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336 lines
12 KiB
336 lines
12 KiB
//serverObjects.java
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//-----------------------
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//(C) by Michael Peter Christen; mc@yacy.net
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//first published on http://www.anomic.de
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//Frankfurt, Germany, 2004
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//(C) changes by Bjoern 'fuchs' Krombholz
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//
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// $LastChangedDate: $
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// $LastChangedRevision: $
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// $LastChangedBy: $
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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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//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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//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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/*
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Why do we need this Class?
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The purpose of this class is to provide a hashtable object to the server
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and implementing interfaces. Values to and from cgi pages are encapsulated in
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this object. The server shall be executable in a Java 1.0 environment,
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so the following other options did not comply:
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Properties - setProperty would be needed, but only available in 1.2
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HashMap, TreeMap - only in 1.2
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Hashtable - available in 1.0, but 'put' does not accept null values
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So this class was created as a convenience.
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It will also contain special methods that read data from internet-resources
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in the background, while data can already be read out of the object.
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This shall speed up usage when a slow internet connection is used (dial-up)
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*/
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package de.anomic.server;
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.net.InetAddress;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.Map;
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import de.anomic.htmlFilter.htmlFilterCharacterCoding;
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import de.anomic.kelondro.order.DateFormatter;
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import de.anomic.plasma.plasmaSwitchboard;
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import de.anomic.tools.Formatter;
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public class serverObjects extends HashMap<String, String> implements Cloneable {
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private static final long serialVersionUID = 1L;
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private boolean localized = true;
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public serverObjects() {
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super();
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}
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public serverObjects(final int initialCapacity) {
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super(initialCapacity);
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}
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public serverObjects(final Map<String, String> input) {
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super(input);
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}
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/**
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* Add a key-value pair of Objects to the map.
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* @param key This method will do nothing if the key is <code>null</code>.
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* @param value The value that should be mapped to the key.
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* If value is <code>null</code>, then the element at <code>key</code>
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* is removed from the map.
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* @return The value that was added to the map.
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* @see java.util.Hashtable#put(K, V)
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*/
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public String put(final String key, final String value) {
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if (key == null) {
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// this does nothing
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return null;
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} else if (value == null) {
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// assigning the null value creates the same effect like removing the element
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return super.remove(key);
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} else {
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return super.put(key, value);
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}
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}
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/**
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* Add byte array to the map, value is kept as it is.
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* @param key key name as String.
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* @param value mapped value as a byte array.
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* @return the previous value as String.
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*/
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public String put(final String key, final byte[] value) {
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return this.put(key, new String(value)); //TODO: do we need an encoding method for byte[]?
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}
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/**
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* Add an unformatted String representation of a double/float value
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* to the map.
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* @param key key name as String.
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* @param value value as double/float.
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* @return value as it was added to the map or <code>NaN</code> if an error occured.
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*/
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public double put(final String key, final double value) {
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if (null == this.put(key, Double.toString(value))) {
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return Double.NaN;
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}
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return value;
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}
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/**
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* same as {@link #put(String, double)} but for integer types
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* @return Returns 0 for the error case.
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*/
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public long put(final String key, final long value) {
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if (null == this.put(key, Long.toString(value))) {
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return 0;
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}
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return value;
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}
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public String put(final String key, final java.util.Date value) {
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return this.put(key, value.toString());
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}
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public String put(final String key, final DateFormatter value) {
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return this.put(key, value.toString());
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}
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public String put(final String key, final InetAddress value) {
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return this.put(key, value.toString());
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}
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/**
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* Add a String to the map. The content of the String is escaped to be usable in HTML output.
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* @param key key name as String.
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* @param value a String that will be reencoded for HTML output.
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* @return the modified String that was added to the map.
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* @see htmlFilterCharacterCoding#encodeUnicode2html(String, boolean)
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*/
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public String putHTML(final String key, final String value) {
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return put(key, htmlFilterCharacterCoding.unicode2html(value, true));
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}
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/**
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* Like {@link #putHTML(String, String)} but takes an extra argument defining, if the returned
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* String should be used in normal HTML: <code>false</code>.
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* If forXML is <code>true</code>, then only the characters <b>& " < ></b> will be
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* replaced in the returned String.
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*/
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public String putXML(final String key, final String value) {
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return put(key, htmlFilterCharacterCoding.unicode2xml(value, true));
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}
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/**
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* Add a byte/long/integer to the map. The number will be encoded into a String using
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* a localized format specified by {@link Formatter} and {@link #setLocalized(boolean)}.
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* @param key key name as String.
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* @param value integer type value to be added to the map in its formatted String
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* representation.
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* @return the String value added to the map.
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*/
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public String putNum(final String key, final long value) {
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return this.put(key, Formatter.number(value, this.localized));
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}
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/**
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* Variant for double/float types.
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* @see #putNum(String, long)
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*/
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public String putNum(final String key, final double value) {
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return this.put(key, Formatter.number(value, this.localized));
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}
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/**
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* Variant for string encoded numbers.
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* @see #putNum(String, long)
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*/
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public String putNum(final String key, final String value) {
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return this.put(key, Formatter.number(value));
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}
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public String putWiki(final String key, final String wikiCode){
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return this.put(key, plasmaSwitchboard.wikiParser.transform(wikiCode));
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}
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public String putWiki(final String key, final byte[] wikiCode) {
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try {
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return this.put(key, plasmaSwitchboard.wikiParser.transform(wikiCode));
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} catch (final UnsupportedEncodingException e) {
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return this.put(key, "Internal error pasting wiki-code: " + e.getMessage());
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}
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}
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public String putWiki(final String key, final String wikiCode, final String publicAddress) {
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return this.put(key, plasmaSwitchboard.wikiParser.transform(wikiCode, publicAddress));
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}
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public String putWiki(final String key, final byte[] wikiCode, final String publicAddress) {
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try {
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return this.put(key, plasmaSwitchboard.wikiParser.transform(wikiCode, "UTF-8", publicAddress));
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} catch (final UnsupportedEncodingException e) {
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return this.put(key, "Internal error pasting wiki-code: " + e.getMessage());
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}
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}
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// inc variant: for counters
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public long inc(final String key) {
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String c = super.get(key);
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if (c == null) c = "0";
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final long l = Long.parseLong(c) + 1;
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super.put(key, Long.toString(l));
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return l;
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}
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// new get with default objects
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public Object get(final String key, final Object dflt) {
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final Object result = super.get(key);
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if (result == null) return dflt;
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return result;
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}
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// string variant
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public String get(final String key, final String dflt) {
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final Object result = super.get(key);
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if (result == null) return dflt;
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return (String) result;
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}
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public int getInt(final String key, final int dflt) {
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final String s = super.get(key);
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if (s == null) return dflt;
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try {
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return Integer.parseInt(s);
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} catch (final NumberFormatException e) {
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return dflt;
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}
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}
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public long getLong(final String key, final long dflt) {
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final String s = super.get(key);
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if (s == null) return dflt;
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try {
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return Long.parseLong(s);
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} catch (final NumberFormatException e) {
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return dflt;
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}
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}
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public double getDouble(final String key, final double dflt) {
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final String s = super.get(key);
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if (s == null) return dflt;
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try {
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return Double.parseDouble(s);
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} catch (final NumberFormatException e) {
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return dflt;
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}
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}
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public boolean hasValue(final String key) {
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final String s = super.get(key);
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if (s == null) return false;
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if (s == "") return false;
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return true;
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}
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// returns a set of all values where their key mappes the keyMapper
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public String[] getAll(final String keyMapper) {
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// the keyMapper may contain regular expressions as defined in String.matches
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// this method is particulary useful when parsing the result of checkbox forms
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final ArrayList<String> v = new ArrayList<String>();
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String key;
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for (Map.Entry<String, String> entry: entrySet()) {
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key = entry.getKey();
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if (key.matches(keyMapper)) v.add(entry.getValue());
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}
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// make a String[]
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final String[] result = new String[v.size()];
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for (int i = 0; i < v.size(); i++) result[i] = v.get(i);
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return result;
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}
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// put all elements of another hashtable into the own table
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public void putAll(final serverObjects add) {
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for (Map.Entry<String, String> entry: add.entrySet()) {
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put(entry.getKey(), entry.getValue());
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}
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}
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// convenience methods for storing and loading to a file system
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public void store(final File f) throws IOException {
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BufferedOutputStream fos = null;
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try {
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fos = new BufferedOutputStream(new FileOutputStream(f));
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String key, value;
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for (Map.Entry<String, String> entry: entrySet()) {
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key = entry.getKey();
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value = entry.getValue().replaceAll("\n", "\\\\n");
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fos.write((key + "=" + value + "\r\n").getBytes());
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}
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} finally {
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if (fos != null) {
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try {
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fos.flush();
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fos.close();
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} catch (final Exception e){}
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}
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}
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}
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/**
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* Defines the localization state of this object.
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* Currently it is used for numbers added with the putNum() methods only.
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* @param loc if <code>true</code> store numbers in a localized format, otherwise
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* use a default english locale without grouping.
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* @see Formatter#setLocale(String)
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*/
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public void setLocalized(final boolean loc) {
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this.localized = loc;
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}
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public Object clone() {
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return super.clone();
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}
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}
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