Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

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

public class Main {
    public static String implementProjection(List<String> columns, String[] projection,
            Map<String, String> translation) {
        List<String> localColumns = new ArrayList<String>();
        if (projection == null) {
            localColumns.addAll(columns);
        } else {
            for (int i = 0; i < projection.length; i++) {
                if (columns.contains(projection[i])) {
                    localColumns.add(projection[i]);
                }
            }
        }
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < localColumns.size(); i++) {
            if (i > 0) {
                sb.append(", ");
            }
            if (translation.containsKey(localColumns.get(i))) {
                sb.append(translation.get(localColumns.get(i)));
            } else {
                sb.append(localColumns.get(i));
            }
        }
        return sb.toString();
    }
}