platform/vcs-api/src/com/intellij/openapi/vcs/CheckSamePattern.java

/*
 * Copyright 2000-2009 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.vcs;

public class CheckSamePattern<T> {
  private boolean mySame;
  private T mySameValue;

  public CheckSamePattern() {
    mySameValue = null;
    mySame = true;
  }

  public void iterate(final T t) {
    if (t == null) {
      mySame = false;
      return;
    }
    if (mySameValue == null) {
      mySameValue = t;
      return;
    }
    mySame &= mySameValue.equals(t);
  }

  public boolean isSame() {
    return mySame;
  }

  public T getSameValue() {
    return mySameValue;
  }
}