diff options
Diffstat (limited to 'sdc-distribution-client/src/main/java/org/onap/sdc/utils/YamlToObjectConverter.java')
-rw-r--r-- | sdc-distribution-client/src/main/java/org/onap/sdc/utils/YamlToObjectConverter.java | 155 |
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; + } +} |