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Complex event processing and event series analysis component

There is a newer version: 7.1.0

/**************************************************************************************
 * Copyright (C) 2006-2015 EsperTech Inc. All rights reserved.                        *
 * http://www.espertech.com/esper                                                          *
 * http://www.espertech.com                                                           *
 * ---------------------------------------------------------------------------------- *
 * The software in this package is published under the terms of the GPL license       *
 * a copy of which has been included with this distribution in the license.txt file.  *
 **************************************************************************************/
package com.espertech.esper.pattern;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public final class MatchedEventMapMeta
{
    private final static int MIN_MAP_LOOKUP = 3;

    private final String[] tagsPerIndex;
    private final boolean hasArrayProperties;
    private final Map tagsPerIndexMap;

    public MatchedEventMapMeta(String[] tagsPerIndex, boolean hasArrayProperties) {
        this.tagsPerIndex = tagsPerIndex;
        this.hasArrayProperties = hasArrayProperties;
        this.tagsPerIndexMap = getMap(tagsPerIndex);
    }

    public MatchedEventMapMeta(Set allTags, boolean hasArrayProperties) {
        this.tagsPerIndex = allTags.toArray(new String[allTags.size()]);
        this.hasArrayProperties = hasArrayProperties;
        this.tagsPerIndexMap = getMap(tagsPerIndex);
    }

    public String[] getTagsPerIndex() {
        return tagsPerIndex;
    }

    public int getTagFor(String key) {
        if (tagsPerIndexMap != null) {
            Integer result = tagsPerIndexMap.get(key);
            return result == null ? -1 : result;
        }
        for (int i = 0; i < tagsPerIndex.length; i++) {
            if (tagsPerIndex[i].equals(key)) {
                return i;
            }
        }
        return -1;
    }

    private Map getMap(String[] tagsPerIndex) {
        if (tagsPerIndex.length < MIN_MAP_LOOKUP) {
            return null;
        }

        Map map = new HashMap();
        for (int i = 0; i < tagsPerIndex.length; i++) {
            map.put(tagsPerIndex[i], i);
        }
        return map;
    }

    public boolean isHasArrayProperties() {
        return hasArrayProperties;
    }
}