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/* 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 org.activiti.bpmn.converter.util;

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

public class CommaSplitter {

    // split the given spring using commas if they are not inside an expression
    public static List splitCommas(String st) {
        List result = new ArrayList();
        int offset = 0;

        boolean inExpression = false;
        for (int i = 0; i < st.length(); i++) {
            if (!inExpression && st.charAt(i) == ',') {
                if ((i - offset) > 1) {
                    result.add(st.substring(offset,
                                            i));
                }
                offset = i + 1;
            } else if ((st.charAt(i) == '$' || st.charAt(i) == '#') && st.charAt(i + 1) == '{') {
                inExpression = true;
            } else if (st.charAt(i) == '}') {
                inExpression = false;
            }
        }

        if ((st.length() - offset) > 1) {
            result.add(st.substring(offset));
        }
        return result;
    }
}