plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/psi/impl/synthetic/GrLightClassReferenceElement.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.openapi.util.TextRange;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiType;
import com.intellij.psi.impl.light.LightElement;
import com.intellij.util.ArrayUtil;
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.GroovyResolveResult;
import org.jetbrains.plugins.groovy.lang.psi.api.types.GrCodeReferenceElement;
import org.jetbrains.plugins.groovy.lang.psi.api.types.GrTypeArgumentList;
import org.jetbrains.plugins.groovy.lang.psi.impl.GroovyPsiManager;
import org.jetbrains.plugins.groovy.lang.psi.impl.GroovyResolveResultImpl;

/**
 * @author Maxim.Medvedev
 */
public class GrLightClassReferenceElement extends LightElement implements GrCodeReferenceElement {
  @NotNull
  private final String myClassName;
  private final String myText;
  private final PsiElement myContext;

  public GrLightClassReferenceElement(@NotNull String className, @NotNull String text, PsiElement context) {
    super(context.getManager(), GroovyLanguage.INSTANCE);
    myClassName = className;
    myText = text;
    myContext = context;
  }

  public GrLightClassReferenceElement(PsiClass aClass, PsiElement context) {
    this(aClass.getQualifiedName() != null ? aClass.getQualifiedName() : aClass.getName(), aClass.getName(), context);
  }

  @Override
  public String getReferenceName() {
    return myClassName;
  }


  @Override
  public PsiElement resolve() {
    return GroovyPsiManager.getInstance(getProject()).findClassWithCache(myClassName, myContext.getResolveScope());
  }

  @Override
  public GroovyResolveResult advancedResolve() {
    return new GroovyResolveResultImpl(resolve(), true);
  }

  @NotNull
  @Override
  public GroovyResolveResult[] multiResolve(boolean incompleteCode) {
    final GroovyResolveResult resolveResult = advancedResolve();
    if (resolveResult.getElement() == null) {
      return new GroovyResolveResult[]{resolveResult};
    }
    else {
      return GroovyResolveResult.EMPTY_ARRAY;
    }
  }

  @NotNull
  @Override
  public PsiType[] getTypeArguments() {
    return PsiType.EMPTY_ARRAY;
  }

  @Override
  public GrTypeArgumentList getTypeArgumentList() {
    return null;
  }

  @NotNull
  @Override
  public String getClassNameText() {
    return myClassName;
  }

  @Override
  public PsiElement handleElementRenameSimple(String newElementName) throws IncorrectOperationException {
    throw new UnsupportedOperationException();
  }

  @Override
  public GrCodeReferenceElement getQualifier() {
    return null;
  }

  @Override
  public void setQualifier(@Nullable GrCodeReferenceElement grCodeReferenceElement) {
    throw new UnsupportedOperationException();
  }

  @Override
  public PsiElement getReferenceNameElement() {
    return null;
  }

  @Override
  public boolean isQualified() {
    return false;
  }

  @Override
  public void accept(GroovyElementVisitor visitor) {
    //todo ???
  }

  @Override
  public void acceptChildren(GroovyElementVisitor visitor) {
  }

  @Override
  public String toString() {
    return "light reference element";
  }

  @Override
  public PsiElement getElement() {
    return this;
  }

  @Override
  public TextRange getRangeInElement() {
    return new TextRange(0, getTextLength());
  }

  @NotNull
  @Override
  public String getCanonicalText() {
    final PsiElement resolved = resolve();
    if (resolved instanceof PsiClass) return ((PsiClass)resolved).getQualifiedName();
    return myClassName;
  }

  @Override
  public PsiElement handleElementRename(String newElementName) throws IncorrectOperationException {
    throw new UnsupportedOperationException();
  }

  @Override
  public PsiElement bindToElement(@NotNull PsiElement element) throws IncorrectOperationException {
    throw new UnsupportedOperationException();
  }

  @Override
  public boolean isReferenceTo(PsiElement element) {
    return myManager.areElementsEquivalent(element, resolve());
  }

  @NotNull
  @Override
  public Object[] getVariants() {
    return ArrayUtil.EMPTY_OBJECT_ARRAY;
  }

  @Override
  public boolean isSoft() {
    return false;
  }

  @Override
  public String getText() {
    return myText;
  }


}