1 files changed, 174 insertions, 0 deletions
diff --git a/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/config/BasicSpringBootConfigurationImpl.java b/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/config/BasicSpringBootConfigurationImpl.java
new file mode 100644
index 00000000..8f3c558c
--- /dev/null
+++ b/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/config/BasicSpringBootConfigurationImpl.java
@@ -0,0 +1,174 @@
+package at.gv.egiz.eaaf.core.impl.config;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.CompositePropertySource;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.EnumerablePropertySource;
+import org.springframework.core.env.Environment;
+import org.springframework.core.env.PropertySource;
+
+import at.gv.egiz.eaaf.core.api.idp.IExtendedConfiguration;
+import at.gv.egiz.eaaf.core.impl.utils.KeyValueUtils;
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * Basic Spring based configuration implementation.
+ * 
+ * @author tlenz
+ *
+ */
+@Slf4j
+public abstract class BasicSpringBootConfigurationImpl implements IExtendedConfiguration {
+
+  public static final String PROP_CONFIG_ROOT_DIR = "core.configRootDir";
+  
+  @Autowired
+  private Environment env;
+  
+  @Override
+  public String getBasicConfiguration(final String key) {
+    if (StringUtils.isNotEmpty(key)) {
+      final String value = env.getProperty(addPrefixToKey(key));
+      if (value != null) {
+        return value.trim();
+      }
+    }
+
+    return null;
+  }
+
+  @Override
+  public String getBasicConfiguration(final String key, final String defaultValue) {
+    if (StringUtils.isNotEmpty(key)) {
+      final String value = env.getProperty(addPrefixToKey(key), defaultValue);
+      if (value != null) {
+        return value.trim();
+      }
+    }
+
+    return defaultValue;
+  }
+
+  @Override
+  public Map<String, String> getBasicConfigurationWithPrefix(final String prefix) {
+    final Map<String, String> configProps = getPropertiesStartingWith((ConfigurableEnvironment) env,
+        addPrefixToKey(prefix));
+    return KeyValueUtils.removePrefixFromKeys(configProps, addPrefixToKey(prefix) + ".");
+
+  }
+
+  @Override
+  public boolean getBasicConfigurationBoolean(final String key) {
+    return getBasicConfigurationBoolean(key, false);
+
+  }
+
+  @Override
+  public boolean getBasicConfigurationBoolean(final String key, final boolean defaultValue) {
+    final String value = getBasicConfiguration(key);
+    if (StringUtils.isNotEmpty(value)) {
+      return Boolean.valueOf(value.trim());
+    } else {
+      return defaultValue;
+    }
+  }
+
+  @Override
+  public URI getConfigurationRootDirectory() {
+    try {
+      return new URI(env.getRequiredProperty(addPrefixToKey(PROP_CONFIG_ROOT_DIR)));
+
+    } catch (IllegalStateException | URISyntaxException e) {
+      log.warn("ConfigRootDirectory is NOT set", e);
+      return null;
+
+    }
+  }
+  
+  /**
+   * Get a specific configuration-key prefix for this software implementation.
+   *
+   * @return
+   */
+  public abstract String getApplicationSpecificKeyPrefix();
+  
+  protected String addPrefixToKey(final String key) {
+    if (StringUtils.isNotEmpty(getApplicationSpecificKeyPrefix())) {
+      if (getApplicationSpecificKeyPrefix().endsWith(KeyValueUtils.KEY_DELIMITER)) {
+        return getApplicationSpecificKeyPrefix() + key;
+      } else {
+        return getApplicationSpecificKeyPrefix() + KeyValueUtils.KEY_DELIMITER + key;
+      }
+
+    }
+
+    return key;
+  }
+  
+  private static Map<String, String> getPropertiesStartingWith(final ConfigurableEnvironment aenv,
+      final String akeyPrefix) {
+    final Map<String, String> result = new HashMap<>();
+    final Map<String, Object> map = getAllProperties(aenv);
+
+    for (final Entry<String, Object> entry : map.entrySet()) {
+      final String key = entry.getKey();
+
+      if (key.startsWith(akeyPrefix)) {
+        result.put(key, (String) entry.getValue());
+      }
+    }
+
+    return result;
+  }
+
+  private static Map<String, Object> getAllProperties(final ConfigurableEnvironment aenv) {
+    final Map<String, Object> result = new HashMap<>();
+    aenv.getPropertySources().forEach(ps -> addAll(result, getAllProperties(ps)));
+    return result;
+
+  }
+
+  private static Map<String, Object> getAllProperties(final PropertySource<?> apropSource) {
+    final Map<String, Object> result = new HashMap<>();
+
+    if (apropSource instanceof CompositePropertySource) {
+      final CompositePropertySource cps = (CompositePropertySource) apropSource;
+      cps.getPropertySources().forEach(ps -> addAll(result, getAllProperties(ps)));
+      return result;
+    }
+
+    if (apropSource instanceof EnumerablePropertySource<?>) {
+      final EnumerablePropertySource<?> ps = (EnumerablePropertySource<?>) apropSource;
+      Arrays.asList(ps.getPropertyNames()).forEach(key -> result.put(key, ps.getProperty(key)));
+      return result;
+    }
+
+    // note: Most descendants of PropertySource are EnumerablePropertySource. There
+    // are some
+    // few others like JndiPropertySource or StubPropertySource
+    log.trace("Given PropertySource is instanceof " + apropSource.getClass().getName()
+        + " and cannot be iterated");
+
+    return result;
+
+  }
+
+  private static void addAll(final Map<String, Object> abase, final Map<String, Object> atoBeAdded) {
+    for (final Entry<String, Object> entry : atoBeAdded.entrySet()) {
+      if (abase.containsKey(entry.getKey())) {
+        continue;
+      }
+
+      abase.put(entry.getKey(), entry.getValue());
+    }
+  }
+
+}