + getExpressionOperator(i) + " ";
}
String expr = _children[i].toGetSourceString(context, target);
if ((expr != null && "null".equals(expr))
|| (!ASTConst.class.isInstance(_children[i]) && (expr == null || expr.trim().length() <= 0))){
expr = "null";
}
//System.out.println("astadd child class: " + _children[i].getClass().getName() + " and return expr: " + expr);
if (ASTProperty.class.isInstance(_children[i])){
expr = ExpressionCompiler.getRootExpression(_children[i], context.getRoot(), context) + expr;
context.setCurrentAccessor(context.getRoot().getClass());
}else if (ASTMethod.class.isInstance(_children[i])){
String chain = (String) context.get("_currentChain");
String rootExpr = ExpressionCompiler.getRootExpression(_children[i], context.getRoot(), context);
//System.out.println("astadd chains is >>" + chain + "<< and rootExpr is >>" + rootExpr + "<<");
// dirty fix for overly aggressive casting dot operations
if (rootExpr.endsWith(".") && chain != null && chain.startsWith(").")){
chain = chain.substring(1, chain.length());
}
expr = rootExpr + (chain != null ? chain + "." : "") + expr;
context.setCurrentAccessor(context.getRoot().getClass());
}else if (ExpressionNode.class.isInstance(_children[i])){
expr = "(" + expr + ")";
}else if ((_parent == null || !ASTChain.class.isInstance(_parent)) && ASTChain.class.isInstance(_children[i])){
String rootExpr = ExpressionCompiler.getRootExpression(_children[i], context.getRoot(), context);
if (!ASTProperty.class.isInstance(_children[i].jjtGetChild(0)) && rootExpr.endsWith(")") && expr.startsWith(")")){
expr = expr.substring(1, expr.length());
}
expr = rootExpr + expr;
context.setCurrentAccessor(context.getRoot().getClass());
String cast = (String) context.remove(ExpressionCompiler.PRE_CAST);
if (cast == null){
cast = "";
}
expr = cast + expr;
}
// turn quoted characters into quoted strings
if (context.getCurrentType() != null && context.getCurrentType() == Character.class
&& ASTConst.class.isInstance(_children[i])){
if (expr.indexOf('\'') >= 0){
expr = expr.replaceAll("'", "\"");
}
context.setCurrentType(String.class);
}else{
if (!ASTVarRef.class.isAssignableFrom(_children[i].getClass()) && !ASTProperty.class.isInstance(_children[i])
&& !ASTMethod.class.isInstance(_children[i]) && !ASTSequence.class.isInstance(_children[i])
&& !ASTChain.class.isInstance(_children[i])
&& !NumericExpression.class.isAssignableFrom(_children[i].getClass())
&& !ASTStaticField.class.isInstance(_children[i]) && !ASTStaticMethod.class.isInstance(_children[i])
&& !ASTTest.class.isInstance(_children[i])){
if (lastType != null && String.class.isAssignableFrom(lastType.getGetterClass())){
//System.out.println("Input expr >>" + expr + "<<");
if (expr.indexOf(""") >= 0){
expr = expr.replaceAll(""", "\"");
}
if (expr.indexOf('"') >= 0){
expr = expr.replaceAll("\"", "'");
}
expr = "\"" + expr + "\"";
//System.out.println("Expr now >>" + expr + "<<");
}
}
}
result += expr;
// hanlde addition for numeric types when applicable or just string concatenation
if ((lastType == null || !String.class.isAssignableFrom(lastType.getGetterClass()))
&& !ASTConst.class.isAssignableFrom(_children[i].getClass())
&& !NumericExpression.class.isAssignableFrom(_children[i].getClass())){
if (context.getCurrentType() != null && Number.class.isAssignableFrom(context.getCurrentType())
&& !ASTMethod.class.isInstance(_children[i])){
if (ASTVarRef.class.isInstance(_children[i]) || ASTProperty.class.isInstance(_children[i])
|| ASTChain.class.isInstance(_children[i])){
result += ".";
}
result += OgnlRuntime.getNumericValueGetter(context.getCurrentType());
context.setCurrentType(OgnlRuntime.getPrimitiveWrapperClass(context.getCurrentType()));
}
}
if (lastType != null){
context.setCurrentAccessor(lastType.getGetterClass());
}
}
}
if (_parent == null || ASTSequence.class.isAssignableFrom(_parent.getClass())){
if (_getterClass != null && String.class.isAssignableFrom(_getterClass)){
_getterClass = Object.class;
}
}else{
context.setCurrentType(_getterClass);
}
try{
Object contextObj = getValueBody(context, target);
context.setCurrentObject(contextObj);
}catch (Throwable t){
throw OgnlOps.castToRuntime(t);
}
return result;
}catch (Throwable t){
throw OgnlOps.castToRuntime(t);
}
}
}