Support of Lombok annotated ConfigurationProperties

Previously, no configuration properties were discovered on a class using
lombok instead of regular getters/setters.

This commit adds a support for some of the lombok annotations,
specifically that is @Data, @Getter and @Setter. Provides the same
semantic as what lombok is generating.

Closes gh-2114

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

@@ -17,7 +17,6 @@
 package org.springframework.boot.configurationprocessor;
 
 import java.io.IOException;
-
 import javax.annotation.processing.SupportedAnnotationTypes;
 import javax.annotation.processing.SupportedSourceVersion;
 import javax.lang.model.SourceVersion;
@@ -25,7 +24,11 @@ import javax.lang.model.SourceVersion;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
+
 import org.springframework.boot.configurationprocessor.metadata.ConfigurationMetadata;
+import org.springframework.boot.configurationsample.lombok.LombokSimpleDataProperties;
+import org.springframework.boot.configurationsample.lombok.LombokExplicitProperties;
+import org.springframework.boot.configurationsample.lombok.LombokSimpleProperties;
 import org.springframework.boot.configurationsample.method.EmptyTypeMethodConfig;
 import org.springframework.boot.configurationsample.method.InvalidMethodConfig;
 import org.springframework.boot.configurationsample.method.MethodAndClassConfig;
@@ -286,13 +289,49 @@ public class ConfigurationMetadataAnnotationProcessorTests {
 		assertThat(metadata, not(containsProperty("excluded.writer-array")));
 	}
 
+	@Test
+	public void lombokDataProperties() throws Exception {
+		ConfigurationMetadata metadata = compile(LombokSimpleDataProperties.class);
+		assertSimpleLombokProperties(metadata, LombokSimpleDataProperties.class, "data");
+	}
+
+	@Test
+	public void lombokSimpleProperties() throws Exception {
+		ConfigurationMetadata metadata = compile(LombokSimpleProperties.class);
+		assertSimpleLombokProperties(metadata, LombokSimpleProperties.class, "simple");
+	}
+
+	@Test
+	public void lombokExplicitProperties() throws Exception {
+		ConfigurationMetadata metadata = compile(LombokExplicitProperties.class);
+		assertSimpleLombokProperties(metadata, LombokExplicitProperties.class, "explicit");
+	}
+
+	private void assertSimpleLombokProperties(ConfigurationMetadata metadata, Class<?> source, String prefix) {
+		assertThat(metadata, containsGroup(prefix).fromSource(source));
+		assertThat(metadata, not(containsProperty(prefix + ".id")));
+		assertThat(
+				metadata,
+				containsProperty(prefix + ".name", String.class)
+						.fromSource(source)
+						.withDescription("Name description."));
+		assertThat(metadata, containsProperty(prefix + ".description"));
+		assertThat(metadata, containsProperty(prefix + ".counter"));
+		assertThat(metadata,
+				containsProperty(prefix + ".number").fromSource(source)
+						.withDefaultValue(is(0))
+						.withDeprecated());
+		assertThat(metadata, containsProperty(prefix + ".items"));
+		assertThat(metadata, not(containsProperty(prefix + ".ignored")));
+	}
+
 	private ConfigurationMetadata compile(Class<?>... types) throws IOException {
 		TestConfigurationMetadataAnnotationProcessor processor = new TestConfigurationMetadataAnnotationProcessor();
 		new TestCompiler(this.temporaryFolder).getTask(types).call(processor);
 		return processor.getMetadata();
 	}
 
-	@SupportedAnnotationTypes({ "*" })
+	@SupportedAnnotationTypes({"*"})
 	@SupportedSourceVersion(SourceVersion.RELEASE_6)
 	private static class TestConfigurationMetadataAnnotationProcessor extends
 			ConfigurationMetadataAnnotationProcessor {

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

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2012-2014 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 java.util.ArrayList;
+import java.util.List;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import org.springframework.boot.configurationsample.ConfigurationProperties;
+
+/**
+ * Configuration properties using lombok @Getter/@Setter at field level.
+ *
+ * @author Stephane Nicoll
+ */
+@ConfigurationProperties(prefix = "explicit")
+public class LombokExplicitProperties {
+
+	@Getter
+	private final String id = "super-id";
+
+	/**
+	 * Name description.
+	 */
+	@Getter @Setter
+	private String name;
+
+	@Getter @Setter
+	private String description;
+
+	@Getter @Setter
+	private Integer counter;
+
+	@Deprecated @Getter @Setter
+	private Integer number = 0;
+
+	@Getter
+	private final List<String> items = new ArrayList<String>();
+
+	// Should be ignored if no annotation is set
+	private String ignored;
+
+}

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

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2012-2014 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 java.util.ArrayList;
+import java.util.List;
+
+import lombok.Data;
+
+import org.springframework.boot.configurationsample.ConfigurationProperties;
+
+/**
+ * Configuration properties using lombok @Data.
+ *
+ * @author Stephane Nicoll
+ */
+@Data
+@ConfigurationProperties(prefix = "data")
+public class LombokSimpleDataProperties {
+
+	private final String id = "super-id";
+
+	/**
+	 * Name description.
+	 */
+	private String name;
+
+	private String description;
+
+	private Integer counter;
+
+	@Deprecated
+	private Integer number = 0;
+
+	private final List<String> items = new ArrayList<String>();
+
+	private final String ignored = "foo";
+
+}

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

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2012-2014 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 java.util.ArrayList;
+import java.util.List;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import org.springframework.boot.configurationsample.ConfigurationProperties;
+
+/**
+ * Configuration properties using lombok @Getter/@Setter at class level.
+ *
+ * @author Stephane Nicoll
+ */
+@Getter
+@Setter
+@ConfigurationProperties(prefix = "simple")
+public class LombokSimpleProperties {
+
+	private final String id = "super-id";
+
+	/**
+	 * Name description.
+	 */
+	private String name;
+
+	private String description;
+
+	private Integer counter;
+
+	@Deprecated
+	private Integer number = 0;
+
+	private final List<String> items = new ArrayList<String>();
+
+	private final String ignored = "foo";
+
+}