From aaed92b37f90a7e3071a815a6ba5ac2006ce420c Mon Sep 17 00:00:00 2001
From: Konstantin Bulenkov <kb@jetbrains.com>
Date: Mon, 5 Apr 2010 13:57:09 +0400
Subject: [PATCH] make EmptyValidityState common and move to openapi

---
 .../openapi/compiler/EmptyValidityState.java  | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 java/compiler/openapi/src/com/intellij/openapi/compiler/EmptyValidityState.java

diff --git a/java/compiler/openapi/src/com/intellij/openapi/compiler/EmptyValidityState.java b/java/compiler/openapi/src/com/intellij/openapi/compiler/EmptyValidityState.java
new file mode 100644
index 000000000000..fdcf40543232
--- /dev/null
+++ b/java/compiler/openapi/src/com/intellij/openapi/compiler/EmptyValidityState.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2000-2010 JetBrains s.r.o.
+ *
+ * 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 com.intellij.openapi.compiler;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+/**
+ * Empty validity state for force recompilation
+ *
+ * @author Konstantin Bulenkov
+ */
+public final class EmptyValidityState implements ValidityState {
+  /**
+   * In most cases this method returns false to force recompile
+   *
+   * @param otherState the state to compare with.
+   * @return true if and only if otherState == this
+   */
+  public boolean equalsTo(ValidityState otherState) {
+      return otherState == this;
+  }
+
+  /**
+   * Do nothing here
+   */
+  public void save(DataOutput dataOutput) throws IOException {
+  }
+}