defaultkeyedvalues2d.java

java图形利器

            DefaultKeyedValues rowData 
                = (DefaultKeyedValues) this.rows.get(row);
            int col = rowData.getIndex(columnKey);
            return (col >= 0 ? rowData.getValue(col) : null);
        }
        else {
            throw new UnknownKeyException("Unrecognised rowKey: " + rowKey);
        }
    }

    /**
     * Adds a value to the table.  Performs the same function as 
     * #setValue(Number, Comparable, Comparable).
     *
     * @param value  the value (<code>null</code> permitted).
     * @param rowKey  the row key (<code>null</code> not permitted).
     * @param columnKey  the column key (<code>null</code> not permitted).
     * 
     * @see #setValue(Number, Comparable, Comparable)
     * @see #removeValue(Comparable, Comparable)
     */
    public void addValue(Number value, Comparable rowKey, 
                         Comparable columnKey) {
        // defer argument checking
        setValue(value, rowKey, columnKey);
    }

    /**
     * Adds or updates a value.
     *
     * @param value  the value (<code>null</code> permitted).
     * @param rowKey  the row key (<code>null</code> not permitted).
     * @param columnKey  the column key (<code>null</code> not permitted).
     * 
     * @see #addValue(Number, Comparable, Comparable)
     * @see #removeValue(Comparable, Comparable)
     */
    public void setValue(Number value, Comparable rowKey, 
                         Comparable columnKey) {

        DefaultKeyedValues row;
        int rowIndex = getRowIndex(rowKey);
        
        if (rowIndex >= 0) {
            row = (DefaultKeyedValues) this.rows.get(rowIndex);
        }
        else {
            row = new DefaultKeyedValues();
            if (this.sortRowKeys) {
                rowIndex = -rowIndex - 1;
                this.rowKeys.add(rowIndex, rowKey);
                this.rows.add(rowIndex, row);
            }
            else {
                this.rowKeys.add(rowKey);
                this.rows.add(row);
            }
        }
        row.setValue(columnKey, value);
        
        int columnIndex = this.columnKeys.indexOf(columnKey);
        if (columnIndex < 0) {
            this.columnKeys.add(columnKey);
        }
    }

    /**
     * Removes a value from the table by setting it to <code>null</code>.  If
     * all the values in the specified row and/or column are now 
     * <code>null</code>, the row and/or column is removed from the table.
     *
     * @param rowKey  the row key (<code>null</code> not permitted).
     * @param columnKey  the column key (<code>null</code> not permitted).
     * 
     * @see #addValue(Number, Comparable, Comparable)
     */
    public void removeValue(Comparable rowKey, Comparable columnKey) {
        setValue(null, rowKey, columnKey);
        
        // 1. check whether the row is now empty.
        boolean allNull = true;
        int rowIndex = getRowIndex(rowKey);
        DefaultKeyedValues row = (DefaultKeyedValues) this.rows.get(rowIndex);

        for (int item = 0, itemCount = row.getItemCount(); item < itemCount; 
             item++) {
            if (row.getValue(item) != null) {
                allNull = false;
                break;
            }
        }
        
        if (allNull) {
            this.rowKeys.remove(rowIndex);
            this.rows.remove(rowIndex);
        }
        
        // 2. check whether the column is now empty.
        allNull = true;
        //int columnIndex = getColumnIndex(columnKey);
        
        for (int item = 0, itemCount = this.rows.size(); item < itemCount; 
             item++) {
            row = (DefaultKeyedValues) this.rows.get(item);
            int columnIndex = row.getIndex(columnKey);
            if (columnIndex >= 0 && row.getValue(columnIndex) != null) {
                allNull = false;
                break;
            }
        }
        
        if (allNull) {
            for (int item = 0, itemCount = this.rows.size(); item < itemCount; 
                 item++) {
                row = (DefaultKeyedValues) this.rows.get(item);
                int columnIndex = row.getIndex(columnKey);
                if (columnIndex >= 0) {
                    row.removeValue(columnIndex);
                }
            }
            this.columnKeys.remove(columnKey);
        }
    }

    /**
     * Removes a row.
     *
     * @param rowIndex  the row index.
     * 
     * @see #removeRow(Comparable)
     * @see #removeColumn(int)
     */
    public void removeRow(int rowIndex) {
        this.rowKeys.remove(rowIndex);
        this.rows.remove(rowIndex);
    }

    /**
     * Removes a row.
     *
     * @param rowKey  the row key (<code>null</code> not permitted).
     * 
     * @see #removeRow(int)
     * @see #removeColumn(Comparable)
     */
    public void removeRow(Comparable rowKey) {
        removeRow(getRowIndex(rowKey));
    }

    /**
     * Removes a column.
     *
     * @param columnIndex  the column index.
     * 
     * @see #removeColumn(Comparable)
     * @see #removeRow(int)
     */
    public void removeColumn(int columnIndex) {
        Comparable columnKey = getColumnKey(columnIndex);
        removeColumn(columnKey);
    }

    /**
     * Removes a column.
     *
     * @param columnKey  the column key (<code>null</code> not permitted).
     * 
     * @see #removeColumn(int)
     * @see #removeRow(Comparable)
     */
    public void removeColumn(Comparable columnKey) {
        Iterator iterator = this.rows.iterator();
        while (iterator.hasNext()) {
            DefaultKeyedValues rowData = (DefaultKeyedValues) iterator.next();
            rowData.removeValue(columnKey);
        }
        this.columnKeys.remove(columnKey);
    }

    /**
     * Clears all the data and associated keys.
     */
    public void clear() {
        this.rowKeys.clear();
        this.columnKeys.clear();
        this.rows.clear();
    }
    
    /**
     * Tests if this object is equal to another.
     *
     * @param o  the other object (<code>null</code> permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object o) {

        if (o == null) {
            return false;
        }
        if (o == this) {
            return true;
        }

        if (!(o instanceof KeyedValues2D)) {
            return false;
        }
        KeyedValues2D kv2D = (KeyedValues2D) o;
        if (!getRowKeys().equals(kv2D.getRowKeys())) {
            return false;
        }
        if (!getColumnKeys().equals(kv2D.getColumnKeys())) {
            return false;
        }
        int rowCount = getRowCount();
        if (rowCount != kv2D.getRowCount()) {
            return false;
        }

        int colCount = getColumnCount();
        if (colCount != kv2D.getColumnCount()) {
            return false;
        }

        for (int r = 0; r < rowCount; r++) {
            for (int c = 0; c < colCount; c++) {
                Number v1 = getValue(r, c);
                Number v2 = kv2D.getValue(r, c);
                if (v1 == null) {
                    if (v2 != null) {
                        return false;
                    }
                }
                else {
                    if (!v1.equals(v2)) {
                        return false;
                    }
                }
            }
        }
        return true;
    }

    /**
     * Returns a hash code.
     * 
     * @return A hash code.
     */
    public int hashCode() {
        int result;
        result = this.rowKeys.hashCode();
        result = 29 * result + this.columnKeys.hashCode();
        result = 29 * result + this.rows.hashCode();
        return result;
    }

    /**
     * Returns a clone.
     * 
     * @return A clone.
     * 
     * @throws CloneNotSupportedException  this class will not throw this 
     *         exception, but subclasses (if any) might.
     */
    public Object clone() throws CloneNotSupportedException {
        DefaultKeyedValues2D clone = (DefaultKeyedValues2D) super.clone();
        // for the keys, a shallow copy should be fine because keys
        // should be immutable...
        clone.columnKeys = new java.util.ArrayList(this.columnKeys);
        clone.rowKeys = new java.util.ArrayList(this.rowKeys);
        
        // but the row data requires a deep copy
        clone.rows = (List) ObjectUtilities.deepClone(this.rows);
        return clone;
    }

}