| /* |
| * Copyright (c) 2003-2007 The Visigoth Software Society. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. 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. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowledgement: |
| * "This product includes software developed by the |
| * Visigoth Software Society (http://www.visigoths.org/)." |
| * Alternately, this acknowledgement may appear in the software itself, |
| * if and wherever such third-party acknowledgements normally appear. |
| * |
| * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the |
| * project contributors may be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact visigoths@visigoths.org. |
| * |
| * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth" |
| * nor may "FreeMarker" or "Visigoth" appear in their names |
| * without prior written permission of the Visigoth Software Society. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 VISIGOTH SOFTWARE SOCIETY OR |
| * ITS 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Visigoth Software Society. For more |
| * information on the Visigoth Software Society, please see |
| * http://www.visigoths.org/ |
| */ |
| package freemarker.ext.beans; |
| |
| import java.lang.reflect.Array; |
| import java.lang.reflect.Member; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import freemarker.core._DelayedFTLTypeDescription; |
| import freemarker.core._TemplateModelException; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateModelException; |
| import freemarker.template.utility.ClassUtil; |
| |
| /** |
| * This class is used for constructors and as a base for non-overloaded methods |
| * @author Attila Szegedi |
| */ |
| class SimpleMemberModel |
| { |
| private final Member member; |
| private final Class[] argTypes; |
| |
| protected SimpleMemberModel(Member member, Class[] argTypes) |
| { |
| this.member = member; |
| this.argTypes = argTypes; |
| } |
| |
| Object[] unwrapArguments(List arguments, BeansWrapper wrapper) throws TemplateModelException |
| { |
| if(arguments == null) { |
| arguments = Collections.EMPTY_LIST; |
| } |
| boolean isVarArg = MethodUtilities.isVarArgs(member); |
| int typesLen = argTypes.length; |
| if(isVarArg) { |
| if(typesLen - 1 > arguments.size()) { |
| throw new TemplateModelException("Method " + member + |
| " takes at least " + (typesLen - 1) + |
| " arguments, " + arguments.size() + " was given."); |
| } |
| } |
| else if(typesLen != arguments.size()) { |
| throw new TemplateModelException("Method " + member + |
| " takes exactly " + typesLen + " arguments, " + |
| arguments.size() + " was given."); |
| } |
| |
| Object[] args = unwrapArguments(arguments, argTypes, isVarArg, wrapper); |
| return args; |
| } |
| |
| static Object[] unwrapArguments(List args, Class[] argTypes, boolean isVarargs, |
| BeansWrapper w) |
| throws TemplateModelException { |
| if(args == null) return null; |
| |
| int typesLen = argTypes.length; |
| int argsLen = args.size(); |
| |
| Object[] unwrappedArgs = new Object[typesLen]; |
| |
| // Unwrap arguments: |
| Iterator it = args.iterator(); |
| int normalArgCnt = isVarargs ? typesLen - 1 : typesLen; |
| int argIdx = 0; |
| while (argIdx < normalArgCnt) { |
| Class argType = argTypes[argIdx]; |
| TemplateModel argVal = (TemplateModel) it.next(); |
| Object unwrappedArgVal = w.tryUnwrap(argVal, argType); |
| if(unwrappedArgVal == BeansWrapper.CAN_NOT_UNWRAP) { |
| throw createArgumentTypeMismarchException(argIdx, argVal, argType); |
| } |
| if (unwrappedArgVal == null && argType.isPrimitive()) { |
| throw createNullToPrimitiveArgumentException(argIdx, argType); |
| } |
| |
| unwrappedArgs[argIdx++] = unwrappedArgVal; |
| } |
| if (isVarargs) { |
| // The last argType, which is the vararg type, wasn't processed yet. |
| |
| Class varargType = argTypes[typesLen - 1]; |
| Class varargItemType = varargType.getComponentType(); |
| if (!it.hasNext()) { |
| unwrappedArgs[argIdx++] = Array.newInstance(varargItemType, 0); |
| } else { |
| TemplateModel argVal = (TemplateModel) it.next(); |
| |
| Object unwrappedArgVal; |
| // We first try to treat the last argument as a vararg *array*. |
| // This is consistent to what OverloadedVarArgMethod does. |
| if (argsLen - argIdx == 1 |
| && (unwrappedArgVal = w.tryUnwrap(argVal, varargType)) |
| != BeansWrapper.CAN_NOT_UNWRAP) { |
| // It was a vararg array. |
| unwrappedArgs[argIdx++] = unwrappedArgVal; |
| } else { |
| // It wasn't a vararg array, so we assume it's a vararg |
| // array *item*, possibly followed by further ones. |
| int varargArrayLen = argsLen - argIdx; |
| Object varargArray = Array.newInstance(varargItemType, varargArrayLen); |
| for (int varargIdx = 0; varargIdx < varargArrayLen; varargIdx++) { |
| TemplateModel varargVal = (TemplateModel) (varargIdx == 0 ? argVal : it.next()); |
| Object unwrappedVarargVal = w.tryUnwrap(varargVal, varargItemType); |
| if(unwrappedVarargVal == BeansWrapper.CAN_NOT_UNWRAP) { |
| throw createArgumentTypeMismarchException( |
| argIdx + varargIdx, varargVal, varargItemType); |
| } |
| |
| if (unwrappedVarargVal == null && varargItemType.isPrimitive()) { |
| throw createNullToPrimitiveArgumentException(argIdx + varargIdx, varargItemType); |
| } |
| Array.set(varargArray, varargIdx, unwrappedVarargVal); |
| } |
| unwrappedArgs[argIdx++] = varargArray; |
| } |
| } |
| } |
| |
| return unwrappedArgs; |
| } |
| |
| private static TemplateModelException createArgumentTypeMismarchException( |
| int argIdx, TemplateModel argVal, Class targetType) { |
| return new _TemplateModelException(new Object[] { |
| "Argument type mismatch; can't convert (unwrap) argument #", new Integer(argIdx + 1), |
| " value of type ", new _DelayedFTLTypeDescription(argVal), |
| " to ", ClassUtil.getShortClassName(targetType), "." }); |
| } |
| |
| private static TemplateModelException createNullToPrimitiveArgumentException(int argIdx, Class targetType) { |
| return new _TemplateModelException(new Object[] { |
| "Argument type mismatch; argument #", new Integer(argIdx + 1), |
| " is null, which can't be converted to primitive type ", targetType.getName(), "." }); |
| } |
| |
| protected Member getMember() { |
| return member; |
| } |
| } |