001 /**
002 *
003 */
004 package org.wdssii.core;
005
006 import java.util.ArrayList;
007 import java.util.Date;
008 import java.util.List;
009
010 /**
011 * @author lakshman
012 *
013 */
014 public class DataTable extends DataType {
015
016 public static class Column {
017 private final String name;
018 private final String unit;
019 private final List<String> values;
020 public Column(String name, String unit, List<String> values) {
021 this.name = name;
022 this.unit = unit;
023 this.values = values;
024 }
025 public Column(String name, String unit) {
026 this.name = name;
027 this.unit = unit;
028 this.values = new ArrayList<String>();
029 }
030 /** copies from the master. The master can change without affecting this object. */
031 public Column(Column master){
032 this.name = master.name;
033 this.unit = master.unit;
034 this.values = new ArrayList<String>(master.values); // String is immutable
035 }
036 public void addValue(String value){
037 values.add(value);
038 }
039 public String getName() {
040 return name;
041 }
042 public String getUnit() {
043 return unit;
044 }
045 public List<String> getValues() {
046 return values;
047 }
048 public int getNumRows(){
049 return values.size();
050 }
051 }
052
053 private final Column[] columns;
054
055 /**
056 * A tabular product.
057 *
058 * @param originLoc An arbitrary location representative of this table. All items in
059 * this table are assumed to be at this location unless there is
060 * a column named Latitude and/or Longitude and/or Height
061 * @param startTime An arbitrary time representative of this table. All items in this
062 * table are assumed to be at this time. To include items at different
063 * times, create different tables.
064 * @param typeName
065 * @param columns Provide the populated columns here or start off using the Column(name,unit)
066 * constructor, then call addRow() multiple times.
067 * If providing populated columns, make sure they're all the same size!
068 */
069 public DataTable(Location originLoc, Date startTime, String typeName, Column[] columns) {
070 super(originLoc, startTime, typeName);
071 this.columns = columns;
072 }
073
074 /**
075 * copies all the attributes, etc. from the master. The master can change
076 * without affecting this object
077 */
078 public DataTable(DataTable master) {
079 super(master);
080 this.columns = new Column[master.columns.length];
081 for (int i=0; i < columns.length; ++i){
082 this.columns[i] = new Column(master.columns[i]);
083 }
084 }
085
086 public Column[] getColumns() {
087 return columns;
088 }
089
090 /** Make sure to provide the column values in the right order! */
091 public void addRow(String[] values){
092 if ( values.length != columns.length ){
093 throw new IllegalArgumentException("The row should have " + columns.length + " columns");
094 }
095 for (int i=0; i < values.length; ++i){
096 columns[i].addValue(values[i]);
097 }
098 }
099
100 public int getNumRows(){
101 return ( columns.length > 0)? columns[0].getNumRows() : 0;
102 }
103 }