Accommodate with Lombok generation ordering

Previously, if lombok was running before the configuration metadata
annotation processor, duplicated keys were created as both the
getter/setter and the special lombok handling applied.

This commit makes sure to be lenient by removing duplicate metadata
entries. This commit also makes sure to identify the getter of a
nested group if present. That way, the sourceMethod is set consistently
and avoid the creation of a duplicate group.

Closes gh-8886

spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessor.java

@@ -294,7 +294,8 @@ public class ConfigurationMetadataAnnotationProcessor extends AbstractProcessor
 			String name = entry.getKey();
 			VariableElement field = entry.getValue();
 			if (isLombokField(field, element)) {
-				processNestedType(prefix, element, source, name, null, field,
+				ExecutableElement getter = members.getPublicGetter(name, field.asType());
+				processNestedType(prefix, element, source, name, getter, field,
 						field.asType());
 			}
 		}

spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/MetadataCollector.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 package org.springframework.boot.configurationprocessor;
 
-import java.util.ArrayList;
 import java.util.HashSet;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
 
@@ -39,7 +39,7 @@ import org.springframework.boot.configurationprocessor.metadata.ItemMetadata;
  */
 public class MetadataCollector {
 
-	private final List<ItemMetadata> metadataItems = new ArrayList<ItemMetadata>();
+	private final Set<ItemMetadata> metadataItems = new LinkedHashSet<ItemMetadata>();
 
 	private final ProcessingEnvironment processingEnvironment;
 

spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/TypeElementMembers.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -171,6 +171,22 @@ class TypeElementMembers {
 		return Collections.unmodifiableMap(this.publicGetters);
 	}
 
+	public ExecutableElement getPublicGetter(String name, TypeMirror type) {
+		ExecutableElement candidate = this.publicGetters.get(name);
+		if (candidate != null) {
+			TypeMirror returnType = candidate.getReturnType();
+			if (this.env.getTypeUtils().isSameType(returnType, type)) {
+				return candidate;
+			}
+			TypeMirror alternative = this.typeUtils.getWrapperOrPrimitiveFor(type);
+			if (alternative != null &&
+					this.env.getTypeUtils().isSameType(returnType, alternative)) {
+				return candidate;
+			}
+		}
+		return null;
+	}
+
 	public ExecutableElement getPublicSetter(String name, TypeMirror type) {
 		List<ExecutableElement> candidates = this.publicSetters.get(name);
 		if (candidates != null) {

spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/ItemMetadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,7 +24,7 @@ package org.springframework.boot.configurationprocessor.metadata;
  * @since 1.2.0
  * @see ConfigurationMetadata
  */
-public class ItemMetadata implements Comparable<ItemMetadata> {
+public final class ItemMetadata implements Comparable<ItemMetadata> {
 
 	private ItemType itemType;
 
@@ -143,13 +143,59 @@ public class ItemMetadata implements Comparable<ItemMetadata> {
 		return string.toString();
 	}
 
-	protected final void buildToStringProperty(StringBuilder string, String property,
+	protected void buildToStringProperty(StringBuilder string, String property,
 			Object value) {
 		if (value != null) {
 			string.append(" ").append(property).append(":").append(value);
 		}
 	}
 
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) {
+			return true;
+		}
+		if (o == null || getClass() != o.getClass()) {
+			return false;
+		}
+		ItemMetadata other = (ItemMetadata) o;
+		return nullSafeEquals(this.itemType, other.itemType)
+				&& nullSafeEquals(this.name, other.name)
+				&& nullSafeEquals(this.type, other.type)
+				&& nullSafeEquals(this.description, other.description)
+				&& nullSafeEquals(this.sourceType, other.sourceType)
+				&& nullSafeEquals(this.sourceMethod, other.sourceMethod)
+				&& nullSafeEquals(this.defaultValue, other.defaultValue)
+				&& nullSafeEquals(this.deprecation, other.deprecation);
+	}
+
+	@Override
+	public int hashCode() {
+		int result = nullSafeHashCode(this.itemType);
+		result = 31 * result + nullSafeHashCode(this.name);
+		result = 31 * result + nullSafeHashCode(this.type);
+		result = 31 * result + nullSafeHashCode(this.description);
+		result = 31 * result + nullSafeHashCode(this.sourceType);
+		result = 31 * result + nullSafeHashCode(this.sourceMethod);
+		result = 31 * result + nullSafeHashCode(this.defaultValue);
+		result = 31 * result + nullSafeHashCode(this.deprecation);
+		return result;
+	}
+
+	private boolean nullSafeEquals(Object o1, Object o2) {
+		if (o1 == o2) {
+			return true;
+		}
+		if (o1 == null || o2 == null) {
+			return false;
+		}
+		return o1.equals(o2);
+	}
+
+	private int nullSafeHashCode(Object o) {
+		return (o == null ? 0 : o.hashCode());
+	}
+
 	@Override
 	public int compareTo(ItemMetadata o) {
 		return getName().compareTo(o.getName());

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessorTests.java

@@ -40,6 +40,7 @@ import org.springframework.boot.configurationsample.incremental.FooProperties;
 import org.springframework.boot.configurationsample.incremental.RenamedBarProperties;
 import org.springframework.boot.configurationsample.lombok.LombokExplicitProperties;
 import org.springframework.boot.configurationsample.lombok.LombokInnerClassProperties;
+import org.springframework.boot.configurationsample.lombok.LombokInnerClassWithGetterProperties;
 import org.springframework.boot.configurationsample.lombok.LombokSimpleDataProperties;
 import org.springframework.boot.configurationsample.lombok.LombokSimpleProperties;
 import org.springframework.boot.configurationsample.lombok.SimpleLombokPojo;
@@ -487,6 +488,20 @@ public class ConfigurationMetadataAnnotationProcessorTests {
 		assertThat(metadata).isNotEqualTo(Metadata.withGroup("config.fourth"));
 	}
 
+	@Test
+	public void lombokInnerClassWithGetterProperties() throws IOException {
+		ConfigurationMetadata metadata =
+				compile(LombokInnerClassWithGetterProperties.class);
+		assertThat(metadata).has(Metadata.withGroup("config")
+				.fromSource(LombokInnerClassWithGetterProperties.class));
+		assertThat(metadata).has(Metadata.withGroup("config.first")
+				.ofType(LombokInnerClassWithGetterProperties.Foo.class)
+				.fromSourceMethod("getFirst()")
+				.fromSource(LombokInnerClassWithGetterProperties.class));
+		assertThat(metadata).has(Metadata.withProperty("config.first.name"));
+		assertThat(metadata.getItems()).hasSize(3);
+	}
+
 	@Test
 	public void mergingOfAdditionalProperty() throws Exception {
 		ItemMetadata property = ItemMetadata.newProperty(null, "foo", "java.lang.String",

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/Metadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -80,6 +80,8 @@ public final class Metadata {
 
 		private final Class<?> sourceType;
 
+		private final String sourceMethod;
+
 		private final String description;
 
 		private final Object defaultValue;
@@ -87,16 +89,17 @@ public final class Metadata {
 		private final ItemDeprecation deprecation;
 
 		public MetadataItemCondition(ItemType itemType, String name) {
-			this(itemType, name, null, null, null, null, null);
+			this(itemType, name, null, null, null, null, null, null);
 		}
 
 		public MetadataItemCondition(ItemType itemType, String name, String type,
-				Class<?> sourceType, String description, Object defaultValue,
+				Class<?> sourceType, String sourceMethod, String description,
-				ItemDeprecation deprecation) {
+				Object defaultValue, ItemDeprecation deprecation) {
 			this.itemType = itemType;
 			this.name = name;
 			this.type = type;
 			this.sourceType = sourceType;
+			this.sourceMethod = sourceMethod;
 			this.description = description;
 			this.defaultValue = defaultValue;
 			this.deprecation = deprecation;
@@ -112,6 +115,9 @@ public final class Metadata {
 			if (this.sourceType != null) {
 				description.append(" with sourceType:").append(this.sourceType);
 			}
+			if (this.sourceMethod != null) {
+				description.append(" with sourceMethod:").append(this.sourceMethod);
+			}
 			if (this.defaultValue != null) {
 				description.append(" with defaultValue:").append(this.defaultValue);
 			}
@@ -137,6 +143,10 @@ public final class Metadata {
 					&& !this.sourceType.getName().equals(itemMetadata.getSourceType())) {
 				return false;
 			}
+			if (this.sourceMethod != null
+					&& !this.sourceMethod.equals(itemMetadata.getSourceMethod())) {
+				return false;
+			}
 			if (this.defaultValue != null && !ObjectUtils
 					.nullSafeEquals(this.defaultValue, itemMetadata.getDefaultValue())) {
 				return false;
@@ -157,40 +167,50 @@ public final class Metadata {
 
 		public MetadataItemCondition ofType(Class<?> dataType) {
 			return new MetadataItemCondition(this.itemType, this.name, dataType.getName(),
-					this.sourceType, this.description, this.defaultValue,
+					this.sourceType, this.sourceMethod, this.description,
-					this.deprecation);
+					this.defaultValue, this.deprecation);
 		}
 
 		public MetadataItemCondition ofType(String dataType) {
 			return new MetadataItemCondition(this.itemType, this.name, dataType,
-					this.sourceType, this.description, this.defaultValue,
+					this.sourceType, this.sourceMethod, this.description,
-					this.deprecation);
+					this.defaultValue, this.deprecation);
 		}
 
 		public MetadataItemCondition fromSource(Class<?> sourceType) {
 			return new MetadataItemCondition(this.itemType, this.name, this.type,
-					sourceType, this.description, this.defaultValue, this.deprecation);
+					sourceType, this.sourceMethod, this.description, this.defaultValue,
+					this.deprecation);
+		}
+
+		public MetadataItemCondition fromSourceMethod(String sourceMethod) {
+			return new MetadataItemCondition(this.itemType, this.name, this.type,
+					this.sourceType, sourceMethod, this.description, this.defaultValue,
+					this.deprecation);
 		}
 
 		public MetadataItemCondition withDescription(String description) {
 			return new MetadataItemCondition(this.itemType, this.name, this.type,
-					this.sourceType, description, this.defaultValue, this.deprecation);
+					this.sourceType, this.sourceMethod, description, this.defaultValue,
+					this.deprecation);
 		}
 
 		public MetadataItemCondition withDefaultValue(Object defaultValue) {
 			return new MetadataItemCondition(this.itemType, this.name, this.type,
-					this.sourceType, this.description, defaultValue, this.deprecation);
+					this.sourceType, this.sourceMethod, this.description, defaultValue,
+					this.deprecation);
 		}
 
 		public MetadataItemCondition withDeprecation(String reason, String replacement) {
 			return new MetadataItemCondition(this.itemType, this.name, this.type,
-					this.sourceType, this.description, this.defaultValue,
+					this.sourceType, this.sourceMethod, this.description,
-					new ItemDeprecation(reason, replacement));
+					this.defaultValue, new ItemDeprecation(reason, replacement));
 		}
 
 		public MetadataItemCondition withNoDeprecation() {
 			return new MetadataItemCondition(this.itemType, this.name, this.type,
-					this.sourceType, this.description, this.defaultValue, null);
+					this.sourceType, this.sourceMethod, this.description,
+					this.defaultValue, null);
 		}
 
 		private ItemMetadata getFirstItemWithName(ConfigurationMetadata metadata,

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationsample/lombok/LombokInnerClassWithGetterProperties.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2012-2017 the original author or authors.
+ *
+ * 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 org.springframework.boot.configurationsample.lombok;
+
+import lombok.Data;
+
+import org.springframework.boot.configurationsample.ConfigurationProperties;
+
+@Data
+@ConfigurationProperties(prefix = "config")
+@SuppressWarnings("unused")
+public class LombokInnerClassWithGetterProperties {
+
+	private final Foo first = new Foo();
+
+	public Foo getFirst() {
+		return this.first;
+	}
+
+	@Data
+	public static class Foo {
+
+		private String name;
+
+	}
+
+}