platform/core-api/src/com/intellij/util/ExecutorsQuery.java

/*
 * 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.util;

import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.progress.ProcessCanceledException;
import com.intellij.openapi.project.IndexNotReadyException;
import org.jetbrains.annotations.NotNull;

import java.util.List;

/**
 * @author max
 */
public final class ExecutorsQuery<Result, Parameter> extends AbstractQuery<Result> {
  private static final Logger LOG = Logger.getInstance("#com.intellij.util.ExecutorsQuery"); 

  private final List<QueryExecutor<Result, Parameter>> myExecutors;
  private final Parameter myParameters;

  public ExecutorsQuery(@NotNull final Parameter params, @NotNull List<QueryExecutor<Result, Parameter>> executors) {
    myParameters = params;
    myExecutors = executors;
  }

  @Override
  protected boolean processResults(@NotNull final Processor<Result> consumer) {
    for (QueryExecutor<Result, Parameter> executor : myExecutors) {
      try {
        if (!executor.execute(myParameters, consumer)) {
          return false;
        }
      }
      catch (ProcessCanceledException e) {
        throw e;
      }
      catch (IndexNotReadyException e) {
        throw e;
      }
      catch (Exception e) {
        LOG.error(e);
      }
    }

    return true;
  }

}