diff options
Diffstat (limited to 'utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/EnvVarFileResolver.java')
-rwxr-xr-x | utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/EnvVarFileResolver.java | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/EnvVarFileResolver.java b/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/EnvVarFileResolver.java new file mode 100755 index 000000000..518fb30d3 --- /dev/null +++ b/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/EnvVarFileResolver.java @@ -0,0 +1,76 @@ +/*- + * ============LICENSE_START======================================================= + * onap + * ================================================================================ + * Copyright (C) 2016 - 2017 ONAP + * ================================================================================ + * 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.ccsdk.sli.core.utils; + +import com.google.common.base.Strings; + +import java.io.File; +import java.nio.file.Paths; +import java.util.Optional; + +/** + * Resolves properties files relative to the directory identified by the <code>SDNC_CONFIG_DIR</code> + * environment variable. If a system property with the same name is set it is given precedence. + */ +public abstract class EnvVarFileResolver implements PropertiesFileResolver { + + /** + * Key for environment variable representing the configuration directory + */ + private final String propertyKey; + + private final String successMessage; + + public EnvVarFileResolver(final String successMessage, final String propertyKey) { + this.successMessage = successMessage; + this.propertyKey = propertyKey; + } + + /** + * Parse a properties file location based on System environment variable + * + * @return an Optional File containing the location if it exists, or an empty Optional + */ + @Override + public Optional<File> resolveFile(final String filename) { + // attempt to read the system property first + String propDirectoryFromEnvVariable = System.getProperty(propertyKey); + + if(propDirectoryFromEnvVariable == null) { + // attempt to resolve the property directory from the corresponding environment variable + propDirectoryFromEnvVariable = System.getenv(propertyKey); + } + + final File fileFromEnvVariable; + if (!Strings.isNullOrEmpty(propDirectoryFromEnvVariable)) { + fileFromEnvVariable = Paths.get(propDirectoryFromEnvVariable).resolve(filename).toFile(); + if(PathValidator.isValidPropertiesPath(fileFromEnvVariable.getAbsolutePath()) && fileFromEnvVariable.exists()) { + return Optional.of(fileFromEnvVariable); + } + } + return Optional.empty(); + } + + @Override + public String getSuccessfulResolutionMessage() { + return this.successMessage; + } +} |