| /* |
| * Copyright 2010 Google Inc. |
| * |
| * 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.google.gwt.validation.rebind; |
| |
| import com.google.gwt.core.ext.Generator; |
| import com.google.gwt.core.ext.GeneratorContext; |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.core.ext.typeinfo.JClassType; |
| import com.google.gwt.core.ext.typeinfo.JParameterizedType; |
| import com.google.gwt.core.ext.typeinfo.TypeOracle; |
| import com.google.gwt.validation.client.GwtValidation; |
| import com.google.gwt.validation.client.impl.GwtSpecificValidator; |
| |
| import javax.validation.Validator; |
| |
| /** |
| * Generates subclasses of {@link Validator} and {@link GwtSpecificValidator}. The generic |
| * validator only handles the classes listed in the |
| * {@link com.google.gwt.validation.client.GwtValidation} annotation. See |
| * {@link com.google.gwt.validation.client.GwtValidation} for usage. |
| */ |
| public final class ValidatorGenerator extends Generator { |
| |
| private final BeanHelperCache cache; |
| private Class<?>[] validGroups; |
| |
| // called by the compiler via reflection |
| public ValidatorGenerator() { |
| this.cache = new BeanHelperCache(); |
| this.validGroups = new Class<?>[]{ }; |
| } |
| |
| // called from tests |
| public ValidatorGenerator(BeanHelperCache cache, Class<?>[] validGroups) { |
| this.cache = cache; |
| this.validGroups = validGroups; |
| } |
| |
| @Override |
| public String generate(TreeLogger logger, GeneratorContext context, |
| String typeName) throws UnableToCompleteException { |
| TypeOracle typeOracle = context.getTypeOracle(); |
| assert (typeOracle != null); |
| |
| JClassType validatorType = findType(logger, typeOracle, typeName); |
| JClassType genericType = findType(logger, typeOracle, Validator.class.getName()); |
| JClassType gwtSpecificType = |
| findType(logger, typeOracle, GwtSpecificValidator.class.getName()); |
| |
| if (validatorType.isAssignableTo(genericType)) { |
| return generateGenericValidator(logger, context, validatorType); |
| } else if (validatorType.isAssignableTo(gwtSpecificType)) { |
| return generateGwtSpecificValidator(logger, context, validatorType); |
| } else { |
| logger.log(TreeLogger.ERROR, |
| "type is not a ValidatorGenerator or GwtSpecificValidatorGenerator: '" + typeName + "'", |
| null); |
| throw new UnableToCompleteException(); |
| } |
| } |
| |
| private JClassType findType(TreeLogger logger, TypeOracle typeOracle, String typeName) |
| throws UnableToCompleteException { |
| JClassType result = typeOracle.findType(typeName); |
| if (result == null) { |
| logger.log(TreeLogger.ERROR, "Unable to find metadata for type '" |
| + typeName + "'", null); |
| throw new UnableToCompleteException(); |
| } |
| return result; |
| } |
| |
| private String generateGenericValidator(TreeLogger logger, GeneratorContext context, |
| JClassType validatorType) throws UnableToCompleteException { |
| String typeName = validatorType.getName(); |
| |
| GwtValidation gwtValidation = validatorType.findAnnotationInTypeHierarchy(GwtValidation.class); |
| |
| if (gwtValidation == null) { |
| logger.log(TreeLogger.ERROR, typeName + " must be anntotated with " |
| + GwtValidation.class.getCanonicalName(), null); |
| throw new UnableToCompleteException(); |
| } |
| |
| if (gwtValidation.value().length == 0) { |
| logger.log(TreeLogger.ERROR, |
| "The @" + GwtValidation.class.getSimpleName() + " of " + typeName |
| + "must specify at least one bean type to validate.", null); |
| throw new UnableToCompleteException(); |
| } |
| |
| if (gwtValidation.groups().length == 0) { |
| logger.log(TreeLogger.ERROR, |
| "The @" + GwtValidation.class.getSimpleName() + " of " + typeName |
| + "must specify at least one validation group.", null); |
| throw new UnableToCompleteException(); |
| } |
| |
| this.validGroups = gwtValidation.groups(); |
| |
| TreeLogger validatorLogger = logger.branch(TreeLogger.DEBUG, |
| "Generating Validator for '" + validatorType.getQualifiedSourceName() |
| + "'", null); |
| AbstractCreator creator = new ValidatorCreator(validatorType, |
| gwtValidation, |
| validatorLogger, |
| context, cache); |
| return creator.create(); |
| } |
| |
| private String generateGwtSpecificValidator(TreeLogger logger, GeneratorContext context, |
| JClassType validatorType) throws UnableToCompleteException { |
| |
| JClassType gwtSpecificInterface = getGwtSpecificValidator(logger, validatorType); |
| JClassType beanType = getBeanType(logger, validatorType, gwtSpecificInterface); |
| |
| BeanHelper beanHelper = cache.createHelper(beanType, logger, context); |
| |
| if (beanHelper == null) { |
| logger.log(TreeLogger.ERROR, "Unable to create BeanHelper for " + beanType |
| + " " + GwtSpecificValidator.class.getSimpleName() |
| + ".", null); |
| throw new UnableToCompleteException(); |
| } |
| |
| AbstractCreator creator = new GwtSpecificValidatorCreator(validatorType, |
| beanType, beanHelper, logger, context, cache, validGroups); |
| return creator.create(); |
| } |
| |
| private JClassType getBeanType(TreeLogger logger, JClassType validator, |
| JClassType gwtSpecificInterface) throws UnableToCompleteException { |
| if (gwtSpecificInterface instanceof JParameterizedType) { |
| JParameterizedType paramType = (JParameterizedType) gwtSpecificInterface; |
| return paramType.getTypeArgs()[0]; |
| } |
| logger.log(TreeLogger.ERROR, validator.getQualifiedSourceName() |
| + " must implement " + GwtSpecificValidator.class.getCanonicalName() |
| + " with a one generic parameter.", null); |
| throw new UnableToCompleteException(); |
| } |
| |
| private JClassType getGwtSpecificValidator(TreeLogger logger, |
| JClassType validator) throws UnableToCompleteException { |
| for (JClassType interfaceType : validator.getImplementedInterfaces()) { |
| if (interfaceType.getQualifiedSourceName().endsWith( |
| GwtSpecificValidator.class.getCanonicalName())) { |
| return interfaceType; |
| } |
| } |
| logger.log(TreeLogger.ERROR, validator.getQualifiedSourceName() |
| + " must implement " + GwtSpecificValidator.class.getCanonicalName(), |
| null); |
| throw new UnableToCompleteException(); |
| } |
| } |