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the jfinal enjoy plugin for normal java program to use sql management function.
/**
* Copyright (c) 2011-2017, James Zhan 詹波 ([email protected]).
*
* 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.jfinal.template.expr.ast;
import java.lang.reflect.InvocationTargetException;
import com.jfinal.template.TemplateException;
import com.jfinal.template.stat.Location;
import com.jfinal.template.stat.ParseException;
import com.jfinal.template.stat.Scope;
/**
* Method : expr '.' ID '(' exprList? ')'
*/
public class Method extends Expr {
private Expr expr;
private String methodName;
private ExprList exprList;
public Method(Expr expr, String methodName, ExprList exprList, Location location) {
if (exprList == null || exprList.length() == 0) {
throw new ParseException("The parameter of method can not be blank", location);
}
init(expr, methodName, exprList, location);
}
public Method(Expr expr, String methodName, Location location) {
init(expr, methodName, ExprList.NULL_EXPR_LIST, location);
}
private void init(Expr expr, String methodName, ExprList exprList, Location location) {
if (expr == null) {
throw new ParseException("The target for method invoking can not be blank", location);
}
if (MethodKit.isForbiddenMethod(methodName)) {
throw new ParseException("Forbidden method: " + methodName, location);
}
this.expr = expr;
this.methodName = methodName;
this.exprList = exprList;
this.location = location;
}
public Object eval(Scope scope) {
Object target = expr.eval(scope);
if (target == null) {
if (scope.getCtrl().isNullSafe()) {
return null;
}
throw new TemplateException("The target for method invoking can not be null, method name: " + methodName, location);
}
Object[] argValues = exprList.evalExprList(scope);
MethodInfo methodInfo;
try {
methodInfo = MethodKit.getMethod(target.getClass(), methodName, argValues);
} catch (Exception e) {
throw new TemplateException(e.getMessage(), location, e);
}
if (methodInfo == null) {
if (scope.getCtrl().isNullSafe()) {
return null;
}
throw new TemplateException(buildMethodNotFoundSignature("Method not found: " + target.getClass().getName() + ".", methodName, argValues), location);
}
try {
return methodInfo.invoke(target, argValues);
} catch (InvocationTargetException e) {
Throwable t = e.getTargetException();
if (t != null) {
throw new TemplateException(t.getMessage(), location, t);
} else {
throw new TemplateException(e.getMessage(), location, e);
}
} catch (Exception e) {
throw new TemplateException(e.getMessage(), location, e);
}
}
static String buildMethodNotFoundSignature(String preMsg, String methodName, Object[] argValues) {
StringBuilder ret = new StringBuilder().append(preMsg).append(methodName).append("(");
if (argValues != null) {
for (int i = 0; i < argValues.length; i++) {
if (i > 0) {
ret.append(", ");
}
ret.append(argValues[i] != null ? argValues[i].getClass().getName() : "null");
}
}
return ret.append(")").toString();
}
/*
public static Object invokeVarArgsMethod(java.lang.reflect.Method method, Object target, Object[] argValues) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {
Class[] paraTypes = method.getParameterTypes();
Object[] finalArgValues = new Object[paraTypes.length];
int fixedParaLength = paraTypes.length - 1;
System.arraycopy(argValues, 0, finalArgValues, 0, fixedParaLength);
Class varParaComponentType = paraTypes[paraTypes.length - 1].getComponentType();
Object varParaValues = Array.newInstance(varParaComponentType, argValues.length - fixedParaLength);
int p = 0;
for (int i=fixedParaLength; i