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215 lines
8.9 KiB
215 lines
8.9 KiB
// Tables_p.java
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// -----------------------
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// (C) 2010 by Michael Peter Christen; mc@yacy.net
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// first published 21.01.2010 in Frankfurt, Germany on http://yacy.net
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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 2 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, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.regex.Pattern;
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import net.yacy.cora.document.encoding.UTF8;
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import net.yacy.cora.protocol.RequestHeader;
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import net.yacy.cora.util.ConcurrentLog;
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import net.yacy.cora.util.SpaceExceededException;
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import net.yacy.kelondro.blob.Tables;
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import net.yacy.search.Switchboard;
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import net.yacy.server.serverObjects;
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import net.yacy.server.serverSwitch;
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public class Tables_p {
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public static serverObjects respond(@SuppressWarnings("unused") final RequestHeader header, final serverObjects post, final serverSwitch env) {
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final Switchboard sb = (Switchboard) env;
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final serverObjects prop = new serverObjects();
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prop.put("showtable", 0);
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prop.put("showedit", 0);
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prop.put("showselection", 0);
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String table = (post == null) ? null : post.get("table", null);
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if (table != null && !sb.tables.hasHeap(table)) table = null;
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// show table selection
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int count = 0;
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final Iterator<String> ti = sb.tables.iterator();
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String tablename;
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prop.put("showselection", 1);
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while (ti.hasNext()) {
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tablename = ti.next();
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prop.put("showselection_tables_" + count + "_name", tablename);
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prop.put("showselection_tables_" + count + "_selected", (table != null && table.equals(tablename)) ? 1 : 0);
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count++;
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}
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prop.put("showselection_tables", count);
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prop.put("showselection_pattern", "");
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if (post == null) return prop; // return rewrite properties
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final String counts = post.get("count", null);
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int maxcount = (counts == null || counts.equals("all")) ? Integer.MAX_VALUE : post.getInt("count", 10);
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final String pattern = post.get("search", "");
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final Pattern matcher = (pattern.isEmpty() || pattern.equals(".*")) ? null : Pattern.compile(".*" + pattern + ".*");
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prop.put("pattern", pattern);
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// apply deletion requests
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if (post.get("deletetable", "").length() > 0)
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sb.tables.clear(table);
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if (post.get("deleterows", "").length() > 0) {
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for (final Map.Entry<String, String> entry: post.entrySet()) {
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if (entry.getValue().startsWith("pk_")) try {
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sb.tables.delete(table, entry.getValue().substring(3).getBytes());
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} catch (final IOException e) {
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ConcurrentLog.logException(e);
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}
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}
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}
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if (post.get("commitrow", "").length() > 0) {
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final String pk = post.get("pk");
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final Map<String, byte[]> map = new HashMap<String, byte[]>();
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for (final Map.Entry<String, String> entry: post.entrySet()) {
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if (entry.getKey().startsWith("col_")) {
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map.put(entry.getKey().substring(4), entry.getValue().getBytes());
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}
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}
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try {
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sb.tables.update(table, pk.getBytes(), map);
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} catch (final IOException e) {
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ConcurrentLog.logException(e);
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}
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}
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// generate table
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prop.put("showtable", 0);
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prop.put("showedit", 0);
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if (table != null) {
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List<String> columns = null;
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try {
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columns = sb.tables.columns(table);
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} catch (final IOException e) {
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ConcurrentLog.logException(e);
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columns = new ArrayList<String>();
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}
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if (post.containsKey("editrow")) {
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// check if we can find a key
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String pk = null;
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for (final Map.Entry<String, String> entry: post.entrySet()) {
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if (entry.getValue().startsWith("pk_")) {
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pk = entry.getValue().substring(3);
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break;
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}
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}
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try {
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if (pk != null && sb.tables.has(table, pk.getBytes())) {
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setEdit(sb, prop, table, pk, columns);
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}
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} catch (final IOException e) {
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ConcurrentLog.logException(e);
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} catch (final SpaceExceededException e) {
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ConcurrentLog.logException(e);
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}
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} else if (post.containsKey("addrow")) try {
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// get a new key
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final String pk = UTF8.String(sb.tables.createRow(table));
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setEdit(sb, prop, table, pk, columns);
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} catch (final IOException e) {
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ConcurrentLog.logException(e);
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} catch (final SpaceExceededException e) {
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ConcurrentLog.logException(e);
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} else {
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prop.put("showtable", 1);
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prop.put("showtable_table", table);
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// insert the columns
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for (int i = 0; i < columns.size(); i++) {
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prop.putHTML("showtable_columns_" + i + "_header", columns.get(i));
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}
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prop.put("showtable_columns", columns.size());
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// insert all rows
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try {
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maxcount = Math.min(maxcount, sb.tables.size(table));
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} catch (final IOException e) {
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ConcurrentLog.logException(e);
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maxcount = 0;
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}
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count = 0;
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try {
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final Iterator<Tables.Row> plainIterator = sb.tables.iterator(table, matcher);
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final Iterator<Tables.Row> mapIterator = sb.tables.orderByPK(plainIterator, maxcount).iterator();
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Tables.Row row;
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boolean dark = true;
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byte[] cell;
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while (mapIterator.hasNext() && count < maxcount) {
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row = mapIterator.next();
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if (row == null) continue;
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// write table content
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prop.put("showtable_list_" + count + "_dark", ((dark) ? 1 : 0) ); dark=!dark;
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prop.put("showtable_list_" + count + "_pk", UTF8.String(row.getPK()));
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prop.put("showtable_list_" + count + "_count", count);
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for (int i = 0; i < columns.size(); i++) {
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cell = row.get(columns.get(i));
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prop.putHTML("showtable_list_" + count + "_columns_" + i + "_cell", cell == null ? "" : UTF8.String(cell));
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}
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prop.put("showtable_list_" + count + "_columns", columns.size());
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count++;
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}
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} catch (final IOException e) {
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ConcurrentLog.logException(e);
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}
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prop.put("showtable_list", count);
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prop.put("showtable_num", count);
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}
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}
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// adding the peer address
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prop.put("address", sb.peers.mySeed().getPublicAddress());
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// return rewrite properties
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return prop;
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}
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private static void setEdit(final Switchboard sb, final serverObjects prop, final String table, final String pk, final List<String> columns) throws IOException, SpaceExceededException {
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prop.put("showedit", 1);
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prop.put("showedit_table", table);
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prop.put("showedit_pk", pk);
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final Tables.Row row = sb.tables.select(table, pk.getBytes());
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if (row == null) return;
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int count = 0;
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byte[] cell;
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for (final String col: columns) {
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cell = row.get(col);
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prop.put("showedit_list_" + count + "_key", col);
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prop.put("showedit_list_" + count + "_value", cell == null ? "" : UTF8.String(cell));
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count++;
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}
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prop.put("showedit_list", count);
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}
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}
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