在JAVA实现DataTable对象（二）——DatColumn和DataRow对象实现

public class DataColumn {
    private boolean readOnly; // 只读

    private DataTable table; //dataTable的引用

    private String columnName; //列名

    private String captionName; //显示名称

    private int columnIndex;//列索引

    private int dataType;//列数据类型

    private String dataTypeName;//数据类型名称

    public DataColumn() {
        this("default1");
    }

    public DataColumn(int dataType) {
        this("default1", dataType);
    }

    public DataColumn(String columnName) {
        this(columnName, 0);
    }

    public DataColumn(String columnName, int dataType) {
        this.setDataType(dataType);
        this.columnName = columnName;
    }

    public String getColumnName() {
        return this.columnName;
    }

    public void setColumnName(String columnName) {
        this.columnName = columnName;
    }

    public String getCaptionName() {
        return captionName;
    }

    public void setCaptionName(String captionName) {
        this.captionName = captionName;
    }

    public boolean isReadOnly() {
        return this.readOnly;
    }

    public void setReadOnly(boolean readOnly) {
        this.readOnly = readOnly;
    }

    public DataTable getTable() {
        return this.table;
    }

    public void setTable(DataTable table) {
        this.table = table;
    }

    /**
     * @param dataType
     */
    public void setDataType(int dataType) {
        this.dataType = dataType;
    }

    /**
     * @return  the dataType
    */
    public int getDataType() {
        return dataType;
    }

    /**
     * @param columnIndex
     */
    public void setColumnIndex(int columnIndex) {
        this.columnIndex = columnIndex;
    }

    /**
     * @return  the columnIndex
    */
    public int getColumnIndex() {
        return columnIndex;
    }

    public String getDataTypeName() {
        return DataTypes.getDataTypeName(dataType);
    }

    /**
     * 功能描述：  将输入数据转为当前列的数据类型返回
     * @param

     */
    public Object convertTo(Object value) {
        return value;
    }

    @Override
    public String toString(){
        return this.columnName;
    }
}

 

 

import java.util.LinkedHashMap;
import java.util.Map;

public class DataRow {
    //定义该行记录在table所处的行数
    private int rowIndex = -1;
    private DataColumnCollection columns;
    //table的一个引用
    private DataTable table;
    //用于存储数据的Map对象，这里保存的对象不包括顺序信息，数据获取的索引通过行信息标识
    private Map<String, Object> itemMap = new LinkedHashMap<String, Object>();

    public DataRow() {

    }

    public DataRow(DataTable table) {
        this.table = table;
    }

    /**
     * 功能描述：  获取当前行的行索引
     * @param
     * @return: int
     */
    public int getRowIndex() {
        return rowIndex;
    }

    /**
     * 功能描述：  获取当前行所属数据表对象
     * @param
     * @return: DataTable
     */
    public DataTable getTable() {
        return this.table;
    }

    /**
     * @param columns
     */
    public void setColumns(DataColumnCollection columns) {
        this.columns = columns;
    }

    /**
     * @return  the columns
    */
    public DataColumnCollection getColumns() {
        return columns;
    }

    public void setValue(int index,
            Object value) {
        setValue(this.columns.get(index), value);
    }

    public void setValue(String columnName,
            Object value) {
        setValue(this.columns.get(columnName), value);
    }

    public void setValue(DataColumn column,
            Object value) {
        if (column != null) {
            String lowerColumnName = column.getColumnName().toLowerCase();
            if (getItemMap().containsKey(lowerColumnName))
                getItemMap().remove(lowerColumnName);
            getItemMap().put(lowerColumnName, column.convertTo(value));
        }
    }

    public Object getValue(int index) {
        String colName = this.columns.get(index).getColumnName().toLowerCase();
        return this.getItemMap().get(colName);
    }

    public Object getValue(String columnName) {
        return this.getItemMap().get(columnName.toLowerCase());
    }

    /**
     * @return  the itemMap
    */
    public Map<String, Object> getItemMap() {
        return itemMap;
    }

    /**
     * @param rowIndex
     */
    public void setRowIndex(int rowIndex) {
        this.rowIndex = rowIndex;
    }

    public void copyFrom(DataRow row) {
        this.itemMap.clear();//首先请客当前记录
        for (Object c : this.columns) {
            this.itemMap.put(c.toString().toLowerCase(), row.getValue(c.toString()));
        }
    }
}