Add StringSetDataExternalizer

Author: cedricziel

src/com/cedricziel/idea/typo3/index/externalizer/StringSetDataExternalizer.java

@@ -0,0 +1,37 @@
+package com.cedricziel.idea.typo3.index.externalizer;
+
+import com.intellij.util.io.DataExternalizer;
+import com.intellij.util.io.EnumeratorStringDescriptor;
+import gnu.trove.THashSet;
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.Set;
+import org.jetbrains.annotations.NotNull;
+
+public class StringSetDataExternalizer implements DataExternalizer<Set<String>> {
+    public StringSetDataExternalizer() {
+    }
+
+    public synchronized void save(@NotNull DataOutput out, Set<String> value) throws IOException {
+        out.writeInt(value.size());
+        Iterator var3 = value.iterator();
+
+        while(var3.hasNext()) {
+            String s = (String)var3.next();
+            EnumeratorStringDescriptor.INSTANCE.save(out, s);
+        }
+
+    }
+
+    public synchronized Set<String> read(@NotNull DataInput in) throws IOException {
+        THashSet set = new THashSet();
+
+        for(int r = in.readInt(); r > 0; --r) {
+            set.add(EnumeratorStringDescriptor.INSTANCE.read(in));
+        }
+
+        return set;
+    }
+}