io.cloudslang.lang.compiler.parser.utils.ParserExceptionHandler.java Source code

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Here is the source code for io.cloudslang.lang.compiler.parser.utils.ParserExceptionHandler.java

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/*
 * (c) Copyright 2016 Hewlett-Packard Development Company, L.P.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Apache License v2.0 which accompany this distribution.
 *
 * The Apache License is available at
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 */
package io.cloudslang.lang.compiler.parser.utils;

import org.springframework.stereotype.Component;
import org.yaml.snakeyaml.constructor.ConstructorException;
import org.yaml.snakeyaml.scanner.ScannerException;

/**
 * User: bancl
 * Date: 1/12/2016
 */
@Component
public class ParserExceptionHandler {

    public static final String CANNOT_CREATE_PROPERTY_ERROR = "Cannot create property";
    public static final String KEY_VALUE_PAIR_MISSING_OR_INDENTATION_PROBLEM_MSG = "Probably did not provide (key: value) pair or missing space after colon(:). Also check that everything is indented properly";
    public static final String MAPPING_VALUES_NOT_ALLOWED_HERE_ERROR = "mapping values are not allowed here";
    public static final String SCANNING_A_SIMPLE_KEY_ERROR = "while scanning a simple key";
    public static final String UNABLE_TO_FIND_PROPERTY_ERROR = "Unable to find property";
    public static final String MAP_CONSTRUCTOR_NOT_FOUND_ERROR = "No single argument constructor found for interface java.util.Map";
    public static final String TRUNCATION_BEGINNING = "Unable";
    public static final String TRUNCATION_END = "on class";

    public String getErrorMessage(Throwable e) {
        String errorMessage = e.getMessage();
        if (e instanceof ScannerException && (errorMessage.startsWith(MAPPING_VALUES_NOT_ALLOWED_HERE_ERROR)
                || errorMessage.startsWith(SCANNING_A_SIMPLE_KEY_ERROR))) {
            errorMessage += KEY_VALUE_PAIR_MISSING_OR_INDENTATION_PROBLEM_MSG;
        } else if (e instanceof ConstructorException && errorMessage.startsWith(CANNOT_CREATE_PROPERTY_ERROR)) {
            if (errorMessage.contains(UNABLE_TO_FIND_PROPERTY_ERROR)) {
                //parse for undefined property name
                String truncatedErrorMessage = errorMessage.substring(errorMessage.indexOf(TRUNCATION_BEGINNING),
                        errorMessage.indexOf(TRUNCATION_END));
                String undefinedProperty = truncatedErrorMessage.substring(truncatedErrorMessage.indexOf("\'") + 1,
                        truncatedErrorMessage.lastIndexOf("\'"));
                errorMessage += "Property \'" + undefinedProperty
                        + "\' is not supported by CloudSlang. Check that \'" + undefinedProperty
                        + "\' is indented properly.";
            } else if (errorMessage.contains(MAP_CONSTRUCTOR_NOT_FOUND_ERROR)) {
                errorMessage += KEY_VALUE_PAIR_MISSING_OR_INDENTATION_PROBLEM_MSG;
            }
        }
        return errorMessage;
    }
}