Refactor and Test ConfigProfileGenerator

Refactor
- Add Builder to ConfigProfileGenerator. Reason: Constructor had too
  many arguments.
- Move Conversion from Map to Config from ConfigProfileGenerator into
  dedicated 'ConvertMapToConfig' Class; Reason: I expect additional
  configuration properties and I don't want those changes to affect
  the ConfigProfileGenerator (or it's test cases)
- Move Access to Spring's env into facade to simplify ConfigProfileGenerator.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/main/java/at/gv/egiz/moazs/preprocess/SpringPropertiesFacade.java b/src/main/java/at/gv/egiz/moazs/preprocess/SpringPropertiesFacade.java
new file mode 100644
index 0000000..4cce7e0
--- /dev/null
+++ b/src/main/java/at/gv/egiz/moazs/preprocess/SpringPropertiesFacade.java
@@ -0,0 +1,39 @@
+package at.gv.egiz.moazs.preprocess;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.EnumerablePropertySource;
+import org.springframework.core.env.MutablePropertySources;
+import org.springframework.stereotype.Component;
+
+import java.util.Arrays;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+
+@Component
+public class SpringPropertiesFacade {
+
+    @Autowired
+    private ConfigurableEnvironment env;
+
+    /**
+     * Collect all properties from Spring environment and return them as a stream.
+     *
+     * inspired by https://stackoverflow.com/questions/23506471/spring-access-all-environment-properties-as-a-map-or-properties-object/42521523#42521523
+     * @author pedorro
+     * @return
+     */
+    public Stream<String> getPropertyNames() {
+
+        MutablePropertySources propSrcs = env.getPropertySources();
+
+        return StreamSupport.stream(propSrcs.spliterator(), false)
+                .filter(ps -> ps instanceof EnumerablePropertySource)
+                .map(ps -> ((EnumerablePropertySource) ps).getPropertyNames())
+                .flatMap(Arrays::stream);
+    }
+
+    public String getProperty(String name) {
+        return env.getProperty(name);
+    }
+}