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ServiceMetadataProviderGenerator.java
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ServiceMetadataProviderGenerator.java
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/*
* Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 software.amazon.awssdk.codegen.lite.regions;
import static javax.lang.model.element.Modifier.FINAL;
import static javax.lang.model.element.Modifier.PRIVATE;
import static javax.lang.model.element.Modifier.PUBLIC;
import static javax.lang.model.element.Modifier.STATIC;
import com.squareup.javapoet.AnnotationSpec;
import com.squareup.javapoet.ClassName;
import com.squareup.javapoet.CodeBlock;
import com.squareup.javapoet.FieldSpec;
import com.squareup.javapoet.MethodSpec;
import com.squareup.javapoet.ParameterizedTypeName;
import com.squareup.javapoet.TypeName;
import com.squareup.javapoet.TypeSpec;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import software.amazon.awssdk.annotations.Generated;
import software.amazon.awssdk.annotations.SdkPublicApi;
import software.amazon.awssdk.codegen.lite.PoetClass;
import software.amazon.awssdk.codegen.lite.Utils;
import software.amazon.awssdk.codegen.lite.regions.model.Partitions;
import software.amazon.awssdk.utils.ImmutableMap;
public class ServiceMetadataProviderGenerator implements PoetClass {
private final Partitions partitions;
private final String basePackage;
private final String regionBasePackage;
public ServiceMetadataProviderGenerator(Partitions partitions,
String basePackage,
String regionBasePackage) {
this.partitions = partitions;
this.basePackage = basePackage;
this.regionBasePackage = regionBasePackage;
}
@Override
public TypeSpec poetClass() {
TypeName mapOfServiceMetadata = ParameterizedTypeName.get(ClassName.get(Map.class),
ClassName.get(String.class),
ClassName.get(regionBasePackage, "ServiceMetadata"));
return TypeSpec.classBuilder(className())
.addModifiers(PUBLIC)
.addSuperinterface(ClassName.get(regionBasePackage, "ServiceMetadataProvider"))
.addAnnotation(AnnotationSpec.builder(Generated.class)
.addMember("value", "$S", "software.amazon.awssdk:codegen")
.build())
.addAnnotation(SdkPublicApi.class)
.addModifiers(FINAL)
.addField(FieldSpec.builder(mapOfServiceMetadata, "SERVICE_METADATA")
.addModifiers(PRIVATE, FINAL, STATIC)
.initializer(regions(partitions))
.build())
.addMethod(getter())
.build();
}
@Override
public ClassName className() {
return ClassName.get(regionBasePackage, "GeneratedServiceMetadataProvider");
}
private CodeBlock regions(Partitions partitions) {
CodeBlock.Builder builder = CodeBlock.builder().add("$T.<String, ServiceMetadata>builder()", ImmutableMap.class);
Set<String> seenServices = new HashSet<>();
partitions.getPartitions()
.stream()
.forEach(p -> p.getServices()
.keySet()
.stream()
.forEach(s -> {
if (!seenServices.contains(s)) {
builder.add(".put($S, new $T())", s, serviceMetadataClass(s));
seenServices.add(s);
}
}));
return builder.add(".build()").build();
}
private ClassName serviceMetadataClass(String service) {
String sanitizedServiceName = service.replace(".", "-");
return ClassName.get(basePackage, Stream.of(sanitizedServiceName.split("-"))
.map(Utils::capitalize)
.collect(Collectors.joining()) + "ServiceMetadata");
}
private MethodSpec getter() {
return MethodSpec.methodBuilder("serviceMetadata")
.addModifiers(PUBLIC)
.addParameter(String.class, "endpointPrefix")
.returns(ClassName.get(regionBasePackage, "ServiceMetadata"))
.addStatement("return $L.get($L)", "SERVICE_METADATA", "endpointPrefix")
.build();
}
}