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A packaging of the IntelliJ Community Edition python-community library. This is release number 1 of trunk branch 142.

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/*
 * 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.jetbrains.python.psi.search;

import com.intellij.psi.PsiElement;
import com.intellij.util.Processor;
import com.intellij.util.Query;
import com.intellij.util.QueryExecutor;
import com.jetbrains.python.psi.PyAssignmentStatement;
import com.jetbrains.python.psi.PyClass;
import com.jetbrains.python.psi.PyFunction;
import com.jetbrains.python.psi.PyTargetExpression;
import org.jetbrains.annotations.NotNull;

/**
 * @author yole
 */
public class PyDefinitionsSearch implements QueryExecutor {
  public boolean execute(@NotNull final PsiElement queryParameters, @NotNull final Processor consumer) {
    if (queryParameters instanceof PyClass) {
      final Query query = PyClassInheritorsSearch.search((PyClass)queryParameters, true);
      return query.forEach(new Processor() {
        public boolean process(final PyClass pyClass) {
          return consumer.process(pyClass);
        }
      });
    }
    else if (queryParameters instanceof PyFunction) {
      final Query query = PyOverridingMethodsSearch.search((PyFunction) queryParameters, true);
      return query.forEach(new Processor() {
        public boolean process(final PyFunction pyFunction) {
          return consumer.process(pyFunction);
        }
      });
    }
    else if (queryParameters instanceof PyTargetExpression) {  // PY-237
      final PsiElement parent = queryParameters.getParent();
      if (parent instanceof PyAssignmentStatement) {
        return consumer.process(parent);        
      }
    }
    return true;
  }
}