GrEnumConverter.java

/*
 * Copyright 2000-2014 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.plugins.groovy.lang.psi.typeEnhancers;

import com.intellij.psi.CommonClassNames;
import com.intellij.psi.PsiType;
import com.intellij.psi.util.InheritanceUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.plugins.groovy.config.GroovyConfigUtils;
import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElement;
import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.ConversionResult;
import org.jetbrains.plugins.groovy.lang.psi.util.GroovyCommonClassNames;

import static org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.TypesUtil.isEnum;

public class GrEnumConverter extends GrTypeConverter {

  @Override
  public boolean isApplicableTo(@NotNull ApplicableTo position) {
    return position == ApplicableTo.ASSIGNMENT || position == ApplicableTo.RETURN_VALUE;
  }

  @Nullable
  @Override
  public ConversionResult isConvertibleEx(@NotNull PsiType targetType,
                                          @NotNull PsiType actualType,
                                          @NotNull GroovyPsiElement context,
                                          @NotNull ApplicableTo currentPosition) {
    if (!isEnum(targetType)) return null;
    if (InheritanceUtil.isInheritor(actualType, GroovyCommonClassNames.GROOVY_LANG_GSTRING) ||
        InheritanceUtil.isInheritor(actualType, CommonClassNames.JAVA_LANG_STRING)) {
      return GroovyConfigUtils.getInstance().isVersionAtLeast(context, GroovyConfigUtils.GROOVY1_8)
             ? ConversionResult.OK
             : ConversionResult.ERROR;
    }
    return null;
  }
}