java/java-impl/src/com/intellij/codeInsight/template/postfix/templates/SwitchStatementPostfixTemplate.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 com.intellij.codeInsight.template.postfix.templates;

import com.intellij.openapi.util.Condition;
import com.intellij.pom.java.LanguageLevel;
import com.intellij.psi.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import static com.intellij.codeInsight.template.postfix.util.JavaPostfixTemplatesUtils.JAVA_PSI_INFO;

public class SwitchStatementPostfixTemplate extends StringBasedPostfixTemplate {
  private static final Condition<PsiElement> SWITCH_TYPE = new Condition<PsiElement>() {
    @Override
    public boolean value(PsiElement expression) {
      if (!(expression instanceof PsiExpression)) return false;

      PsiType type = ((PsiExpression)expression).getType();

      if (type == null) return false;
      if (PsiType.INT.isAssignableFrom(type)) return true;

      if (type instanceof PsiClassType) {
        PsiClass psiClass = ((PsiClassType)type).resolve();
        if (psiClass != null && psiClass.isEnum()) return true;
      }

      if (type.equalsToText(CommonClassNames.JAVA_LANG_STRING)) {
        PsiFile containingFile = expression.getContainingFile();
        if (containingFile instanceof PsiJavaFile) {
          LanguageLevel level = ((PsiJavaFile)containingFile).getLanguageLevel();
          if (level.isAtLeast(LanguageLevel.JDK_1_7)) return true;
        }
      }

      return false;
    }
  };

  public SwitchStatementPostfixTemplate() {
    super("switch", "switch (expr)", JAVA_PSI_INFO, SWITCH_TYPE);
  }

  @Nullable
  @Override
  public String getTemplateString(@NotNull PsiElement element) {
    return "switch ($expr$){\n$END$\n}";
  }
}