001 package de.deepamehta.core.service;
002
003 import java.util.HashMap;
004 import java.util.Map;
005
006
007
008 /**
009 * Cookies sent by a client.
010 */
011 public class ClientState {
012
013 // ---------------------------------------------------------------------------------------------- Instance Variables
014
015 private Map<String, String> values = new HashMap();
016
017 // ---------------------------------------------------------------------------------------------------- Constructors
018
019 /**
020 * Converts a "Cookie" header value (String) to a map (key=String, value=String).
021 * E.g. "dm4_workspace_id=123; dm4_topicmap_id=234" => {"dm4_workspace_id"="123", "dm4_topicmap_id"="234"}
022 * <p>
023 * Called by JAX-RS container to create a ClientState from a "Cookie" @HeaderParam
024 */
025 public ClientState(String cookie) {
026 if (cookie != null) {
027 for (String value : cookie.split("; ")) {
028 String[] val = value.split("=", 2); // Limit 2 ensures 2nd element in case of empty value
029 values.put(val[0], val[1]);
030 }
031 }
032 }
033
034 // -------------------------------------------------------------------------------------------------- Public Methods
035
036 /**
037 * Returns the value of the cookie for the given name, or throws an exception if no such cookie exists.
038 */
039 public String get(String name) {
040 String value = values.get(name);
041 //
042 if (value == null) {
043 throw new RuntimeException("Missing \"" + name + "\" cookie (clientState=" + this + ")");
044 }
045 //
046 return value;
047 }
048
049 /**
050 * Convenience method to access a long value of the cookie for the given name, or throws an exception
051 * if no such cookie exists.
052 */
053 public long getLong(String name) {
054 try {
055 return Long.parseLong(get(name));
056 } catch (Exception e) {
057 throw new RuntimeException("Getting a long value for the \"" + name + "\" cookie failed", e);
058 }
059 }
060
061 // ---
062
063 /**
064 * Checks if there is a cookie with the given name.
065 */
066 public boolean has(String name) {
067 return values.get(name) != null;
068 }
069
070 // ---
071
072 @Override
073 public String toString() {
074 return values.toString();
075 }
076 }