Expose hints for Maps

This commit fixes the json parser so that hints for maps is also made
available.

Closes gh-5152

spring-boot-tools/spring-boot-configuration-metadata/src/main/java/org/springframework/boot/configurationmetadata/ConfigurationMetadataHint.java

 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2016 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.
@@ -27,12 +27,34 @@ import java.util.List;
  */
 class ConfigurationMetadataHint {
 
+	private static final String KEY_SUFFIX = ".keys";
+
+	private static final String VALUE_SUFFIX = ".values";
+
 	private String id;
 
 	private final List<ValueHint> valueHints = new ArrayList<ValueHint>();
 
 	private final List<ValueProvider> valueProviders = new ArrayList<ValueProvider>();
 
+	public boolean isMapKeyHints() {
+		return (this.id != null && this.id.endsWith(KEY_SUFFIX));
+	}
+
+	public boolean isMapValueHints() {
+		return (this.id != null && this.id.endsWith(VALUE_SUFFIX));
+	}
+
+	public String resolveId() {
+		if (isMapKeyHints()) {
+			return this.id.substring(0, this.id.length() - KEY_SUFFIX.length());
+		}
+		if (isMapValueHints()) {
+			return this.id.substring(0, this.id.length() - VALUE_SUFFIX.length());
+		}
+		return this.id;
+	}
+
 	public String getId() {
 		return this.id;
 	}

spring-boot-tools/spring-boot-configuration-metadata/src/main/java/org/springframework/boot/configurationmetadata/ConfigurationMetadataProperty.java

 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2016 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.
@@ -17,7 +17,6 @@
 package org.springframework.boot.configurationmetadata;
 
 import java.io.Serializable;
-import java.util.ArrayList;
 import java.util.List;
 
 /**
@@ -44,9 +43,7 @@ public class ConfigurationMetadataProperty implements Serializable {
 
 	private Object defaultValue;
 
-	private final List<ValueHint> valueHints = new ArrayList<ValueHint>();
-
-	private final List<ValueProvider> valueProviders = new ArrayList<ValueProvider>();
+	private final Hints hints = new Hints();
 
 	private Deprecation deprecation;
 
@@ -136,14 +133,24 @@ public class ConfigurationMetadataProperty implements Serializable {
 		this.defaultValue = defaultValue;
 	}
 
+	/**
+	 * Return the hints of this item.
+	 * @return the hints
+	 */
+	public Hints getHints() {
+		return this.hints;
+	}
+
 	/**
 	 * The list of well-defined values, if any. If no extra {@link ValueProvider provider}
 	 * is specified, these values are to be considered a closed-set of the available
 	 * values for this item.
 	 * @return the value hints
+	 * @see #getHints()
 	 */
+	@Deprecated
 	public List<ValueHint> getValueHints() {
-		return this.valueHints;
+		return this.hints.getValueHints();
 	}
 
 	/**
@@ -151,9 +158,11 @@ public class ConfigurationMetadataProperty implements Serializable {
 	 * {@link ValueProvider} is enabled for an item: the first in the list that is
 	 * supported should be used.
 	 * @return the value providers
+	 * @see #getHints()
 	 */
+	@Deprecated
 	public List<ValueProvider> getValueProviders() {
-		return this.valueProviders;
+		return this.hints.getValueProviders();
 	}
 
 	/**

spring-boot-tools/spring-boot-configuration-metadata/src/main/java/org/springframework/boot/configurationmetadata/ConfigurationMetadataRepositoryJsonBuilder.java

 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2016 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.
@@ -127,8 +127,22 @@ public final class ConfigurationMetadataRepositoryJsonBuilder {
 		for (ConfigurationMetadataHint hint : metadata.getHints()) {
 			ConfigurationMetadataProperty property = allProperties.get(hint.getId());
 			if (property != null) {
-				property.getValueHints().addAll(hint.getValueHints());
-				property.getValueProviders().addAll(hint.getValueProviders());
+				property.getHints().getValueHints().addAll(hint.getValueHints());
+				property.getHints().getValueProviders().addAll(hint.getValueProviders());
+			}
+			else {
+				String id = hint.resolveId();
+				property = allProperties.get(id);
+				if (property != null) {
+					if (hint.isMapKeyHints()) {
+						property.getHints().getKeyHints().addAll(hint.getValueHints());
+						property.getHints().getKeyProviders().addAll(hint.getValueProviders());
+					}
+					else {
+						property.getHints().getValueHints().addAll(hint.getValueHints());
+						property.getHints().getValueProviders().addAll(hint.getValueProviders());
+					}
+				}
 			}
 		}
 		return repository;

spring-boot-tools/spring-boot-configuration-metadata/src/main/java/org/springframework/boot/configurationmetadata/Hints.java

+/*
+ * Copyright 2012-2016 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.configurationmetadata;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Hints of an item to provide the list of values and/or the name of the provider
+ * responsible to identify suitable values. If the type of the related item is
+ * a {@link java.util.Map} it can have both key and value hints.
+ *
+ * @author Stephane Nicoll
+ * @since 1.4.0
+ */
+public class Hints {
+
+	private final List<ValueHint> keyHints = new ArrayList<ValueHint>();
+
+	private final List<ValueProvider> keyProviders = new ArrayList<ValueProvider>();
+
+	private final List<ValueHint> valueHints = new ArrayList<ValueHint>();
+
+	private final List<ValueProvider> valueProviders = new ArrayList<ValueProvider>();
+
+	/**
+	 * The list of well-defined keys, if any. Only applicable if the type of the related
+	 * item is a {@link java.util.Map}. If no extra {@link ValueProvider provider}
+	 * is specified, these values are to be considered a closed-set of the available
+	 * keys for the map.
+	 * @return the key hints
+	 */
+	public List<ValueHint> getKeyHints() {
+		return this.keyHints;
+	}
+
+	/**
+	 * The value providers that are applicable to the keys of this item. Only applicable
+	 * if the type of the related item is a {@link java.util.Map}. Only one
+	 * {@link ValueProvider} is enabled for a key: the first in the list that is
+	 * supported should be used.
+	 * @return the key providers
+	 */
+	public List<ValueProvider> getKeyProviders() {
+		return this.keyProviders;
+	}
+
+	/**
+	 * The list of well-defined values, if any. If no extra {@link ValueProvider provider}
+	 * is specified, these values are to be considered a closed-set of the available
+	 * values for this item.
+	 * @return the value hints
+	 */
+	public List<ValueHint> getValueHints() {
+		return this.valueHints;
+	}
+
+	/**
+	 * The value providers that are applicable to this item. Only one
+	 * {@link ValueProvider} is enabled for an item: the first in the list that is
+	 * supported should be used.
+	 * @return the value providers
+	 */
+	public List<ValueProvider> getValueProviders() {
+		return this.valueProviders;
+	}
+
+}

spring-boot-tools/spring-boot-configuration-metadata/src/test/java/org/springframework/boot/configurationmetadata/ConfigurationMetadataRepositoryJsonBuilderTests.java

 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2016 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.
@@ -55,6 +55,23 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 		}
 	}
 
+	@Test
+	public void hintsOnMaps() throws IOException {
+		InputStream map = getInputStreamFor("map");
+		try {
+			ConfigurationMetadataRepository repo = ConfigurationMetadataRepositoryJsonBuilder
+					.create(map).build();
+			validateMap(repo);
+			assertThat(repo.getAllGroups()).hasSize(1);
+			contains(repo.getAllProperties(), "spring.map.first", "spring.map.second",
+					"spring.map.keys", "spring.map.values");
+			assertThat(repo.getAllProperties()).hasSize(4);
+		}
+		finally {
+			map.close();
+		}
+	}
+
 	@Test
 	public void severalRepositoriesNoConflict() throws IOException {
 		InputStream foo = getInputStreamFor("foo");
@@ -182,10 +199,44 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 		validatePropertyHints(repo.getAllProperties().get("spring.bar.counter"), 0, 0);
 	}
 
+	private void validateMap(ConfigurationMetadataRepository repo) {
+		ConfigurationMetadataGroup group = repo.getAllGroups().get("spring.map");
+		ConfigurationMetadataSource source = group.getSources().get("org.acme.Map");
+		contains(source.getProperties(), "spring.map.first", "spring.map.second",
+				"spring.map.keys", "spring.map.values");
+		assertThat(source.getProperties()).hasSize(4);
+		ConfigurationMetadataProperty first = repo.getAllProperties().get("spring.map.first");
+		assertThat(first.getHints().getKeyHints()).hasSize(2);
+		assertThat(first.getHints().getValueProviders()).hasSize(0);
+		assertThat(first.getHints().getKeyHints().get(0).getValue()).isEqualTo("one");
+		assertThat(first.getHints().getKeyHints().get(0).getDescription()).isEqualTo("First.");
+		assertThat(first.getHints().getKeyHints().get(1).getValue()).isEqualTo("two");
+		assertThat(first.getHints().getKeyHints().get(1).getDescription()).isEqualTo("Second.");
+		ConfigurationMetadataProperty second = repo.getAllProperties().get("spring.map.second");
+		assertThat(second.getHints().getValueHints()).hasSize(2);
+		assertThat(second.getHints().getValueProviders()).hasSize(0);
+		assertThat(second.getHints().getValueHints().get(0).getValue()).isEqualTo("42");
+		assertThat(second.getHints().getValueHints().get(0).getDescription()).isEqualTo("Choose me.");
+		assertThat(second.getHints().getValueHints().get(1).getValue()).isEqualTo("24");
+		assertThat(second.getHints().getValueHints().get(1).getDescription()).isNull();
+		ConfigurationMetadataProperty keys = repo.getAllProperties().get("spring.map.keys");
+		assertThat(keys.getHints().getValueHints()).hasSize(0);
+		assertThat(keys.getHints().getValueProviders()).hasSize(1);
+		assertThat(keys.getHints().getValueProviders().get(0).getName()).isEqualTo("any");
+		ConfigurationMetadataProperty values = repo.getAllProperties().get("spring.map.values");
+		assertThat(values.getHints().getValueHints()).hasSize(0);
+		assertThat(values.getHints().getValueProviders()).hasSize(1);
+		assertThat(values.getHints().getValueProviders().get(0).getName()).isEqualTo("handle-as");
+		assertThat(values.getHints().getValueProviders().get(0).getParameters()).hasSize(1);
+		assertThat(values.getHints().getValueProviders().get(0).getParameters().get("target"))
+				.isEqualTo("java.lang.Integer");
+	}
+
+
 	private void validatePropertyHints(ConfigurationMetadataProperty property,
 			int valueHints, int valueProviders) {
-		assertThat(property.getValueHints().size()).isEqualTo(valueHints);
-		assertThat(property.getValueHints().size()).isEqualTo(valueProviders);
+		assertThat(property.getHints().getValueHints().size()).isEqualTo(valueHints);
+		assertThat(property.getHints().getValueProviders().size()).isEqualTo(valueProviders);
 	}
 
 	private void contains(Map<String, ?> source, String... keys) {

spring-boot-tools/spring-boot-configuration-metadata/src/test/resources/metadata/configuration-metadata-map.json

+{
+  "groups": [
+    {
+      "name": "spring.map",
+      "type": "org.acme.Map",
+      "sourceType": "org.acme.config.MapApp",
+      "sourceMethod": "map()",
+      "description": "This is Map."
+    }
+  ],
+  "properties": [
+    {
+      "name": "spring.map.first",
+      "type": "java.util.Map<String,String>",
+      "sourceType": "org.acme.Map"
+    },
+    {
+      "name": "spring.map.second",
+      "type": "java.util.Map<String,String>",
+      "sourceType": "org.acme.Map"
+    },
+    {
+      "name": "spring.map.keys",
+      "type": "java.lang.String",
+      "sourceType": "org.acme.Map"
+    },
+    {
+      "name": "spring.map.values",
+      "type": "java.lang.String",
+      "sourceType": "org.acme.Map"
+    }
+  ],
+  "hints": [
+    {
+      "name": "spring.map.first.keys",
+      "values": [
+        {
+          "value": "one",
+          "description": "First."
+        },
+        {
+          "value": "two",
+          "description": "Second."
+        }
+      ]
+    },
+    {
+      "name": "spring.map.second.values",
+      "values": [
+        {
+          "value": "42",
+          "description": "Choose me."
+        },
+        {
+          "value": "24"
+        }
+      ]
+    },
+    {
+      "name": "spring.map.keys",
+      "providers": [
+        {
+          "name": "any"
+        }
+      ]
+    },
+    {
+      "name": "spring.map.values",
+      "providers": [
+        {
+          "name": "handle-as",
+          "parameters": {
+            "target": "java.lang.Integer"
+          }
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file