/*
 * 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.psi.search.searches;

import com.intellij.openapi.application.ReadAction;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiFunctionalExpression;
import com.intellij.psi.PsiMethod;
import com.intellij.psi.PsiModifier;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.search.SearchScope;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.util.EmptyQuery;
import com.intellij.util.Query;
import org.jetbrains.annotations.NotNull;

public class FunctionalExpressionSearch extends ExtensibleQueryFactory<PsiFunctionalExpression, FunctionalExpressionSearch.SearchParameters> {
  public static final FunctionalExpressionSearch INSTANCE = new FunctionalExpressionSearch();

  public static class SearchParameters {
    private final PsiClass myElementToSearch;
    private final SearchScope myScope;

    public SearchParameters(@NotNull PsiClass aClass, @NotNull SearchScope scope) {
      myElementToSearch = aClass;
      myScope = scope;
    }

    public PsiClass getElementToSearch() {
      return myElementToSearch;
    }

    @NotNull
    public SearchScope getEffectiveSearchScope () {
      return myScope.intersectWith(myElementToSearch.getUseScope());
    }
  }

  public static Query<PsiFunctionalExpression> search(@NotNull final PsiClass aClass, @NotNull SearchScope scope) {
    return INSTANCE.createUniqueResultsQuery(new SearchParameters(aClass, scope));
  }

  public static Query<PsiFunctionalExpression> search(@NotNull final PsiMethod psiMethod) {
    return search(psiMethod, GlobalSearchScope.allScope(PsiUtilCore.getProjectInReadAction(psiMethod)));
  }

  public static Query<PsiFunctionalExpression> search(@NotNull final PsiMethod psiMethod, @NotNull final SearchScope scope) {
    return ReadAction.compute(() -> {
      if (!psiMethod.hasModifierProperty(PsiModifier.STATIC) && !psiMethod.hasModifierProperty(PsiModifier.DEFAULT)) {
        final PsiClass containingClass = psiMethod.getContainingClass();
        if (containingClass != null) {
          return INSTANCE.createUniqueResultsQuery(new SearchParameters(containingClass, scope));
        }
      }

      return EmptyQuery.getEmptyQuery();
    });
  }

  public static Query<PsiFunctionalExpression> search(@NotNull final PsiClass aClass) {
    return search(aClass, GlobalSearchScope.allScope(PsiUtilCore.getProjectInReadAction(aClass)));
  }
}

/*
 * 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.psi.search.searches;

import com.intellij.openapi.application.ReadAction;
import com.intellij.psi.*;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.search.SearchScope;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.util.EmptyQuery;
import com.intellij.util.Query;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;

public class FunctionalExpressionSearch extends ExtensibleQueryFactory<PsiFunctionalExpression, FunctionalExpressionSearch.SearchParameters> {
  private static final FunctionalExpressionSearch INSTANCE = new FunctionalExpressionSearch();

  public static class SearchParameters {
    private final PsiClass myElementToSearch;
    private final SearchScope myScope;

    public SearchParameters(@NotNull PsiClass aClass, @NotNull SearchScope scope) {
      myElementToSearch = aClass;
      myScope = scope;
    }

    public PsiClass getElementToSearch() {
      return myElementToSearch;
    }

    @NotNull
    public SearchScope getEffectiveSearchScope () {
      return myScope.intersectWith(myElementToSearch.getUseScope());
    }
  }

  public static Query<PsiFunctionalExpression> search(@NotNull final PsiClass aClass, @NotNull SearchScope scope) {
    return INSTANCE.createUniqueResultsQuery(new SearchParameters(aClass, scope), ContainerUtil.canonicalStrategy(), SmartPointerManager::createPointer);
  }

  public static Query<PsiFunctionalExpression> search(@NotNull final PsiMethod psiMethod) {
    return search(psiMethod, GlobalSearchScope.allScope(PsiUtilCore.getProjectInReadAction(psiMethod)));
  }

  public static Query<PsiFunctionalExpression> search(@NotNull final PsiMethod psiMethod, @NotNull final SearchScope scope) {
    return ReadAction.compute(() -> {
      if (!psiMethod.hasModifierProperty(PsiModifier.STATIC) && !psiMethod.hasModifierProperty(PsiModifier.DEFAULT)) {
        final PsiClass containingClass = psiMethod.getContainingClass();
        if (containingClass != null) {
          return INSTANCE.createUniqueResultsQuery(new SearchParameters(containingClass, scope));
        }
      }

      return EmptyQuery.getEmptyQuery();
    });
  }

  public static Query<PsiFunctionalExpression> search(@NotNull final PsiClass aClass) {
    return search(aClass, GlobalSearchScope.allScope(PsiUtilCore.getProjectInReadAction(aClass)));
  }
}

remove duplicates using smart pointers to avoid holding AST