SimpleTypeHintProcessor.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.JavaPsiFacade;
import com.intellij.psi.PsiMethod;
import com.intellij.psi.PsiSubstitutor;
import com.intellij.psi.PsiType;
import com.intellij.util.Function;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.containers.ContainerUtil;
import org.codehaus.groovy.runtime.DefaultGroovyMethods;
import org.jetbrains.annotations.NotNull;

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

public class SimpleTypeHintProcessor extends SignatureHintProcessor {
  @Override
  public String getHintName() {
    return "groovy.transform.stc.SimpleType";
  }

  @NotNull
  @Override
  public List<PsiType[]> inferExpectedSignatures(@NotNull final PsiMethod method,
                                                 @NotNull PsiSubstitutor substitutor,
                                                 @NotNull String[] options) {
    return Collections.singletonList(ContainerUtil.map(options, value -> {
      try {
        PsiType type = JavaPsiFacade.getElementFactory(method.getProject()).createTypeFromText(value, method);
        return DefaultGroovyMethods.asBoolean(type) ? type : PsiType.NULL;
      }
      catch (IncorrectOperationException e) {
        return PsiType.NULL;
      }
    }, new PsiType[options.length]));
  }
}