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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/* $Id$ */
package org.apache.fop.fo.flow.table;
import org.apache.fop.fo.ValidationException;
/**
* A class that creates groups of rows belonging to a same set of spans. The first row of
* such a group has only cells which don't span over several rows, or whose spanning
* starts on this row. Similarly, the last row has only non-row spanning cells or spans
* which end on this row.
*/
abstract class RowGroupBuilder {
protected Table table;
/**
* Creates and initialises a new builder for the given table.
*
* @param t a table
*/
protected RowGroupBuilder(Table t) {
table = t;
}
/**
* Adds a table-cell to the current row-group, creating {@link GridUnit}s accordingly.
*
* @param cell the cell to add
*/
abstract void addTableCell(TableCell cell);
/**
* Receives notification of the start of an fo:table-row element.
*
* @param tableRow the row being started
*/
abstract void startTableRow(TableRow tableRow);
/**
* Receives notification of the end of the current row. If the current row finishes
* the row group, the {@link TablePart#addRowGroup(List)} method of the parent table
* part will be called.
*/
abstract void endTableRow();
/**
* Receives notification of the end of the current row, when the source contains no
* fo:table-row element. If the current row finishes the row group, the
* {@link TablePart#addRowGroup(List)} method of the given table part will be called.
*
* <p>If the source does contain explicit fo:table-row elements, then the
* {@link #endTableRow()} method will be called instead.</p>
*
* @param part the part containing the current row
*/
abstract void endRow(TablePart part);
/**
* Receives notification of the start of a table-header/footer/body.
*
* @param part the part being started
*/
abstract void startTablePart(TablePart part);
/**
* Receives notification of the end of a table-header/footer/body. The current
* row-group is checked for emptiness. This row group builder is reset for handling
* further possible table parts.
*
* @throws ValidationException if a row-spanning cell overflows the given table part
*/
abstract void endTablePart() throws ValidationException;
/**
* Receives notification of the end of the table.
*
* @throws ValidationException if a row-spanning cell overflows one of the table's parts
*/
abstract void endTable() throws ValidationException;
}
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