CRS class

Author: bosborn

src/main/java/mil/nga/oapi/features/json/Crs.java

@@ -0,0 +1,169 @@
+package mil.nga.oapi.features.json;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Coordinate Reference System
+ * 
+ * http://www.opengis.net/def/crs/{authority}/{version}/{code}
+ * 
+ * @author osbornb
+ */
+public class Crs {
+
+	/**
+	 * CRS pattern
+	 */
+	public static final Pattern PATTERN = Pattern
+			.compile("http.+/([^/]+)/([^/]+)/([^/]+)$");
+
+	/**
+	 * CRS pattern authority group
+	 */
+	public static final int PATTERN_AUTHORITY_GROUP = 1;
+
+	/**
+	 * CRS pattern code group
+	 */
+	public static final int PATTERN_VERSION_GROUP = 2;
+
+	/**
+	 * CRS pattern code group
+	 */
+	public static final int PATTERN_CODE_GROUP = 3;
+
+	/**
+	 * Base CRS URL
+	 */
+	public static final String BASE_URL = "http://www.opengis.net/def/crs";
+
+	/**
+	 * CRS Authority
+	 */
+	private String authority;
+
+	/**
+	 * CRS Version
+	 */
+	private String version;
+
+	/**
+	 * CRS Code
+	 */
+	private String code;
+
+	/**
+	 * Constructor
+	 */
+	public Crs() {
+
+	}
+
+	/**
+	 * Constructor
+	 * 
+	 * @param crs
+	 *            CRS URL
+	 */
+	public Crs(String crs) {
+		setCrs(crs);
+	}
+
+	/**
+	 * Set the CRS
+	 * 
+	 * @param crs
+	 *            CRS URL
+	 * @return true if a valid CRS and values were set
+	 */
+	public boolean setCrs(String crs) {
+
+		boolean valid = false;
+
+		Matcher matcher = PATTERN.matcher(crs);
+		if (matcher.find()) {
+			authority = matcher.group(PATTERN_AUTHORITY_GROUP);
+			version = matcher.group(PATTERN_VERSION_GROUP);
+			code = matcher.group(PATTERN_CODE_GROUP);
+			valid = true;
+		}
+
+		return valid;
+	}
+
+	/**
+	 * Get the authority
+	 * 
+	 * @return authority
+	 */
+	public String getAuthority() {
+		return authority;
+	}
+
+	/**
+	 * Set the authority
+	 * 
+	 * @param authority
+	 *            authority
+	 */
+	public void setAuthority(String authority) {
+		this.authority = authority;
+	}
+
+	/**
+	 * Get the version
+	 * 
+	 * @return version
+	 */
+	public String getVersion() {
+		return version;
+	}
+
+	/**
+	 * Set the version
+	 * 
+	 * @param version
+	 *            version
+	 */
+	public void setVersion(String version) {
+		this.version = version;
+	}
+
+	/**
+	 * Get the code
+	 * 
+	 * @return code
+	 */
+	public String getCode() {
+		return code;
+	}
+
+	/**
+	 * Set the code
+	 * 
+	 * @param code
+	 *            code
+	 */
+	public void setCode(String code) {
+		this.code = code;
+	}
+
+	/**
+	 * Determine if all parts of the CRS are set
+	 * 
+	 * @return true if valid
+	 */
+	public boolean isValid() {
+		return authority != null && version != null && code != null;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public String toString() {
+		return BASE_URL + "/" + authority + "/" + version + "/" + code;
+	}
+
+}