1 files changed, 155 insertions, 0 deletions
diff --git a/sdc-distribution-client/src/main/java/org/onap/sdc/utils/YamlToObjectConverter.java b/sdc-distribution-client/src/main/java/org/onap/sdc/utils/YamlToObjectConverter.java
new file mode 100644
index 0000000..9c294d2
--- /dev/null
+++ b/sdc-distribution-client/src/main/java/org/onap/sdc/utils/YamlToObjectConverter.java
@@ -0,0 +1,155 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * sdc-distribution-client
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.sdc.utils;
+
+import java.beans.IntrospectionException;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.HashMap;
+
+import org.onap.sdc.utils.heat.HeatConfiguration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.yaml.snakeyaml.TypeDescription;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.introspector.BeanAccess;
+import org.yaml.snakeyaml.introspector.Property;
+import org.yaml.snakeyaml.introspector.PropertyUtils;
+
+public class YamlToObjectConverter {
+
+	private static Logger log = LoggerFactory
+			.getLogger(YamlToObjectConverter.class.getName());
+
+	private static HashMap<String, Yaml> yamls = new HashMap<String, Yaml>();
+
+	private static Yaml defaultYaml = new Yaml();
+
+	static {
+
+		org.yaml.snakeyaml.constructor.Constructor heatConstructor = new org.yaml.snakeyaml.constructor.Constructor(HeatConfiguration.class);
+		TypeDescription heatDescription = new TypeDescription(HeatConfiguration.class);
+		//heatDescription.putListPropertyType("parameters", HeatParameterConfiguration.class);
+		heatConstructor.addTypeDescription(heatDescription);
+		PropertyUtils propertyUtils = new PropertyUtils() {
+			@Override
+			//This is in order to workaround "default" field in HeatParameterEntry, since default is Java keyword
+			public Property getProperty(Class<? extends Object> type, String name, BeanAccess bAccess)
+					throws IntrospectionException {
+				name = name.substring(0, 1).toLowerCase() + name.substring(1);
+				return super.getProperty(type, name, bAccess);
+			}
+
+		};
+		//Skip properties which are not found - we only are interested in "parameters"
+		propertyUtils.setSkipMissingProperties(true);
+		heatConstructor.setPropertyUtils(propertyUtils);
+
+		Yaml yaml = new Yaml(heatConstructor);
+
+		yamls.put(HeatConfiguration.class.getName(), yaml);
+
+	}
+
+	private static <T> Yaml getYamlByClassName(Class<T> className) {
+
+		Yaml yaml = yamls.get(className.getName());
+		if (yaml == null) {
+			yaml = defaultYaml;
+		}
+
+		return yaml;
+	}
+
+	public <T> T convert(String dirPath, Class<T> className,
+			String configFileName) {
+
+		T config = null;
+
+		try {
+
+			String fullFileName = dirPath + File.separator + configFileName;
+
+			config = convert(fullFileName, className);
+
+		} catch (Exception e) {
+			log.error("Failed to convert yaml file " + configFileName
+					+ " to object.", e);
+		} 
+
+		return config;
+	}
+
+	public <T> T convert(String fullFileName, Class<T> className) {
+
+		T config = null;
+
+		Yaml yaml = getYamlByClassName(className);
+
+		InputStream in = null;
+		try {
+
+			File f = new File(fullFileName);
+			if (false == f.exists()) {
+				log.warn("The file " + fullFileName
+						+ " cannot be found. Ignore reading configuration.");
+				return null;
+			}
+			in = Files.newInputStream(Paths.get(fullFileName));
+
+			config = yaml.loadAs(in, className);
+
+			// System.out.println(config.toString());
+		} catch (Exception e) {
+			log.error("Failed to convert yaml file " + fullFileName
+					+ " to object.", e);
+		} finally {
+			if (in != null) {
+				try {
+					in.close();
+				} catch (IOException e) {
+					// TODO Auto-generated catch block
+					e.printStackTrace();
+				}
+			}
+		}
+
+		return config;
+	}
+
+	public <T> T convertFromString(String yamlContents, Class<T> className) {
+
+		T config = null;
+
+		Yaml yaml = getYamlByClassName(className);
+
+		try {
+			config = yaml.loadAs(yamlContents, className);
+		} catch (Exception e){
+			log.error("Failed to convert YAML {} to object." , yamlContents, e);
+		}
+
+		return config;
+	}
+}