1 files changed, 124 insertions, 0 deletions
diff --git a/src/main/java/org/onap/sdc/tosca/parser/config/ConfigurationManager.java b/src/main/java/org/onap/sdc/tosca/parser/config/ConfigurationManager.java
new file mode 100644
index 0000000..e0b9dc8
--- /dev/null
+++ b/src/main/java/org/onap/sdc/tosca/parser/config/ConfigurationManager.java
@@ -0,0 +1,124 @@
+package org.onap.sdc.tosca.parser.config;
+
+import com.google.common.base.Charsets;
+import com.google.common.io.Resources;
+import org.onap.sdc.tosca.parser.utils.YamlToObjectConverter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.HashMap;
+import java.util.Map;
+
+
+public class ConfigurationManager {
+
+	private static Logger log = LoggerFactory.getLogger(ConfigurationManager.class.getName());
+
+	private static final String CONFIGURATION_DIR = "config/";
+	private static volatile ConfigurationManager instance;
+
+
+	Map<String, Object> configurations = new HashMap<String, Object>();
+
+	private ConfigurationManager() {
+		initialConfigObjectsFromFiles();
+	}
+
+	private void initialConfigObjectsFromFiles() {
+		loadConfigurationClass(ErrorConfiguration.class);
+		loadConfigurationClass(Configuration.class);
+		loadConfigurationClass(JtoscaValidationIssueConfiguration.class);
+	}
+
+	private <T> void loadConfigurationClass(Class<T> clazz) {
+		T object = getObjectFromYaml(clazz);
+		configurations.put(clazz.getSimpleName(), object);
+	}
+
+	private <T> void loadConfigurationClass(Class<T> clazz, String fileName) {
+		T object = getObjectFromYaml(clazz,fileName);
+		configurations.put(clazz.getSimpleName(), object);
+	}
+
+	public static <T> T getObjectFromYaml(Class<T> className) {
+		return getObjectFromYaml(className, null);
+	}
+
+	public static <T> T getObjectFromYaml(Class<T> className, String fileName) {
+
+
+		String configFileName = fileName != null ? fileName : calculateFileName(className); ;
+
+		URL url = Resources.getResource(CONFIGURATION_DIR + configFileName);
+		String configFileContents = null;
+		try {
+			configFileContents = Resources.toString(url, Charsets.UTF_8);
+		} catch (IOException e) {
+			log.error("ConfigurationManager - Failed to load configuration file {}", configFileName, e);
+		}
+		YamlToObjectConverter yamlToObjectConverter = new YamlToObjectConverter();
+		T object = yamlToObjectConverter.convertFromString(configFileContents, className);
+
+		return object;
+	}
+
+
+	public static ConfigurationManager getInstance() {
+		if (instance == null) {
+			synchronized (ConfigurationManager.class) {
+				if (instance == null) {
+					instance = new ConfigurationManager();
+				}
+			}
+		}
+		return instance;
+	}
+
+	private static <T> String calculateFileName(Class<T> className) {
+
+		String[] words = className.getSimpleName().split("(?=\\p{Upper})");
+
+		StringBuilder builder = new StringBuilder();
+
+		// There cannot be a null value returned from "split" - words != null is
+		// redundant
+		// if (words != null) {
+		boolean isFirst = true;
+		for (int i = 0; i < words.length; i++) {
+
+			String word = words[i];
+			if (word != null && !word.isEmpty()) {
+				if (!isFirst) {
+					builder.append("-");
+				} else {
+					isFirst = false;
+				}
+				builder.append(words[i].toLowerCase());
+			}
+		}
+		return builder.toString() + ".yaml";
+
+		/*
+         * } else { return className.getSimpleName().toLowerCase() + Constants.YAML_SUFFIX; }
+		 */
+
+	}
+
+	public ErrorConfiguration getErrorConfiguration() {
+		return (ErrorConfiguration) configurations.get((ErrorConfiguration.class.getSimpleName()));
+	}
+	public JtoscaValidationIssueConfiguration getJtoscaValidationIssueConfiguration() {
+		return (JtoscaValidationIssueConfiguration) configurations.get((JtoscaValidationIssueConfiguration.class.getSimpleName()));
+	}
+	public void setJtoscaValidationIssueConfiguration(String fileName) {
+		loadConfigurationClass(JtoscaValidationIssueConfiguration.class, fileName);
+	}
+	public Configuration getConfiguration() {
+		return (Configuration) configurations.get((Configuration.class.getSimpleName()));
+	}
+	public void setErrorConfiguration(String fileName) {
+		loadConfigurationClass(ErrorConfiguration.class, fileName);
+	}
+}