//serverObjects.java
//-----------------------
//(C) by Michael Peter Christen; mc@yacy.net
//first published on http://www.anomic.de
//Frankfurt, Germany, 2004
//(C) changes by Bjoern 'fuchs' Krombholz
//
// $LastChangedDate: $
// $LastChangedRevision: $
// $LastChangedBy: $
//
//This program is free software; you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation; either version 2 of the License, or
//(at your option) any later version.
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/*
Why do we need this Class?
The purpose of this class is to provide a hashtable object to the server
and implementing interfaces. Values to and from cgi pages are encapsulated in
this object. The server shall be executable in a Java 1.0 environment,
so the following other options did not comply:
Properties - setProperty would be needed, but only available in 1.2
HashMap, TreeMap - only in 1.2
Hashtable - available in 1.0, but 'put' does not accept null values
So this class was created as a convenience.
It will also contain special methods that read data from internet-resources
in the background, while data can already be read out of the object.
This shall speed up usage when a slow internet connection is used (dial-up)
*/
package de.anomic.server;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import de.anomic.document.parser.html.CharacterCoding;
import de.anomic.kelondro.util.DateFormatter;
import de.anomic.search.Switchboard;
import de.anomic.tools.Formatter;
public class serverObjects extends HashMap<String, String> implements Cloneable {
private static final long serialVersionUID = 1L;
private boolean localized = true;
public serverObjects() {
super();
}
public serverObjects(final int initialCapacity) {
super(initialCapacity);
}
public serverObjects(final Map<String, String> input) {
super(input);
}
/**
* Add a key-value pair of Objects to the map.
* @param key This method will do nothing if the key is <code>null</code>.
* @param value The value that should be mapped to the key.
* If value is <code>null</code>, then the element at <code>key</code>
* is removed from the map.
* @return The value that was added to the map.
* @see java.util.Hashtable#put(K, V)
*/
public String put(final String key, final String value) {
if (key == null) {
// this does nothing
return null;
} else if (value == null) {
// assigning the null value creates the same effect like removing the element
return super.remove(key);
} else {
return super.put(key, value);
}
}
/**
* Add byte array to the map, value is kept as it is.
* @param key key name as String.
* @param value mapped value as a byte array.
* @return the previous value as String.
*/
public String put(final String key, final byte[] value) {
try {
return this.put(key, new String(value, "UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return null;
}
}
/**
* Add an unformatted String representation of a double/float value
* to the map.
* @param key key name as String.
* @param value value as double/float.
* @return value as it was added to the map or <code>NaN</code> if an error occured.
*/
public double put(final String key, final double value) {
if (null == this.put(key, Double.toString(value))) {
return Double.NaN;
}
return value;
}
/**
* same as {@link #put(String, double)} but for integer types
* @return Returns 0 for the error case.
*/
public long put(final String key, final long value) {
if (null == this.put(key, Long.toString(value))) {
return 0;
}
return value;
}
public String put(final String key, final java.util.Date value) {
return this.put(key, value.toString());
}
public String put(final String key, final DateFormatter value) {
return this.put(key, value.toString());
}
public String put(final String key, final InetAddress value) {
return this.put(key, value.toString());
}
/**
* Add a String to the map. The content of the String is escaped to be usable in JSON output.
* @param key key name as String.
* @param value a String that will be reencoded for JSON output.
* @return the modified String that was added to the map.
*/
public String putJSON(final String key, String value) {
value = value.replaceAll("\"", "'");
value = value.replaceAll("/", "\\/");
// value = value.replaceAll("\\", "\\\\");
value = value.replaceAll("\b", "\\b");
value = value.replaceAll("\f", "\\f");
value = value.replaceAll("\n", "\\r");
value = value.replaceAll("\r", "\\r");
value = value.replaceAll("\t", "\\t");
return put(key, value);
}
public String putJSON(final String key, final byte[] value) {
return putJSON(key, new String(value));
}
/**
* Add a String to the map. The content of the String is escaped to be usable in HTML output.
* @param key key name as String.
* @param value a String that will be reencoded for HTML output.
* @return the modified String that was added to the map.
* @see CharacterCoding#encodeUnicode2html(String, boolean)
*/
public String putHTML(final String key, final String value) {
return put(key, CharacterCoding.unicode2html(value, true));
}
public String putHTML(final String key, final byte[] value) {
return putHTML(key, new String(value));
}
/**
* Like {@link #putHTML(String, String)} but takes an extra argument defining, if the returned
* String should be used in normal HTML: <code>false</code>.
* If forXML is <code>true</code>, then only the characters <b>& " < ></b> will be
* replaced in the returned String.
*/
public String putXML(final String key, final String value) {
return put(key, CharacterCoding.unicode2xml(value, true));
}
/**
* Add a byte/long/integer to the map. The number will be encoded into a String using
* a localized format specified by {@link Formatter} and {@link #setLocalized(boolean)}.
* @param key key name as String.
* @param value integer type value to be added to the map in its formatted String
* representation.
* @return the String value added to the map.
*/
public String putNum(final String key, final long value) {
return this.put(key, Formatter.number(value, this.localized));
}
/**
* Variant for double/float types.
* @see #putNum(String, long)
*/
public String putNum(final String key, final double value) {
return this.put(key, Formatter.number(value, this.localized));
}
/**
* Variant for string encoded numbers.
* @see #putNum(String, long)
*/
public String putNum(final String key, final String value) {
return this.put(key, Formatter.number(value));
}
public String putWiki(final String key, final String wikiCode){
return this.put(key, Switchboard.wikiParser.transform(wikiCode));
}
public String putWiki(final String key, final byte[] wikiCode) {
try {
return this.put(key, Switchboard.wikiParser.transform(wikiCode));
} catch (final UnsupportedEncodingException e) {
return this.put(key, "Internal error pasting wiki-code: " + e.getMessage());
}
}
// inc variant: for counters
public long inc(final String key) {
String c = super.get(key);
if (c == null) c = "0";
final long l = Long.parseLong(c) + 1;
super.put(key, Long.toString(l));
return l;
}
// new get with default objects
public Object get(final String key, final Object dflt) {
final Object result = super.get(key);
if (result == null) return dflt;
return result;
}
// string variant
public String get(final String key, final String dflt) {
final Object result = super.get(key);
if (result == null) return dflt;
return (String) result;
}
public int getInt(final String key, final int dflt) {
final String s = super.get(key);
if (s == null) return dflt;
try {
return Integer.parseInt(s);
} catch (final NumberFormatException e) {
return dflt;
}
}
public long getLong(final String key, final long dflt) {
final String s = super.get(key);
if (s == null) return dflt;
try {
return Long.parseLong(s);
} catch (final NumberFormatException e) {
return dflt;
}
}
public double getDouble(final String key, final double dflt) {
final String s = super.get(key);
if (s == null) return dflt;
try {
return Double.parseDouble(s);
} catch (final NumberFormatException e) {
return dflt;
}
}
public boolean hasValue(final String key) {
final String s = super.get(key);
if (s == null) return false;
if (s == "") return false;
return true;
}
// returns a set of all values where their key mappes the keyMapper
public String[] getAll(final String keyMapper) {
// the keyMapper may contain regular expressions as defined in String.matches
// this method is particulary useful when parsing the result of checkbox forms
final ArrayList<String> v = new ArrayList<String>();
String key;
for (Map.Entry<String, String> entry: entrySet()) {
key = entry.getKey();
if (key.matches(keyMapper)) v.add(entry.getValue());
}
// make a String[]
final String[] result = new String[v.size()];
for (int i = 0; i < v.size(); i++) result[i] = v.get(i);
return result;
}
// put all elements of another hashtable into the own table
public void putAll(final serverObjects add) {
for (Map.Entry<String, String> entry: add.entrySet()) {
put(entry.getKey(), entry.getValue());
}
}
// convenience methods for storing and loading to a file system
public void store(final File f) throws IOException {
BufferedOutputStream fos = null;
try {
fos = new BufferedOutputStream(new FileOutputStream(f));
String key, value;
for (Map.Entry<String, String> entry: entrySet()) {
key = entry.getKey();
value = entry.getValue().replaceAll("\n", "\\\\n");
fos.write((key + "=" + value + "\r\n").getBytes());
}
} finally {
if (fos != null) {
try {
fos.flush();
fos.close();
} catch (final Exception e){}
}
}
}
/**
* Defines the localization state of this object.
* Currently it is used for numbers added with the putNum() methods only.
* @param loc if <code>true</code> store numbers in a localized format, otherwise
* use a default english locale without grouping.
* @see Formatter#setLocale(String)
*/
public void setLocalized(final boolean loc) {
this.localized = loc;
}
public Object clone() {
return super.clone();
}
}