#495 Add Support For Set Types In Config Beans

config/src/main/java/com/typesafe/config/impl/ConfigBeanImpl.java

@@ -11,9 +11,11 @@
 import java.lang.reflect.Type;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.time.Duration;
+import java.util.Set;
 
 import com.typesafe.config.Config;
 import com.typesafe.config.ConfigObject;
@@ -160,6 +162,8 @@ private static Object getValue(Class<?> beanClass, Type parameterType, Class<?>
             return config.getAnyRef(configPropName);
         } else if (parameterClass == List.class) {
             return getListValue(beanClass, parameterType, parameterClass, config, configPropName);
+        } else if (parameterClass == Set.class) {
+            return getSetValue(beanClass, parameterType, parameterClass, config, configPropName);
         } else if (parameterClass == Map.class) {
             // we could do better here, but right now we don't.
             Type[] typeArgs = ((ParameterizedType)parameterType).getActualTypeArguments();
@@ -186,6 +190,10 @@ private static Object getValue(Class<?> beanClass, Type parameterType, Class<?>
         }
     }
 
+    private static Object getSetValue(Class<?> beanClass, Type parameterType, Class<?> parameterClass, Config config, String configPropName) {
+        return new HashSet((List) getListValue(beanClass, parameterType, parameterClass, config, configPropName));
+    }
+
     private static Object getListValue(Class<?> beanClass, Type parameterType, Class<?> parameterClass, Config config, String configPropName) {
         Type elementType = ((ParameterizedType)parameterType).getActualTypeArguments()[0];
 

config/src/test/java/beanconfig/SetsConfig.java

@@ -0,0 +1,139 @@
+package beanconfig;
+
+import com.typesafe.config.Config;
+import com.typesafe.config.ConfigMemorySize;
+import com.typesafe.config.ConfigObject;
+import com.typesafe.config.ConfigValue;
+
+import java.time.Duration;
+import java.util.Set;
+
+public class SetsConfig {
+
+    Set<Integer> empty;
+    Set<Integer> ofInt;
+    Set<String> ofString;
+    Set<Double> ofDouble;
+    Set<Long> ofLong;
+    Set<Object> ofNull;
+    Set<Boolean> ofBoolean;
+    Set<Object> ofObject;
+    Set<Config> ofConfig;
+    Set<ConfigObject> ofConfigObject;
+    Set<ConfigValue> ofConfigValue;
+    Set<Duration> ofDuration;
+    Set<ConfigMemorySize> ofMemorySize;
+    Set<StringsConfig> ofStringBean;
+
+    public Set<Integer> getEmpty() {
+        return empty;
+    }
+
+    public void setEmpty(Set<Integer> empty) {
+        this.empty = empty;
+    }
+
+    public Set<Integer> getOfInt() {
+        return ofInt;
+    }
+
+    public void setOfInt(Set<Integer> ofInt) {
+        this.ofInt = ofInt;
+    }
+
+    public Set<String> getOfString() {
+        return ofString;
+    }
+
+    public void setOfString(Set<String> ofString) {
+        this.ofString = ofString;
+    }
+
+    public Set<Double> getOfDouble() {
+        return ofDouble;
+    }
+
+    public void setOfDouble(Set<Double> ofDouble) {
+        this.ofDouble = ofDouble;
+    }
+
+    public Set<Object> getOfNull() {
+        return ofNull;
+    }
+
+    public void setOfNull(Set<Object> ofNull) {
+        this.ofNull = ofNull;
+    }
+
+    public Set<Boolean> getOfBoolean() {
+        return ofBoolean;
+    }
+
+    public void setOfBoolean(Set<Boolean> ofBoolean) {
+        this.ofBoolean = ofBoolean;
+    }
+
+    public Set<Object> getOfObject() {
+        return ofObject;
+    }
+
+    public void setOfObject(Set<Object> ofObject) {
+        this.ofObject = ofObject;
+    }
+
+    public Set<Long> getOfLong() {
+        return ofLong;
+    }
+
+    public void setOfLong(Set<Long> ofLong) {
+        this.ofLong = ofLong;
+    }
+
+    public Set<Config> getOfConfig() {
+        return ofConfig;
+    }
+
+    public void setOfConfig(Set<Config> ofConfig) {
+        this.ofConfig = ofConfig;
+    }
+
+    public Set<ConfigObject> getOfConfigObject() {
+        return ofConfigObject;
+    }
+
+    public void setOfConfigObject(Set<ConfigObject> ofConfigObject) {
+        this.ofConfigObject = ofConfigObject;
+    }
+
+    public Set<ConfigValue> getOfConfigValue() {
+        return ofConfigValue;
+    }
+
+    public void setOfConfigValue(Set<ConfigValue> ofConfigValue) {
+        this.ofConfigValue = ofConfigValue;
+    }
+
+    public Set<Duration> getOfDuration() {
+        return ofDuration;
+    }
+
+    public void setOfDuration(Set<Duration> ofDuration) {
+        this.ofDuration = ofDuration;
+    }
+
+    public Set<ConfigMemorySize> getOfMemorySize() {
+        return ofMemorySize;
+    }
+
+    public void setOfMemorySize(Set<ConfigMemorySize> ofMemorySize) {
+        this.ofMemorySize = ofMemorySize;
+    }
+
+    public Set<StringsConfig> getOfStringBean() {
+        return ofStringBean;
+    }
+
+    public void setOfStringBean(Set<StringsConfig> ofStringBean) {
+        this.ofStringBean = ofStringBean;
+    }
+}

config/src/test/resources/beanconfig/beanconfig01.conf

@@ -101,5 +101,31 @@
       "valueObject": {
         "mandatoryValue": "notNull"
       }
+    },
+    "sets" : {
+      "empty" : [],
+      "ofInt" : [1, 2, 3, 2, 3],
+      "ofString" : [ ${strings.a}, ${strings.b}, ${strings.c} ],
+      "of-double" : [3.14, 4.14, 4.14, 5.14],
+      "of-long" : { "1" : 32, "2" : 42, "3" : 52 }, // object-to-list conversion
+      "ofNull" : [null, null, null],
+      "ofBoolean" : [true, false, false],
+      "ofArray" : [${arrays.ofString}, ${arrays.ofString}, ${arrays.ofString}],
+      "ofObject" : [${numbers}, ${booleans}, ${strings}],
+      "ofConfig" : [${numbers}, ${booleans}, ${strings}],
+      "ofConfigObject" : [${numbers}, ${booleans}, ${strings}],
+      "ofConfigValue" : [1, 2, "a"],
+      "ofDuration" : [1, 2h, 3 days],
+      "ofMemorySize" : [1024, 1M, 1G],
+      "ofStringBean" : [
+        {
+          abcd : "testAbcdOne"
+          yes : "testYesOne"
+        },
+        {
+          abcd : "testAbcdTwo"
+          yes : "testYesTwo"
+        }
+      ]
     }
 }

config/src/test/scala/com/typesafe/config/impl/ConfigBeanFactoryTest.scala

@@ -132,6 +132,39 @@ class ConfigBeanFactoryTest extends TestUtils {
         assertEquals(List(stringsConfigOne, stringsConfigTwo).asJava, beanConfig.getOfStringBean)
     }
 
+    @Test
+    def testCreateSet() {
+        val beanConfig: SetsConfig = ConfigBeanFactory.create(loadConfig().getConfig("sets"), classOf[SetsConfig])
+        assertNotNull(beanConfig)
+        assertEquals(Set().asJava, beanConfig.getEmpty)
+        assertEquals(Set(1, 2, 3).asJava, beanConfig.getOfInt)
+        assertEquals(Set(32L, 42L, 52L).asJava, beanConfig.getOfLong)
+        assertEquals(Set("a", "b", "c").asJava, beanConfig.getOfString)
+        assertEquals(3, beanConfig.getOfObject.size)
+        assertEquals(3, beanConfig.getOfDouble.size)
+        assertEquals(3, beanConfig.getOfConfig.size)
+        assertTrue(beanConfig.getOfConfig.iterator().next().isInstanceOf[Config])
+        assertEquals(3, beanConfig.getOfConfigObject.size)
+        assertTrue(beanConfig.getOfConfigObject.iterator().next().isInstanceOf[ConfigObject])
+        assertEquals(Set(intValue(1), intValue(2), stringValue("a")),
+            beanConfig.getOfConfigValue.asScala)
+        assertEquals(Set(Duration.ofMillis(1), Duration.ofHours(2), Duration.ofDays(3)),
+            beanConfig.getOfDuration.asScala)
+        assertEquals(Set(ConfigMemorySize.ofBytes(1024),
+            ConfigMemorySize.ofBytes(1048576),
+            ConfigMemorySize.ofBytes(1073741824)),
+            beanConfig.getOfMemorySize.asScala)
+
+        val stringsConfigOne = new StringsConfig();
+        stringsConfigOne.setAbcd("testAbcdOne")
+        stringsConfigOne.setYes("testYesOne")
+        val stringsConfigTwo = new StringsConfig();
+        stringsConfigTwo.setAbcd("testAbcdTwo")
+        stringsConfigTwo.setYes("testYesTwo")
+
+        assertEquals(Set(stringsConfigOne, stringsConfigTwo).asJava, beanConfig.getOfStringBean)
+    }
+
     @Test
     def testCreateDuration() {
         val beanConfig: DurationsConfig = ConfigBeanFactory.create(loadConfig().getConfig("durations"), classOf[DurationsConfig])