From cb95ee0650d3bbc3fe619af0a687f09d39a0a07f Mon Sep 17 00:00:00 2001
From: Christof Rabensteiner <christof.rabensteiner@iaik.tugraz.at>
Date: Wed, 15 May 2019 10:21:41 +0200
Subject: Refactor ConfigProfileGenerator

- Add Source for Code Snippet.
- Break down generate() into smaller chunks.
---
 .../moazs/preprocess/ConfigProfileGenerator.java   | 45 ++++++++++++++--------
 1 file changed, 29 insertions(+), 16 deletions(-)

(limited to 'src/main/java/at/gv/egiz/moazs/preprocess')

diff --git a/src/main/java/at/gv/egiz/moazs/preprocess/ConfigProfileGenerator.java b/src/main/java/at/gv/egiz/moazs/preprocess/ConfigProfileGenerator.java
index a0cf766..21d97fc 100644
--- a/src/main/java/at/gv/egiz/moazs/preprocess/ConfigProfileGenerator.java
+++ b/src/main/java/at/gv/egiz/moazs/preprocess/ConfigProfileGenerator.java
@@ -2,10 +2,7 @@ package at.gv.egiz.moazs.preprocess;
 
 import at.gv.zustellung.app2mzs.xsd.ConfigType;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.core.env.AbstractEnvironment;
-import org.springframework.core.env.EnumerablePropertySource;
-import org.springframework.core.env.Environment;
-import org.springframework.core.env.MutablePropertySources;
+import org.springframework.core.env.*;
 import org.springframework.stereotype.Component;
 
 import java.util.Arrays;
@@ -13,6 +10,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Set;
+import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
 
 import static at.gv.zustellung.app2mzs.xsd.ConfigType.configTypeBuilder;
@@ -27,33 +25,40 @@ public class ConfigProfileGenerator {
     private static final String TNVZ_REQUEST_KEY = "perform-query-person-request";
     private static final String MSG_URL_KEY = "msg.url";
 
-    private final Environment env;
+    private final ConfigurableEnvironment env;
     private final ConfigProfileMerger merger;
 
     @Autowired
-    public ConfigProfileGenerator(Environment env, ConfigProfileMerger merger) {
+    public ConfigProfileGenerator(ConfigurableEnvironment env, ConfigProfileMerger merger) {
         this.env = env;
         this.merger = merger;
     }
 
     public Map<String, ConfigType> generate() {
-        MutablePropertySources propSrcs = ((AbstractEnvironment) env).getPropertySources();
 
-        Map<String, Set<String>> groupedKeys = StreamSupport.stream(propSrcs.spliterator(), false)
-                .filter(ps -> ps instanceof EnumerablePropertySource)
-                .map(ps -> ((EnumerablePropertySource) ps).getPropertyNames())
-                .flatMap(Arrays::stream)
+        var groupedKeys = getStreamOfPropertyKeysFromEnv()
                 .filter(this::isConfigurationProfileProperty)
                 .map(this::removePrefix)
                 .collect(groupingBy(this::keepPrefix, mapping(this::removePrefix, toSet())));
 
-        Map<String, ConfigType> profiles = groupedKeys.entrySet().stream()
-                .collect(toMap(Entry::getKey, this::createConfig));
+        var profiles = groupedKeys.entrySet().stream()
+                .collect(toMap(Entry::getKey, this::createConfigFromEnv));
 
         var defaultProfile = profiles.get("default");
 
-        return profiles.entrySet().stream()
-                .collect(toUnmodifiableMap(Entry::getKey, e -> merger.merge(e.getValue(), defaultProfile)));
+        return mergeProfiles(profiles, defaultProfile);
+    }
+
+    // @author pedorro
+    // inspired by https://stackoverflow.com/questions/23506471/spring-access-all-environment-properties-as-a-map-or-properties-object/42521523#42521523
+    private Stream<String> getStreamOfPropertyKeysFromEnv() {
+
+        MutablePropertySources propSrcs = env.getPropertySources();
+
+        return StreamSupport.stream(propSrcs.spliterator(), false)
+                .filter(ps -> ps instanceof EnumerablePropertySource)
+                .map(ps -> ((EnumerablePropertySource) ps).getPropertyNames())
+                .flatMap(Arrays::stream);
     }
 
     private boolean isConfigurationProfileProperty(String propName) {
@@ -68,7 +73,7 @@ public class ConfigProfileGenerator {
         return name.substring(name.indexOf('.') + 1);
     }
 
-    private ConfigType createConfig(Entry<String, Set<String>> entry) {
+    private ConfigType createConfigFromEnv(Entry<String, Set<String>> entry) {
 
         var profile = entry.getKey();
 
@@ -94,4 +99,12 @@ public class ConfigProfileGenerator {
                 .build();
     }
 
+    private Map<String, ConfigType> mergeProfiles(Map<String, ConfigType> profiles, ConfigType defaultProfile) {
+        return profiles.entrySet().stream()
+                .collect(toUnmodifiableMap(
+                        Entry::getKey,
+                        e -> merger.merge(e.getValue(), defaultProfile)));
+    }
+
+
 }
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