X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.api.cms%2Fsrc%2Forg%2Fargeo%2Fapi%2Fcms%2Ftransaction%2FAbstractWorkingCopy.java;fp=org.argeo.api.cms%2Fsrc%2Forg%2Fargeo%2Fapi%2Fcms%2Ftransaction%2FAbstractWorkingCopy.java;h=928acad2cc122932276cf14e69e93637c3873bcf;hb=54df376a9c2dd458a82eaa09bfbb718fe699dd0d;hp=0000000000000000000000000000000000000000;hpb=3c1cdc594d954520b14646102b366290bdad58c7;p=lgpl%2Fargeo-commons.git

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
index 000000000..928acad2c
--- /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;
+	}
+
+}