EventParam.java

/*
 * Copyright 2015
 * Ubiquitous Knowledge Processing (UKP) Lab
 * Technische Universität Darmstadt
 *
 * 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 de.tudarmstadt.ukp.dkpro.core.io.brat.internal.model;

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

public class EventParam
{
    public static final String FLAG_ANCHOR = "A";
    
    private static final Pattern PATTERN = Pattern.compile(
            "(?<TYPE>[a-zA-Z_][a-zA-Z0-9_\\-.]+)" +
            "(?<SLOTS>(?:[:][a-zA-Z][a-zA-Z0-9]+)*)");
    
    private static final String TYPE = "TYPE";
    private static final String SLOTS = "SLOTS";

    private final String type;
    private final String[] slots;
    
    public EventParam(String aType, String... aSlots)
    {
        super();
        type = aType;
        slots = aSlots;
    }
    
    public String getType()
    {
        return type;
    }

    public String[] getSlots()
    {
        return slots;
    }

    public static EventParam parse(String aValue)
    {
        Matcher m = PATTERN.matcher(aValue);
        
        if (!m.matches()) {
            throw new IllegalArgumentException("Illegal relation parameter format [" + aValue + "]");
        }

        String[] slots = m.group(SLOTS) != null ? m.group(SLOTS).split(":") : new String[] {};
        
        return new EventParam(m.group(TYPE), slots);
    }
}