com.facebook.buck.intellij.ideabuck.ui.utils.ErrorExtractor.java Source code

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Here is the source code for com.facebook.buck.intellij.ideabuck.ui.utils.ErrorExtractor.java

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/*
 * Copyright 2015-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.intellij.ideabuck.ui.utils;

import com.google.common.collect.ImmutableList;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ErrorExtractor {

    private static final Pattern MAIN_PATTERN = Pattern.compile("(.*):(\\-?\\d+):\\s(error|warning):",
            Pattern.MULTILINE);
    private static final Pattern EOM_PATTERN = Pattern.compile("Errors: \\d+\\.", Pattern.MULTILINE);
    private ImmutableList<CompilerErrorItem> mErrors;

    public ErrorExtractor(String errorMessage) {
        Matcher matcher = MAIN_PATTERN.matcher(errorMessage);
        ImmutableList.Builder<CompilerErrorItem> builder = new ImmutableList.Builder<CompilerErrorItem>();

        CompilerErrorItem currentError = null;
        int lastMatchEnd = -1;

        while (matcher.find()) {
            if (currentError != null) {
                // add the last one
                String currentErrorMessage = errorMessage.substring(lastMatchEnd, matcher.start()).trim();
                currentError.setError(currentErrorMessage);
                currentError.setColumn(findColumn(currentErrorMessage));
                builder.add(currentError);
            }
            currentError = new CompilerErrorItem(matcher.group(1), Integer.parseInt(matcher.group(2)),
                    matcher.group(3).equalsIgnoreCase("error") ? CompilerErrorItem.Type.ERROR
                            : CompilerErrorItem.Type.WARNING);
            lastMatchEnd = matcher.end();
        }
        if (currentError != null) {
            Matcher matchEnd = EOM_PATTERN.matcher(errorMessage);
            String currentErrorMessage = "";

            if (matchEnd.find(lastMatchEnd)) {
                // Add the rest
                currentErrorMessage = errorMessage.substring(lastMatchEnd, matchEnd.start()).trim();
            } else {
                // Not found the end, add everything as an error message.
                currentErrorMessage = errorMessage.substring(lastMatchEnd).trim();
            }
            currentError.setError(currentErrorMessage);
            currentError.setColumn(findColumn(currentErrorMessage));
            builder.add(currentError);
        }
        mErrors = builder.build();
    }

    public ImmutableList<CompilerErrorItem> getErrors() {
        return mErrors;
    }

    private int findColumn(String currentErrorMessage) {
        String[] lines = currentErrorMessage.split("\n");
        for (String currentLine : lines) {
            if (currentLine.endsWith("^")) {
                return currentLine.length();
            }
        }
        return -1;
    }

}