/*
 * Copyright 2009 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.gwt.gen2.table.client.property;

/**
 * A {@link ColumnProperty} that provides information about the headers above a
 * column. The row indexes start from the bottom of the header, such that all
 * headers at the 0th index refer to the row directly above the data table.
 */
public class HeaderProperty extends HeaderPropertyBase {
    /**
     * Property type.
     */
    public static final Type<HeaderProperty> TYPE = new Type<HeaderProperty>() {
        private HeaderProperty instance;

        @Override
        public HeaderProperty getDefault() {
            if ( instance == null ) {
                instance = new HeaderProperty();
            }
            return instance;
        }
    };

    /**
     * Get the header at the given row index.
     *
     * @param row the row index from the bottom.
     *
     * @return the header for the given row
     */
    @Override
    public Object getHeader( int row ) {
        return super.getHeader( row );
    }

    /**
     * Get the header at the given row and column index. Override this method if
     * your header includes dynamic content that depends on the column index.
     *
     * @param row    the row index from the bottom
     * @param column the column index at runtime
     *
     * @return the header for the given row
     */
    @Override
    public Object getHeader( int row, int column ) {
        return getHeader( row );
    }

    /**
     * @return get the number of headers above the column
     */
    @Override
    public int getHeaderCount() {
        return super.getHeaderCount();
    }

    /**
     * Remove the header above this column for the specified row.
     *
     * @param row the row index from the bottom
     */
    @Override
    public void removeHeader( int row ) {
        super.removeHeader( row );
    }

    /**
     * Set the header above this column. The row index starts with the bottom row,
     * which is reverse of a normal table. The headerCount will automatically be
     * increased to accommodate the row.
     *
     * @param row    the row index from the bottom
     * @param header the header
     */
    @Override
    public void setHeader( int row, Object header ) {
        super.setHeader( row, header );
    }

    /**
     * Set the number of headers above the column.
     *
     * @param headerCount the number of headers
     */
    @Override
    public void setHeaderCount( int headerCount ) {
        super.setHeaderCount( headerCount );
    }
}