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| 1 | +packageorg.utplsql.api; |
| 2 | + |
| 3 | +importjavax.annotation.Nullable; |
| 4 | + |
| 5 | +/** |
| 6 | + * This class provides an easy way to get environmental variables. |
| 7 | + * This is mainly to improve testability but also to standardize the way how utPLSQL API and CLI read from |
| 8 | + * environment. |
| 9 | + * <p> |
| 10 | + * Variables are obtained from the following scopes in that order (chain breaks as soon as a value is obtained): |
| 11 | + * <ul> |
| 12 | + * <li>Properties (System.getProperty())</li> |
| 13 | + * <li>Environment (System.getEnv())</li> |
| 14 | + * <li>Default value</li> |
| 15 | + * </ul> |
| 16 | + * <p> |
| 17 | + * An empty string is treated the same as null. |
| 18 | + * |
| 19 | + * @author pesse |
| 20 | + */ |
| 21 | +publicclassEnvironmentVariableUtil { |
| 22 | + |
| 23 | +privateEnvironmentVariableUtil() { |
| 24 | + } |
| 25 | + |
| 26 | +/** |
| 27 | + * Returns the value for a given key from environment (see class description) |
| 28 | + * |
| 29 | + * @param key Key of environment or property value |
| 30 | + * @return Environment value or null |
| 31 | + */ |
| 32 | +publicstaticStringgetEnvValue(Stringkey) { |
| 33 | +returngetEnvValue(key,null); |
| 34 | + } |
| 35 | + |
| 36 | +/** |
| 37 | + * Returns the value for a given key from environment or a default value (see class description) |
| 38 | + * |
| 39 | + * @param key Key of environment or property value |
| 40 | + * @param defaultValue Default value if nothing found |
| 41 | + * @return Environment value or defaultValue |
| 42 | + */ |
| 43 | +publicstaticStringgetEnvValue(Stringkey,@NullableStringdefaultValue) { |
| 44 | + |
| 45 | +Stringval =System.getProperty(key); |
| 46 | +if (val ==null ||val.isEmpty())val =System.getenv(key); |
| 47 | +if (val ==null ||val.isEmpty())val =defaultValue; |
| 48 | + |
| 49 | +returnval; |
| 50 | + } |
| 51 | + |
| 52 | + |
| 53 | +} |