Massive package refactoring

[lgpl/argeo-commons.git] / org.argeo.api.cms / src / org / argeo / api / cms / transaction / AbstractWorkingCopy.java

diff --git a/org.argeo.api.cms/src/org/argeo/api/cms/transaction/AbstractWorkingCopy.java b/org.argeo.api.cms/src/org/argeo/api/cms/transaction/AbstractWorkingCopy.java
new file mode 100644 (file)
index 0000000..928acad
--- /dev/null
+++ b/org.argeo.api.cms/src/org/argeo/api/cms/transaction/AbstractWorkingCopy.java
@@ -0,0 +1,48 @@
+package org.argeo.api.cms.transaction;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public abstract class AbstractWorkingCopy<DATA, ATTR, ID> implements WorkingCopy<DATA, ATTR, ID> {
+       private Map<ID, DATA> newData = new HashMap<ID, DATA>();
+       private Map<ID, ATTR> modifiedData = new HashMap<ID, ATTR>();
+       private Map<ID, DATA> deletedData = new HashMap<ID, DATA>();
+
+       protected abstract ID getId(DATA data);
+
+       protected abstract ATTR cloneAttributes(DATA data);
+
+       public void cleanUp() {
+               // clean collections
+               newData.clear();
+               newData = null;
+               modifiedData.clear();
+               modifiedData = null;
+               deletedData.clear();
+               deletedData = null;
+       }
+
+       public boolean noModifications() {
+               return newData.size() == 0 && modifiedData.size() == 0 && deletedData.size() == 0;
+       }
+
+       public void startEditing(DATA user) {
+               ID id = getId(user);
+               if (modifiedData.containsKey(id))
+                       throw new IllegalStateException("Already editing " + id);
+               modifiedData.put(id, cloneAttributes(user));
+       }
+
+       public Map<ID, DATA> getNewData() {
+               return newData;
+       }
+
+       public Map<ID, DATA> getDeletedData() {
+               return deletedData;
+       }
+
+       public Map<ID, ATTR> getModifiedData() {
+               return modifiedData;
+       }
+
+}