oims.dataBase.ColumnSelector.java Source code

Introduction

Here is the source code for oims.dataBase.ColumnSelector.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package oims.dataBase;

import java.util.Map;
import java.util.Iterator;
import java.util.Set;
import com.google.common.collect.Maps;

/**
 *
 * @author freda
 */
public class ColumnSelector {
    final private String tableName_;
    private Map<String, String> itsColumns_;
    private Iterator<Map.Entry<String, String>> itsItor_;
    private Set<Map.Entry<String, String>> itsEntrySet_;

    public void addColumn(String columnName, String value) {
        if (itsColumns_ == null) {
            itsColumns_ = Maps.newHashMap();
        }
        itsColumns_.put(columnName, value);
    }

    public void removeColumn(String columnName) {
        itsColumns_.remove(columnName);
    }

    public void empty() {
        itsColumns_.entrySet();
        itsEntrySet_ = null;
        itsItor_ = null;
    }

    public Boolean isEmpty() {
        return itsColumns_.isEmpty();
    }

    public String TableName() {
        return tableName_;
    }

    public void initItor() {
        itsEntrySet_ = itsColumns_.entrySet();
        itsItor_ = itsEntrySet_.iterator();
    }

    public Map.Entry<String, String> getNext() {
        if (this.itsItor_ == null || !this.itsItor_.hasNext() || this.itsEntrySet_ == null) {
            return null;
        }

        return itsItor_.next();
    }

    private ColumnSelector() {
        tableName_ = "";
    };
}