TemplateLocation Class — spring-boot Architecture

Source Code

core/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/template/TemplateLocation.java lines 32–82

public class TemplateLocation {

	private final String path;

	public TemplateLocation(String path) {
		Assert.notNull(path, "'path' must not be null");
		this.path = path;
	}

	/**
	 * Determine if this template location exists using the specified
	 * {@link ResourcePatternResolver}.
	 * @param resolver the resolver used to test if the location exists
	 * @return {@code true} if the location exists.
	 */
	public boolean exists(ResourcePatternResolver resolver) {
		Assert.notNull(resolver, "'resolver' must not be null");
		if (resolver.getResource(this.path).exists()) {
			return true;
		}
		try {
			return anyExists(resolver);
		}
		catch (IOException ex) {
			return false;
		}
	}

	private boolean anyExists(ResourcePatternResolver resolver) throws IOException {
		String searchPath = this.path;
		if (searchPath.startsWith(ResourceLoader.CLASSPATH_URL_PREFIX)) {
			searchPath = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX
					+ searchPath.substring(ResourceLoader.CLASSPATH_URL_PREFIX.length());
		}
		if (searchPath.startsWith(ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX)) {
			Resource[] resources = resolver.getResources(searchPath);
			for (Resource resource : resources) {
				if (resource.exists()) {
					return true;
				}
			}
		}
		return false;
	}

	@Override
	public String toString() {
		return this.path;
	}

}