CreateSetterFromUsageFix.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.annotator.intentions;

import com.intellij.codeInsight.intention.LowPriorityAction;
import com.intellij.psi.PsiType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression;
import org.jetbrains.plugins.groovy.lang.psi.dataFlow.types.TypeInferenceHelper;
import org.jetbrains.plugins.groovy.lang.psi.expectedTypes.SubtypeConstraint;
import org.jetbrains.plugins.groovy.lang.psi.expectedTypes.TypeConstraint;
import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.TypesUtil;
import org.jetbrains.plugins.groovy.lang.psi.util.GroovyPropertyUtils;
import org.jetbrains.plugins.groovy.lang.psi.util.PsiUtil;

/**
 * @author Max Medvedev
 */
public class CreateSetterFromUsageFix extends CreateMethodFromUsageFix implements LowPriorityAction {
  public CreateSetterFromUsageFix(@NotNull GrReferenceExpression refExpression) {
    super(refExpression);
  }

  @NotNull
  @Override
  protected TypeConstraint[] getReturnTypeConstraints() {
    return new TypeConstraint[]{SubtypeConstraint.create(PsiType.VOID)};
  }

  @Override
  protected PsiType[] getArgumentTypes() {
    final GrReferenceExpression ref = getRefExpr();
    assert PsiUtil.isLValue(ref);
    PsiType initializer = TypeInferenceHelper.getInitializerTypeFor(ref);
    if (initializer == null || initializer == PsiType.NULL) {
      initializer = TypesUtil.getJavaLangObject(ref);
    }
    return new PsiType[]{initializer};
  }

  @NotNull
  @Override
  protected String getMethodName() {
    return GroovyPropertyUtils.getSetterName(getRefExpr().getReferenceName());
  }
}