AttributePreprocessorImpl.java

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package com.sun.enterprise.admin.servermgmt.stringsubs.impl;

import java.util.Map;

import com.sun.enterprise.admin.servermgmt.stringsubs.AttributePreprocessor;

/**
 * Implementation of {@link AttributePreprocessor}
 */
public class AttributePreprocessorImpl implements AttributePreprocessor
{
    private Map<String, String> _lookUpMap = null;
    private static final String DELIMITER = "$";

    AttributePreprocessorImpl() {}

    public AttributePreprocessorImpl(Map<String, String> lookUpMap) {
        _lookUpMap = lookUpMap;
    }

    @Override
    public String substituteBefore(String beforeValue) {
        return beforeValue;
    }

    @Override
    public String substituteAfter(String afterValue) {
        return substitute(afterValue, DELIMITER, DELIMITER);
    }

    @Override
    public String substitutePath(String path) {
        return substitute(path, DELIMITER, DELIMITER);
    }

    private String substitute(final String var, final String startDelim, final String endDelim)
    {
        if (var == null || startDelim == null || endDelim == null) {
            return var;
        }
        int firstIndex = var.indexOf(startDelim);
        int secondIndex = var.indexOf(endDelim, firstIndex + startDelim.length());
        if (firstIndex == -1 || secondIndex == -1) {
            return var;
        }
        StringBuilder stringStart = new StringBuilder(var.substring(0, firstIndex));
        String sub = _lookUpMap.get(var.substring(firstIndex + startDelim.length(), secondIndex));
        String stringEnd = var.substring(secondIndex + endDelim.length(), var.length());
        if (sub != null) {
          stringStart.append(sub);
        }
        stringStart.append((stringEnd.indexOf(startDelim) == -1) ? stringEnd : substitute(stringEnd, startDelim, endDelim));
        return stringStart.toString();
    }
}