author | František Kučera <franta-hg@frantovo.cz> |
Sat, 28 Dec 2013 12:19:39 +0100 | |
branch | v_0 |
changeset 88 | 102ba0fcb07f |
child 142 | da1e38386d84 |
permissions | -rw-r--r-- |
88
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/** |
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* SQL-DK |
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* Copyright © 2013 František Kučera (frantovo.cz) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package info.globalcode.sql.dk.formatting; |
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|
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import info.globalcode.sql.dk.Parameter; |
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import java.util.ArrayList; |
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import java.util.List; |
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/** |
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* Prefetches whole result set and computes column widths. Whole table is flushed at once in |
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* {@linkplain #writeEndResultSet()}. |
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* |
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* Long values will not overflow the cells, but whole result set must be loaded into memory. |
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* |
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* @author Ing. František Kučera (frantovo.cz) |
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*/ |
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public class TabularPrefetchingFormatter extends TabularFormatter { |
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public static final String NAME = "tabular-prefetching"; // bash-completion:formatter |
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private String currentSql; |
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private List<? extends Parameter> currentParameters; |
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private ColumnsHeader currentHeader; |
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private List<Object[]> currentResultSet; |
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private Object[] currentRow; |
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private int currentColumnsCount; |
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private boolean prefetchDone = false; |
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public TabularPrefetchingFormatter(FormatterContext formatterContext) { |
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super(formatterContext); |
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} |
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@Override |
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protected int getCurrentColumnsCount() { |
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if (prefetchDone) { |
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return super.getCurrentColumnsCount(); |
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} else { |
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return currentColumnsCount; |
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} |
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} |
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@Override |
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public void writeStartResultSet() { |
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currentResultSet = new ArrayList<>(); |
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} |
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@Override |
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public void writeQuery(String sql) { |
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currentSql = sql; |
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} |
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@Override |
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public void writeParameters(List<? extends Parameter> parameters) { |
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currentParameters = parameters; |
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} |
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@Override |
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public void writeColumnsHeader(ColumnsHeader header) { |
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currentHeader = header; |
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initColumnWidths(header.getColumnCount()); |
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} |
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@Override |
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public void writeStartRow() { |
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currentRow = new Object[currentHeader.getColumnCount()]; |
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currentResultSet.add(currentRow); |
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currentColumnsCount = 0; |
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} |
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@Override |
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public void writeColumnValue(Object value) { |
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currentRow[currentColumnsCount] = value; |
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currentColumnsCount++; |
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String textRepresentation = toString(value); |
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/** TODO: count only printable characters (currently not an issue) */ |
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updateColumnWidth(currentColumnsCount, textRepresentation.length()); |
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} |
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@Override |
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public void writeEndRow() { |
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// do nothing |
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} |
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@Override |
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public void writeEndResultSet() { |
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prefetchDone = true; |
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super.writeStartResultSet(); |
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super.writeQuery(currentSql); |
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super.writeParameters(currentParameters); |
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|
105 |
super.writeColumnsHeader(currentHeader); |
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parents:
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106 |
|
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TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
František Kučera <franta-hg@frantovo.cz>
parents:
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changeset
|
107 |
for (Object[] row : currentResultSet) { |
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parents:
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changeset
|
108 |
super.writeStartRow(); |
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TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
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parents:
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|
109 |
for (Object cell : row) { |
102ba0fcb07f
TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
110 |
super.writeColumnValue(cell); |
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TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
František Kučera <franta-hg@frantovo.cz>
parents:
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|
111 |
} |
102ba0fcb07f
TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
František Kučera <franta-hg@frantovo.cz>
parents:
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|
112 |
super.writeEndRow(); |
102ba0fcb07f
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František Kučera <franta-hg@frantovo.cz>
parents:
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|
113 |
} |
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parents:
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|
114 |
|
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TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
František Kučera <franta-hg@frantovo.cz>
parents:
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|
115 |
currentColumnsCount = 0; |
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František Kučera <franta-hg@frantovo.cz>
parents:
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|
116 |
currentSql = null; |
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František Kučera <franta-hg@frantovo.cz>
parents:
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|
117 |
currentParameters = null; |
102ba0fcb07f
TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
František Kučera <franta-hg@frantovo.cz>
parents:
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|
118 |
currentHeader = null; |
102ba0fcb07f
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František Kučera <franta-hg@frantovo.cz>
parents:
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|
119 |
currentRow = null; |
102ba0fcb07f
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
120 |
currentResultSet = null; |
102ba0fcb07f
TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
121 |
super.writeEndResultSet(); |
102ba0fcb07f
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František Kučera <franta-hg@frantovo.cz>
parents:
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|
122 |
prefetchDone = false; |
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
123 |
} |
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TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
František Kučera <franta-hg@frantovo.cz>
parents:
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|
124 |
} |