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JAVA-2109: Bootstrap entity annotations and processing
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49 changes: 49 additions & 0 deletions
49
...ava/com/datastax/oss/driver/internal/mapper/processor/entity/DefaultEntityDefinition.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| /* | ||
| * Copyright DataStax, 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.datastax.oss.driver.internal.mapper.processor.entity; | ||
|
|
||
| import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableList; | ||
| import com.squareup.javapoet.ClassName; | ||
| import java.util.List; | ||
|
|
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| public class DefaultEntityDefinition implements EntityDefinition { | ||
|
|
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| private final ClassName className; | ||
| private final String cqlName; | ||
| private final ImmutableList<PropertyDefinition> propertyDefinitions; | ||
|
|
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| public DefaultEntityDefinition( | ||
| ClassName className, String cqlName, List<PropertyDefinition> propertyDefinitions) { | ||
| this.className = className; | ||
| this.cqlName = cqlName; | ||
| this.propertyDefinitions = ImmutableList.copyOf(propertyDefinitions); | ||
| } | ||
|
|
||
| @Override | ||
| public ClassName getClassName() { | ||
| return className; | ||
| } | ||
|
|
||
| @Override | ||
| public String getCqlName() { | ||
| return cqlName; | ||
| } | ||
|
|
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| @Override | ||
| public Iterable<PropertyDefinition> getProperties() { | ||
| return propertyDefinitions; | ||
| } | ||
| } |
136 changes: 136 additions & 0 deletions
136
...n/java/com/datastax/oss/driver/internal/mapper/processor/entity/DefaultEntityFactory.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| /* | ||
| * Copyright DataStax, 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.datastax.oss.driver.internal.mapper.processor.entity; | ||
|
|
||
| import com.datastax.oss.driver.api.mapper.annotations.Entity; | ||
| import com.datastax.oss.driver.internal.mapper.processor.ProcessorContext; | ||
| import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableList; | ||
| import com.squareup.javapoet.ClassName; | ||
| import com.squareup.javapoet.TypeName; | ||
| import java.beans.Introspector; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import javax.lang.model.element.Element; | ||
| import javax.lang.model.element.ElementKind; | ||
| import javax.lang.model.element.ExecutableElement; | ||
| import javax.lang.model.element.TypeElement; | ||
| import javax.lang.model.element.VariableElement; | ||
| import javax.lang.model.type.DeclaredType; | ||
| import javax.lang.model.type.TypeKind; | ||
| import javax.lang.model.type.TypeMirror; | ||
|
|
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| public class DefaultEntityFactory implements EntityFactory { | ||
|
|
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| private final ProcessorContext context; | ||
|
|
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| public DefaultEntityFactory(ProcessorContext context) { | ||
| this.context = context; | ||
| } | ||
|
|
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| @Override | ||
| public EntityDefinition getDefinition(TypeElement classElement) { | ||
|
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| // Basic implementation to get things started: look for pairs of getter/setter methods that | ||
| // share the same name and operate on the same type. | ||
| // This will get revisited in future tickets: | ||
| // TODO support custom naming conventions | ||
| // TODO property annotations: PK, custom name, computed, ignored... | ||
| // TODO inherit annotations and properties from superclass / parent interface | ||
| // TODO handle annotations on fields... | ||
|
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| Map<String, DefaultPropertyDefinition.Builder> propertyBuilders = new HashMap<>(); | ||
| for (Element child : classElement.getEnclosedElements()) { | ||
| if (child.getKind() == ElementKind.METHOD) { | ||
| ExecutableElement method = (ExecutableElement) child; | ||
| String methodName = method.getSimpleName().toString(); | ||
| if (methodName.startsWith("get") && method.getParameters().isEmpty()) { | ||
| TypeMirror returnTypeMirror = method.getReturnType(); | ||
| TypeName propertyType = TypeName.get(returnTypeMirror); | ||
| if (TypeName.VOID.equals(propertyType)) { | ||
| continue; | ||
| } | ||
| String propertyName = Introspector.decapitalize(methodName.substring(3)); | ||
| DefaultPropertyDefinition.Builder builder = propertyBuilders.get(propertyName); | ||
| if (builder == null) { | ||
| builder = | ||
| new DefaultPropertyDefinition.Builder( | ||
| propertyName, propertyType, getEntityElement(returnTypeMirror)); | ||
| propertyBuilders.put(propertyName, builder); | ||
| } else if (!builder.getType().equals(propertyType)) { | ||
| context | ||
| .getMessager() | ||
| .warn( | ||
| method, | ||
| "Ignoring method %s %s() because there is a setter " | ||
| + "with the same name but a different type: %s(%s)", | ||
| propertyType, | ||
| methodName, | ||
| builder.getSetterName(), | ||
| builder.getType()); | ||
| continue; | ||
| } | ||
| builder.withGetterName(methodName); | ||
| } else if (methodName.startsWith("set") && method.getParameters().size() == 1) { | ||
| String propertyName = Introspector.decapitalize(methodName.substring(3)); | ||
| VariableElement parameter = method.getParameters().get(0); | ||
| TypeMirror typeMirror = parameter.asType(); | ||
| TypeName propertyType = TypeName.get(typeMirror); | ||
| DefaultPropertyDefinition.Builder builder = propertyBuilders.get(propertyName); | ||
| if (builder == null) { | ||
| builder = | ||
| new DefaultPropertyDefinition.Builder( | ||
| propertyName, propertyType, getEntityElement(typeMirror)); | ||
| propertyBuilders.put(propertyName, builder); | ||
| } else if (!builder.getType().equals(propertyType)) { | ||
| context | ||
| .getMessager() | ||
| .warn( | ||
| method, | ||
| "Ignoring method %s(%s) because there is a getter " | ||
| + "with the same name but a different type: %s %s()", | ||
| methodName, | ||
| propertyType, | ||
| builder.getType(), | ||
| builder.getGetterName()); | ||
| continue; | ||
| } | ||
| builder.withSetterName(methodName); | ||
| } | ||
| } | ||
| } | ||
|
|
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| ImmutableList.Builder<PropertyDefinition> definitions = ImmutableList.builder(); | ||
| for (DefaultPropertyDefinition.Builder builder : propertyBuilders.values()) { | ||
| if (builder.getGetterName() != null && builder.getSetterName() != null) { | ||
| definitions.add(builder.build()); | ||
| } | ||
| } | ||
|
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| String entityName = Introspector.decapitalize(classElement.getSimpleName().toString()); | ||
| return new DefaultEntityDefinition( | ||
| ClassName.get(classElement), entityName, definitions.build()); | ||
| } | ||
|
|
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| private TypeElement getEntityElement(TypeMirror typeMirror) { | ||
| if (typeMirror.getKind() == TypeKind.DECLARED) { | ||
| Element element = ((DeclaredType) typeMirror).asElement(); | ||
| if (element.getKind() == ElementKind.CLASS && element.getAnnotation(Entity.class) != null) { | ||
| return (TypeElement) element; | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
| } |
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