GrLightParameter.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.impl.synthetic;

import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiEllipsisType;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiType;
import com.intellij.psi.impl.light.LightVariableBuilder;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.plugins.groovy.GroovyLanguage;
import org.jetbrains.plugins.groovy.lang.psi.GroovyElementVisitor;
import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.modifiers.GrModifierList;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.params.GrParameter;
import org.jetbrains.plugins.groovy.lang.psi.api.types.GrTypeElement;
import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.TypesUtil;

/**
 * @author ven
 */
public class GrLightParameter extends LightVariableBuilder<GrLightParameter> implements GrParameter {
  public static final GrLightParameter[] EMPTY_ARRAY = new GrLightParameter[0];
  private volatile boolean myOptional;
  private volatile GrModifierList myModifierList;
  private volatile GrExpression myInitializer;
  private final PsiElement myScope;
  private final GrTypeElement myTypeElement;
  private final PsiType myTypeGroovy;

  public GrLightParameter(@NotNull String name, @Nullable PsiType type, @NotNull PsiElement scope) {
    super(scope.getManager(), name, getTypeNotNull(type, scope), GroovyLanguage.INSTANCE);
    myScope = scope;
    myModifierList = new GrLightModifierList(this);
    myTypeGroovy = type;
    myTypeElement = type == null ? null : new GrLightTypeElement(type, scope.getManager());
  }

  public void setModifierList(GrModifierList modifierList) {
    myModifierList = modifierList;
  }

  @NotNull
  private static PsiType getTypeNotNull(PsiType type, PsiElement scope) {
    return type != null ? type : TypesUtil.getJavaLangObject(scope);
  }

  @NotNull
  @Override
  public PsiElement getDeclarationScope() {
    return myScope;
  }

  @Override
  public boolean isVarArgs() {
    return getType() instanceof PsiEllipsisType;
  }

  @Override
  public GrTypeElement getTypeElementGroovy() {
    return myTypeElement;
  }

  @Override
  public GrExpression getInitializerGroovy() {
    return myInitializer;
  }

  @Override
  public PsiElement getContext() {
    return getDeclarationScope();
  }

  @Override
  public PsiFile getContainingFile() {
    return getDeclarationScope().getContainingFile();
  }

  public GrLightParameter setOptional(boolean optional) {
    myOptional = optional;
    return this;
  }

  @Override
  public boolean isOptional() {
    return myOptional;
  }

  @Nullable
  @Override
  public PsiElement getEllipsisDots() {
    return null;
  }

  @Override
  public void setType(@Nullable PsiType type) throws IncorrectOperationException {
    throw new IncorrectOperationException();
  }

  @Override
  @NotNull
  public PsiElement getNameIdentifierGroovy() {
    return null;
  }

  @Override
  public PsiType getTypeGroovy() {
    return myTypeGroovy;
  }

  @Override
  public PsiType getDeclaredType() {
    return myTypeGroovy;
  }

  @Override
  public void accept(GroovyElementVisitor visitor) {
  }

  @Override
  public void acceptChildren(GroovyElementVisitor visitor) {

  }

  @Override
  public boolean isValid() {
    return getDeclarationScope().isValid();
  }

  @NotNull
  @Override
  public GrModifierList getModifierList() {
    return myModifierList;
  }

  @Override
  public void setInitializerGroovy(GrExpression initializer) {
    myInitializer = initializer;
  }

  @Override
  public GrLightParameter setModifiers(String... modifiers) {
    GrLightModifierList modifiersList = new GrLightModifierList(getContext());
    modifiersList.setModifiers(modifiers);
    myModifierList = modifiersList;
    return this;
  }
}