private String getProperty()

in spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/PropertiesLauncher.java [405:451]

44 lines of code
11 McCabe index (conditional complexity)


	private String getProperty(String propertyKey, String manifestKey, String defaultValue) throws Exception {
		if (manifestKey == null) {
			manifestKey = propertyKey.replace('.', '-');
			manifestKey = toCamelCase(manifestKey);
		}
		String property = SystemPropertyUtils.getProperty(propertyKey);
		if (property != null) {
			String value = SystemPropertyUtils.resolvePlaceholders(this.properties, property);
			debug("Property '" + propertyKey + "' from environment: " + value);
			return value;
		}
		if (this.properties.containsKey(propertyKey)) {
			String value = SystemPropertyUtils.resolvePlaceholders(this.properties,
					this.properties.getProperty(propertyKey));
			debug("Property '" + propertyKey + "' from properties: " + value);
			return value;
		}
		try {
			if (this.home != null) {
				// Prefer home dir for MANIFEST if there is one
				try (ExplodedArchive archive = new ExplodedArchive(this.home, false)) {
					Manifest manifest = archive.getManifest();
					if (manifest != null) {
						String value = manifest.getMainAttributes().getValue(manifestKey);
						if (value != null) {
							debug("Property '" + manifestKey + "' from home directory manifest: " + value);
							return SystemPropertyUtils.resolvePlaceholders(this.properties, value);
						}
					}
				}
			}
		}
		catch (IllegalStateException ex) {
			// Ignore
		}
		// Otherwise try the parent archive
		Manifest manifest = createArchive().getManifest();
		if (manifest != null) {
			String value = manifest.getMainAttributes().getValue(manifestKey);
			if (value != null) {
				debug("Property '" + manifestKey + "' from archive manifest: " + value);
				return SystemPropertyUtils.resolvePlaceholders(this.properties, value);
			}
		}
		return (defaultValue != null) ? SystemPropertyUtils.resolvePlaceholders(this.properties, defaultValue)
				: defaultValue;
	}