/*
 * Copyright 2000-2009 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.psi.impl.source.tree.java;

import com.intellij.lang.ASTNode;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.psi.*;
import com.intellij.psi.impl.PsiImplUtil;
import com.intellij.psi.impl.java.stubs.JavaStubElementTypes;
import com.intellij.psi.impl.java.stubs.PsiTypeParameterListStub;
import com.intellij.psi.impl.source.JavaStubPsiElement;
import com.intellij.psi.scope.PsiScopeProcessor;
import org.jetbrains.annotations.NotNull;

public class PsiTypeParameterListImpl extends JavaStubPsiElement<PsiTypeParameterListStub> implements PsiTypeParameterList {
  private static final Logger LOG = Logger.getInstance(PsiTypeParameterListImpl.class);

  public PsiTypeParameterListImpl(final PsiTypeParameterListStub stub) {
    super(stub, JavaStubElementTypes.TYPE_PARAMETER_LIST);
  }

  public PsiTypeParameterListImpl(final ASTNode node) {
    super(node);
  }

  @Override
  public PsiTypeParameter @NotNull [] getTypeParameters() {
    return getStubOrPsiChildren(JavaStubElementTypes.TYPE_PARAMETER, PsiTypeParameter.ARRAY_FACTORY);
  }

  @Override
  public int getTypeParameterIndex(@NotNull PsiTypeParameter typeParameter) {
    LOG.assertTrue(typeParameter.getParent() == this);
    return PsiImplUtil.getTypeParameterIndex(typeParameter, this);
  }

  @Override
  public boolean processDeclarations(@NotNull PsiScopeProcessor processor, @NotNull ResolveState state, PsiElement lastParent, @NotNull PsiElement place) {
    final PsiTypeParameter[] parameters = getTypeParameters();
    for (final PsiTypeParameter parameter : parameters) {
      if (!processor.execute(parameter, state)) return false;
    }
    return true;
  }

  @Override
  public void accept(@NotNull PsiElementVisitor visitor) {
    if (visitor instanceof JavaElementVisitor) {
      ((JavaElementVisitor)visitor).visitTypeParameterList(this);
    }
    else {
      visitor.visitElement(this);
    }
  }

  @Override
  public String toString() {
    return "PsiTypeParameterList";
  }
}
