content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.beam.sdk.schemas;
  
  import static org.apache.beam.sdk.schemas.annotations.DefaultSchema.DefaultSchemaProvider;
  import static org.apache.beam.sdk.schemas.utils.TestJavaBeans.SIMPLE_BEAN_SCHEMA;
  import static org.apache.beam.sdk.schemas.utils.TestPOJOs.SIMPLE_POJO_SCHEMA;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import com.google.auto.service.AutoService;
  import com.google.auto.value.AutoValue;
  import java.util.List;
  import org.apache.beam.sdk.schemas.annotations.DefaultSchema;
  import org.apache.beam.sdk.schemas.utils.TestJavaBeans.SimpleBean;
  import org.apache.beam.sdk.schemas.utils.TestPOJOs.SimplePOJO;
  import org.apache.beam.sdk.transforms.SerializableFunction;
  import org.apache.beam.sdk.values.Row;
  import org.apache.beam.sdk.values.TypeDescriptor;
  import org.apache.beam.sdk.values.TypeDescriptors;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  
  /** Unit tests for {@link SchemaRegistry}. */
  @SuppressWarnings({
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
  })
  public class SchemaRegistryTest {
    static final Schema EMPTY_SCHEMA = Schema.builder().build();
    static final Schema STRING_SCHEMA = Schema.builder().addStringField("string").build();
    static final Schema INTEGER_SCHEMA = Schema.builder().addInt32Field("integer").build();
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    private void tryGetters(SchemaRegistry registry) throws NoSuchSchemaException {
      assertEquals(STRING_SCHEMA, registry.getSchema(String.class));
      assertEquals(STRING_SCHEMA, registry.getSchema(TypeDescriptors.strings()));
      assertEquals(
          Row.withSchema(STRING_SCHEMA).addValue("foobar").build(),
          registry.getToRowFunction(String.class).apply("foobar"));
      assertEquals(
          Row.withSchema(STRING_SCHEMA).addValue("foobar").build(),
          registry.getToRowFunction(TypeDescriptors.strings()).apply("foobar"));
  
      assertEquals(INTEGER_SCHEMA, registry.getSchema(Integer.class));
      assertEquals(INTEGER_SCHEMA, registry.getSchema(TypeDescriptors.integers()));
      assertEquals(
          Row.withSchema(INTEGER_SCHEMA).addValue(42).build(),
          registry.getToRowFunction(Integer.class).apply(42));
      assertEquals(
          Row.withSchema(INTEGER_SCHEMA).addValue(42).build(),
          registry.getToRowFunction(TypeDescriptors.integers()).apply(42));
  
      thrown.expect(NoSuchSchemaException.class);
      registry.getSchema(Double.class);
    }
  
    @Test
    public void testRegisterForClass() throws NoSuchSchemaException {
      SchemaRegistry registry = SchemaRegistry.createDefault();
      registry.registerSchemaForClass(
          String.class,
          STRING_SCHEMA,
          s -> Row.withSchema(STRING_SCHEMA).addValue(s).build(),
          r -> r.getString("string"));
      registry.registerSchemaForClass(
          Integer.class,
          INTEGER_SCHEMA,
          s -> Row.withSchema(INTEGER_SCHEMA).addValue(s).build(),
          r -> r.getInt32("integer"));
      tryGetters(registry);
    }
  
    @Test
    public void testRegisterForType() throws NoSuchSchemaException {
      SchemaRegistry registry = SchemaRegistry.createDefault();
      registry.registerSchemaForType(
          TypeDescriptors.strings(),
          STRING_SCHEMA,
          s -> Row.withSchema(STRING_SCHEMA).addValue(s).build(),
          r -> r.getString("string"));
      registry.registerSchemaForType(
          TypeDescriptors.integers(),
          INTEGER_SCHEMA,
          s -> Row.withSchema(INTEGER_SCHEMA).addValue(s).build(),
          r -> r.getInt32("integer"));
      tryGetters(registry);
    }
  
    /** A test SchemaProvider. */
    public static final class Provider implements SchemaProvider {
      @Override
      public <T> Schema schemaFor(TypeDescriptor<T> typeDescriptor) {
        if (typeDescriptor.equals(TypeDescriptors.strings())) {
          return STRING_SCHEMA;
        } else if (typeDescriptor.equals(TypeDescriptors.integers())) {
          return INTEGER_SCHEMA;
        } else {
          return null;
        }
      }
  
      @Override
      public <T> SerializableFunction<T, Row> toRowFunction(TypeDescriptor<T> typeDescriptor) {
        return v -> Row.withSchema(schemaFor(typeDescriptor)).addValue(v).build();
      }
  
      @Override
      public <T> SerializableFunction<Row, T> fromRowFunction(TypeDescriptor<T> typeDescriptor) {
        return r -> r.getValue(0);
      }
    }
  
    @Test
    public void testRegisterProvider() throws NoSuchSchemaException {
      SchemaRegistry registry = SchemaRegistry.createDefault();
      registry.registerSchemaProvider(new Provider());
      tryGetters(registry);
    }
  
    static class TestSchemaClass {}
  
    static final class TestAutoProvider implements SchemaProvider {
      @Override
      public <T> Schema schemaFor(TypeDescriptor<T> typeDescriptor) {
        if (typeDescriptor.equals(TypeDescriptor.of(TestSchemaClass.class))) {
          return EMPTY_SCHEMA;
        }
        return null;
      }
  
      @Override
      public <T> SerializableFunction<T, Row> toRowFunction(TypeDescriptor<T> typeDescriptor) {
        if (typeDescriptor.equals(TypeDescriptor.of(TestSchemaClass.class))) {
          return v -> Row.withSchema(EMPTY_SCHEMA).build();
        }
        return null;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public <T> SerializableFunction<Row, T> fromRowFunction(TypeDescriptor<T> typeDescriptor) {
        if (typeDescriptor.equals(TypeDescriptor.of(TestSchemaClass.class))) {
          return r -> (T) new TestSchemaClass();
        }
        return null;
      }
    }
  
    /** A @link SchemaProviderRegistrar} for testing. */
    @AutoService(SchemaProviderRegistrar.class)
    public static class TestSchemaProviderRegistrar implements SchemaProviderRegistrar {
      @Override
      public List<SchemaProvider> getSchemaProviders() {
        return ImmutableList.of(new TestAutoProvider());
      }
    }
  
    @Test
    public void testAutoSchemaProvider() throws NoSuchSchemaException {
      SchemaRegistry registry = SchemaRegistry.createDefault();
      assertEquals(EMPTY_SCHEMA, registry.getSchema(TestSchemaClass.class));
    }
  
    @DefaultSchema(TestDefaultSchemaProvider.class)
    static class TestDefaultSchemaClass {}
  
    /** A test schema provider. */
    public static final class TestDefaultSchemaProvider implements SchemaProvider {
      @Override
      public <T> Schema schemaFor(TypeDescriptor<T> typeDescriptor) {
        if (typeDescriptor.equals(TypeDescriptor.of(TestDefaultSchemaClass.class))) {
          return EMPTY_SCHEMA;
        }
        return null;
      }
  
      @Override
      public <T> SerializableFunction<T, Row> toRowFunction(TypeDescriptor<T> typeDescriptor) {
        if (typeDescriptor.equals(TypeDescriptor.of(TestDefaultSchemaClass.class))) {
          return v -> Row.withSchema(EMPTY_SCHEMA).build();
        }
        return null;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public <T> SerializableFunction<Row, T> fromRowFunction(TypeDescriptor<T> typeDescriptor) {
        if (typeDescriptor.equals(TypeDescriptor.of(TestDefaultSchemaClass.class))) {
          return r -> (T) new TestSchemaClass();
        }
        return null;
      }
    }
  
    @Test
    public void testDefaultSchemaProvider() throws NoSuchSchemaException {
      SchemaRegistry registry = SchemaRegistry.createDefault();
      assertEquals(EMPTY_SCHEMA, registry.getSchema(TestDefaultSchemaClass.class));
    }
  
    @Test
    public void testRegisterPojo() throws NoSuchSchemaException {
      SchemaRegistry registry = SchemaRegistry.createDefault();
      registry.registerPOJO(SimplePOJO.class);
      Schema schema = registry.getSchema(SimplePOJO.class);
      assertTrue(SIMPLE_POJO_SCHEMA.equivalent(schema));
    }
  
    @Test
    public void testRegisterJavaBean() throws NoSuchSchemaException {
      SchemaRegistry registry = SchemaRegistry.createDefault();
      registry.registerJavaBean(SimpleBean.class);
      Schema schema = registry.getSchema(SimpleBean.class);
      assertTrue(SIMPLE_BEAN_SCHEMA.equivalent(schema));
    }
  
    @Test
    public void testGetSchemaCoder() throws NoSuchSchemaException {
      SchemaRegistry registry = SchemaRegistry.createDefault();
      registry.registerJavaBean(SimpleBean.class);
  
      Schema schema = registry.getSchema(SimpleBean.class);
      SerializableFunction<SimpleBean, Row> toRowFunction =
          registry.getToRowFunction(SimpleBean.class);
      SerializableFunction<Row, SimpleBean> fromRowFunction =
          registry.getFromRowFunction(SimpleBean.class);
      SchemaCoder schemaCoder = registry.getSchemaCoder(SimpleBean.class);
  
      assertTrue(schema.equivalent(schemaCoder.getSchema()));
      assertTrue(toRowFunction.equals(schemaCoder.getToRowFunction()));
      assertTrue(fromRowFunction.equals(schemaCoder.getFromRowFunction()));
  
      thrown.expect(NoSuchSchemaException.class);
      registry.getSchemaCoder(Double.class);
    }
  
    @Test
    public void testGetSchemaProvider() throws NoSuchSchemaException {
      SchemaRegistry registry = SchemaRegistry.createDefault();
  
      SchemaProvider testDefaultSchemaProvider =
          registry.getSchemaProvider(TestDefaultSchemaClass.class);
      assertEquals(DefaultSchemaProvider.class, testDefaultSchemaProvider.getClass());
      assertEquals(
          TestDefaultSchemaProvider.class,
          ((DefaultSchemaProvider) testDefaultSchemaProvider)
              .getUnderlyingSchemaProvider(TestDefaultSchemaClass.class)
              .getClass());
  
      SchemaProvider autoValueSchemaProvider = registry.getSchemaProvider(TestAutoValue.class);
      assertEquals(DefaultSchemaProvider.class, autoValueSchemaProvider.getClass());
      assertEquals(
          AutoValueSchema.class,
          ((DefaultSchemaProvider) autoValueSchemaProvider)
              .getUnderlyingSchemaProvider(TestAutoValue.class)
              .getClass());
  
      SchemaProvider simpleBeanSchemaProvider = registry.getSchemaProvider(SimpleBean.class);
      assertEquals(DefaultSchemaProvider.class, simpleBeanSchemaProvider.getClass());
      assertEquals(
          JavaBeanSchema.class,
          ((DefaultSchemaProvider) simpleBeanSchemaProvider)
              .getUnderlyingSchemaProvider(SimpleBean.class)
              .getClass());
    }
  
    @DefaultSchema(AutoValueSchema.class)
    @AutoValue
    public abstract static class TestAutoValue {
      public static Builder builder() {
        return new AutoValue_SchemaRegistryTest_TestAutoValue.Builder();
      }
  
      public abstract String getStr();
  
      @AutoValue.Builder
      public abstract static class Builder {
        public abstract Builder setStr(String str);
  
        public abstract TestAutoValue build();
      }
    }
  }
  