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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.layoutmgr.table;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FONode.FONodeIterator;
import org.apache.fop.fo.flow.table.EffRow;
import org.apache.fop.fo.flow.table.Table;
import org.apache.fop.fo.flow.table.TableBody;
/**
* Iterator that lets the table layout manager step over all the rows of a part of the
* table (table-header, table-footer or table-body).
* <p>Note: This class is not thread-safe.</p>
*/
public class TableRowIterator {
/** Selects the table-body elements for iteration. */
public static final int BODY = 0;
/** Selects the table-header elements for iteration. */
public static final int HEADER = 1;
/** Selects the table-footer elements for iteration. */
public static final int FOOTER = 2;
/** The table on which this instance operates. */
protected Table table;
/** Part of the table over which to iterate. One of BODY, HEADER or FOOTER. */
private int tablePart;
private Iterator rowGroupsIter;
private int rowIndex = 0;
/**
* Creates a new TableRowIterator.
* @param table the table to iterate over
* @param tablePart indicates what part of the table to iterate over (HEADER, FOOTER, BODY)
*/
public TableRowIterator(Table table, int tablePart) {
this.table = table;
this.tablePart = tablePart;
switch(tablePart) {
case HEADER:
rowGroupsIter = table.getTableHeader().getRowGroups().iterator();
break;
case FOOTER:
rowGroupsIter = table.getTableFooter().getRowGroups().iterator();
break;
default:
List rowGroupsList = new LinkedList();
// TODO this is ugly
for (FONodeIterator iter = table.getChildNodes(); iter.hasNext();) {
FONode node = iter.nextNode();
if (node instanceof TableBody) {
rowGroupsList.addAll(((TableBody) node).getRowGroups());
}
}
rowGroupsIter = rowGroupsList.iterator();
}
}
/**
* Returns the next row group if any. A row group in this context is the minimum number of
* consecutive rows which contains all spanned grid units of its cells.
* @return the next row group, or null
*/
EffRow[] getNextRowGroup() {
if (!rowGroupsIter.hasNext()) {
return null;
}
List rowGroup = (List) rowGroupsIter.next();
EffRow[] effRowGroup = new EffRow[rowGroup.size()];
int i = 0;
for (Iterator rowIter = rowGroup.iterator(); rowIter.hasNext();) {
List gridUnits = (List) rowIter.next();
effRowGroup[i++] = new EffRow(rowIndex++, tablePart, gridUnits);
}
return effRowGroup;
}
}
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