TDI-35231: Performance of tfileOutputMSXML component

https://jira.talendforge.org/browse/TDI-35231

main/plugins/org.talend.librariesmanager/resources/java/routines/system/XMLGroupCache.java

@@ -0,0 +1,146 @@
+package routines.system;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.dom4j.Element;
+
+public class XMLGroupCache {
+
+	private Map<Key, Element> cache;
+
+	private static Map<String, XMLGroupCache> instanceCache = new HashMap<>();
+
+	public synchronized static XMLGroupCache getInstance(String instanceKey) {
+		XMLGroupCache instance = instanceCache.get(instanceKey);
+		if (instance == null) {
+			instance = new XMLGroupCache();
+			instanceCache.put(instanceKey, instance);
+		}
+		return instance;
+	}
+
+	public synchronized static void release(String instanceKey) {
+		XMLGroupCache instance = instanceCache.get(instanceKey);
+		if (instance != null) {
+			instanceCache.remove(instanceKey);
+		}
+	}
+
+	private XMLGroupCache() {
+		cache = new HashMap<>();
+	}
+
+	public class Key {
+		String path;
+		Map<String, String> defaultNamespaceUriTOPrefix;
+		Map<String, String> declaredNamespacesMapping;
+		List<String> values;
+
+		public int hashCode() {
+			int hash = path.hashCode(); 
+			
+			hash = 31 * hash + (defaultNamespaceUriTOPrefix == null ? 0 : defaultNamespaceUriTOPrefix.hashCode());
+			hash = 31 * hash + (declaredNamespacesMapping == null ? 0 : declaredNamespacesMapping.hashCode());
+			hash = 31 * hash + (values == null ? 0 : values.hashCode());
+			
+			return hash;
+		}
+
+		public boolean equals(Object obj) {
+			if (obj == this) {
+				return true;
+			}
+
+			if (!(obj instanceof Key)) {
+				return false;
+			}
+
+			Key key = (Key) obj;
+			if (!path.equals(key.path)) {
+				return false;
+			}
+
+			if (!equalMap(defaultNamespaceUriTOPrefix, key.defaultNamespaceUriTOPrefix)) {
+				return false;
+			}
+
+			if (!equalMap(declaredNamespacesMapping, key.declaredNamespacesMapping)) {
+				return false;
+			}
+
+			if (equalList(values, key.values)) {
+				return true;
+			}
+
+			return false;
+		}
+	}
+
+	@SuppressWarnings("rawtypes")
+	private boolean equalMap(Map m1, Map m2) {
+		if (m1 == m2) {
+			return true;
+		}
+
+		if (isEmptyOrNull(m1) && isEmptyOrNull(m2)) {
+			return true;
+		}
+
+		if (m1 != null && m2 != null) {
+			return m1.equals(m2);
+		}
+
+		return false;
+	}
+
+	@SuppressWarnings("rawtypes")
+	private boolean isEmptyOrNull(Map m) {
+		return m == null || m.isEmpty();
+	}
+
+	@SuppressWarnings("rawtypes")
+	private boolean equalList(List l1, List l2) {
+		if (l1 == l2) {
+			return true;
+		}
+
+		if (isEmptyOrNull(l1) && isEmptyOrNull(l2)) {
+			return true;
+		}
+
+		if (l1 != null && l2 != null) {
+			return l1.equals(l2);
+		}
+
+		return false;
+
+	}
+
+	@SuppressWarnings("rawtypes")
+	private boolean isEmptyOrNull(List l) {
+		return l == null || l.isEmpty();
+	}
+
+	public Key createKey(String path, Map<String, String> defaultNamespaceUriTOPrefix,
+			Map<String, String> declaredNamespacesMapping, List<String> values) {
+		Key key = new Key();
+
+		key.path = path;
+		key.defaultNamespaceUriTOPrefix = defaultNamespaceUriTOPrefix;
+		key.declaredNamespacesMapping = declaredNamespacesMapping;
+		key.values = values;
+
+		return key;
+	}
+
+	public void put(Key key, Element value) {
+		cache.put(key, value);
+	}
+
+	public Element get(Key key) {
+		return cache.get(key);
+	}
+
+}