com.consol.citrus.functions.FunctionParameterHelper Maven / Gradle / Ivy

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/*
 * Copyright 2006-2010 the original author or authors.
 *
 * 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.consol.citrus.functions;

import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

/**
 * Helper class parsing a parameter string and converting the tokens to a parameter list.
 * 
 * @author Christoph Deppisch
 */
public final class FunctionParameterHelper {
    
    /**
     * Prevent class instantiation.
     */
    private FunctionParameterHelper() {}
    
    /**
     * Convert a parameter string to a list of parameters.
     * 
     * @param parameterString comma separated parameter string.
     * @return list of parameters.
     */
    public static List getParameterList(String parameterString) {
        List parameterList = new ArrayList<>();

        StringTokenizer tok = new StringTokenizer(parameterString, ",");
        while (tok.hasMoreElements()) {
            String param = tok.nextToken().trim();
            parameterList.add(cutOffSingleQuotes(param));
        }

        List postProcessed = new ArrayList<>();
        for (int i = 0; i < parameterList.size(); i++) {
            int next = i + 1;
            if (parameterList.get(i).startsWith("'") && !parameterList.get(i).endsWith("'")
                    && next < parameterList.size() && parameterList.get(next).endsWith("'")) {
                if (parameterString.contains(parameterList.get(i) + ", " + parameterList.get(next))) {
                    postProcessed.add(cutOffSingleQuotes(parameterList.get(i) + ", " + parameterList.get(next)));
                } else if (parameterString.contains(parameterList.get(i) + "," + parameterList.get(next))) {
                    postProcessed.add(cutOffSingleQuotes(parameterList.get(i) + "," + parameterList.get(next)));
                } else if (parameterString.contains(parameterList.get(i) + " , " + parameterList.get(next))) {
                    postProcessed.add(cutOffSingleQuotes(parameterList.get(i) + " , " + parameterList.get(next)));
                } else {
                    postProcessed.add(cutOffSingleQuotes(parameterList.get(i) + parameterList.get(next)));
                }

                i++;
            } else {
                postProcessed.add(parameterList.get(i));
            }
        }

        return postProcessed;
    }

    private static String cutOffSingleQuotes(String param) {
        if (param.equals("'")) {
            return "";
        }

        if (param.charAt(0) == '\'' && param.charAt(param.length()-1) == '\'') {
            return param.substring(1, param.length()-1);
        }

        return param;
    }
}