com.google.template.soy.soyparse.ParseErrors.java Source code

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Here is the source code for com.google.template.soy.soyparse.ParseErrors.java

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/*
 * Copyright 2015 Google 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.google.template.soy.soyparse;

import static com.google.template.soy.base.internal.BaseUtils.formatParseExceptionDetails;

import com.google.common.collect.ImmutableSet;
import com.google.template.soy.base.SourceLocation;
import com.google.template.soy.base.SoySyntaxException;
import com.google.template.soy.error.ErrorReporter;
import com.google.template.soy.error.SoyError;

/**
 * Helpers for interpreting parse errors as soy errors.
 */
final class ParseErrors {
    private ParseErrors() {
    }

    static void reportSoyFileParseException(ErrorReporter reporter, String filePath, ParseException e) {
        // currentToken is the 'last successfully consumed token', but the error is usually due to the
        // first unsuccessful token.  use that for the source location
        Token errorToken = e.currentToken;
        if (errorToken.next != null) {
            errorToken = errorToken.next;
        }
        ImmutableSet.Builder<String> expectedTokenImages = ImmutableSet.builder();
        for (int[] expected : e.expectedTokenSequences) {
            // We only display the first token
            expectedTokenImages.add(getSoyFileParserTokenDisplayName(expected[0]));
        }
        reporter.report(Tokens.createSrcLoc(filePath, errorToken), SoyError.of("{0}"),
                formatParseExceptionDetails(errorToken.image, expectedTokenImages.build().asList()));
    }

    /** 
     * Returns a human friendly display name for tokens.  By default we use the generated token 
     * image which is appropriate for literal tokens.
     */
    private static String getSoyFileParserTokenDisplayName(int tokenId) {
        switch (tokenId) {
        case SoyFileParserConstants.ATTRIBUTE_VALUE:
            return "attribute-value";
        case SoyFileParserConstants.DELTEMPLATE_OPEN:
            return "{deltemplate";
        case SoyFileParserConstants.TEMPLATE_OPEN:
            return "{template";
        case SoyFileParserConstants.DOTTED_IDENT:
            return "identifier";
        case SoyFileParserConstants.EOF:
            return "eof";
        case SoyFileParserConstants.UNEXPECTED_TOKEN:
            throw new AssertionError("we should never expect the unexpected token");
        default:
            return SoyFileParserConstants.tokenImage[tokenId];
        }
    }

    static void report(ErrorReporter reporter, String filePath, SoySyntaxException exception) {
        SourceLocation sourceLocation = exception.getSourceLocation();
        if (!sourceLocation.isKnown()) {
            sourceLocation = new SourceLocation(filePath);
        }
        reporter.report(sourceLocation, SoyError.of("{0}"), exception.getOriginalMessage());
    }

    static void report(ErrorReporter reporter, String filePath, TokenMgrError exception) {
        reporter.report(new SourceLocation(filePath), SoyError.of("{0}"), exception.getMessage());
    }
}