com.facebook.buck.core.cell.UnknownCellException.java Source code

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Here is the source code for com.facebook.buck.core.cell.UnknownCellException.java

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/*
 * Copyright 2018-present Facebook, Inc.
 *
 * 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.facebook.buck.core.cell;

import com.facebook.buck.core.exceptions.HumanReadableException;
import com.facebook.buck.util.string.MoreStrings;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.util.List;
import java.util.Optional;

/** Exception that represents a build target attempting to use a cell which doesn't exist. */
public class UnknownCellException extends HumanReadableException {

    private static final String generateErrorMessage(Optional<String> cellName,
            ImmutableSet<String> validCellNames) {
        if (!cellName.isPresent()) {
            return "Cannot determine path of the root cell";
        } else {
            List<String> suggestions = generateSuggestions(cellName, validCellNames);
            return String.format("Unknown cell: %s. Did you mean one of %s instead?", cellName.get(),
                    suggestions.isEmpty() ? validCellNames : suggestions);
        }
    }

    private static final ImmutableList<String> generateSuggestions(Optional<String> cellName,
            ImmutableSet<String> validCellNames) {
        if (!cellName.isPresent()) {
            return ImmutableList.of();
        }

        List<String> suggestions = MoreStrings.getSpellingSuggestions(cellName.get(), validCellNames, 2);

        if (!suggestions.isEmpty()) {
            return ImmutableList.copyOf(suggestions);
        }

        return validCellNames.stream().sorted().collect(ImmutableList.toImmutableList());
    }

    public UnknownCellException(Optional<String> cellName, ImmutableSet<String> validCellNames) {
        super(generateErrorMessage(cellName, validCellNames));
    }
}