plugins/maven/src/main/java/org/jetbrains/idea/maven/dom/converters/MavenModelVersionConverter.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 org.jetbrains.idea.maven.dom.converters;

import com.intellij.util.xml.ConvertContext;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Collection;
import java.util.Collections;
import java.util.List;

public class MavenModelVersionConverter extends MavenConstantListConverter {
  private static final String VERSION = "4.0.0";
  private static final List<String> VALUES = Collections.singletonList(VERSION);

  protected Collection<String> getValues(@NotNull ConvertContext context) {
    return VALUES;
  }

  @Override
  public String getErrorMessage(@Nullable String s, ConvertContext context) {
    return "Unsupported model version. Only version " + VERSION + " is supported.";
  }
}