From 9aef8a1b83869bbd17b07ed8d7fcafb1989b05fa Mon Sep 17 00:00:00 2001
From: jakubs <jakubs>
Date: Wed, 29 Jul 2015 14:05:14 +0000
Subject: [PATCH] SSDM-2153: reuse and close readers in thumbnail generation
SVN: 34390
---
.../cisd/common/utilities/IdentitySet.java | 50 +++++++++++++++++++
1 file changed, 50 insertions(+)
create mode 100644 common/source/java/ch/systemsx/cisd/common/utilities/IdentitySet.java
diff --git a/common/source/java/ch/systemsx/cisd/common/utilities/IdentitySet.java b/common/source/java/ch/systemsx/cisd/common/utilities/IdentitySet.java
new file mode 100644
index 00000000000..eeff4f4c741
--- /dev/null
+++ b/common/source/java/ch/systemsx/cisd/common/utilities/IdentitySet.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2015 ETH Zuerich, CISD
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package ch.systemsx.cisd.common.utilities;
+
+import java.util.IdentityHashMap;
+import java.util.LinkedList;
+
+/**
+ * Implementation of a set (not implementing java Set interface) that uses objects identity instead of hashCode and equals
+ *
+ * @author Jakub Straszewski
+ */
+public class IdentitySet<T>
+{
+ IdentityHashMap<T, Object> map = new IdentityHashMap<>();
+
+ public void add(T t)
+ {
+ map.put(t, t);
+ }
+
+ public boolean contains(T t)
+ {
+ return map.containsKey(t);
+ }
+
+ public void remove(T t)
+ {
+ map.remove(t);
+ }
+
+ public Iterable<T> getItems()
+ {
+ return new LinkedList<T>(map.keySet());
+ }
+}
--
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