com.liferay.maven.plugins.util.ContextReplace.java Source code

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Here is the source code for com.liferay.maven.plugins.util.ContextReplace.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.maven.plugins.util;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.StringUtils;

/**
 * @author Brian Wing Shun Chan
 */
public class ContextReplace implements Cloneable {

    public ContextReplace() {
        this(null);
    }

    public ContextReplace(Map<String, String> context) {
        if (context != null) {
            _context.putAll(context);

            _updateArrays();
        }
    }

    public void addValue(String key, String value) {
        if ((key != null) && (value != null)) {
            _context.put(key, value);

            _updateArrays();
        }
    }

    @Override
    public Object clone() {
        return new ContextReplace(_context);
    }

    public String replace(String text) {
        if (text == null) {
            return null;
        }

        if (_keys.length == 0) {
            return text;
        }

        return _replace(text, _keys, _values);
    }

    private String _replace(String s, String[] oldSubs, String[] newSubs) {
        if ((s == null) || (oldSubs == null) || (newSubs == null)) {
            return null;
        }

        if (oldSubs.length != newSubs.length) {
            return s;
        }

        for (int i = 0; i < oldSubs.length; i++) {
            s = StringUtils.replace(s, oldSubs[i], newSubs[i]);
        }

        return s;
    }

    private void _updateArrays() {
        List<String> keys = new ArrayList<String>();
        List<String> values = new ArrayList<String>();

        for (Map.Entry<String, String> entry : _context.entrySet()) {
            String entryKey = entry.getKey();
            String entryValue = entry.getValue();

            keys.add("${" + entryKey + "}");
            values.add(entryValue);
        }

        _keys = keys.toArray(new String[keys.size()]);
        _values = values.toArray(new String[values.size()]);
    }

    private Map<String, String> _context = new LinkedHashMap<String, String>();
    private String[] _keys = new String[0];
    private String[] _values = new String[0];

}