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234 lines
7.8 KiB
234 lines
7.8 KiB
// serverObjects.java
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// -----------------------
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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// last major change: 05.06.2004
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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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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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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.util.ArrayList;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.Map;
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import de.anomic.data.wikiCode;
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import de.anomic.http.httpHeader;
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public final class serverObjects extends Hashtable implements Cloneable {
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private static final long serialVersionUID = 1L;
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private httpHeader outgoingHeader;
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public void setOutgoingHeader(httpHeader outgoingHeader)
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{
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this.outgoingHeader=outgoingHeader;
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}
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public httpHeader getOutgoingHeader()
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{
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if(outgoingHeader!=null)
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return outgoingHeader;
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else
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return new httpHeader();
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}
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public serverObjects() {
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super();
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}
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public serverObjects(int initialCapacity) {
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super(initialCapacity);
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}
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public serverObjects(Map input) {
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super(input);
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}
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/**
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* like put, but it replaces any HTML special chars.
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*/
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public Object putNoHTML(Object key, String value){
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return put(key, wikiCode.replaceHTMLonly(value));
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}
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// new put takes also null values
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public Object put(Object key, Object 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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// byte[] variant
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public byte[] put(String key, byte[] value) {
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return (byte[]) this.put((Object) key, (Object) value);
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}
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// string variant
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public String put(String key, String value) {
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return (String) this.put((Object) key, (Object) value);
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}
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// long variant
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public long put(String key, long value) {
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String result = this.put(key, Long.toString(value));
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if (result == null) return 0; else try {
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return Long.parseLong(result);
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} catch (NumberFormatException e) {
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return 0;
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}
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}
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// inc variant: for counters
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public long inc(String key) {
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String c = (String) super.get(key);
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if (c == null) c = "0";
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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(String key, Object dflt) {
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Object result = super.get(key);
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if (result == null) return dflt; else return result;
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}
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// string variant
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public String get(String key, String dflt) {
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return (String) this.get(key, (Object) dflt);
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}
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public int getInt(String key, int dflt) {
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String s = (String) 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 (NumberFormatException e) {
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return dflt;
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}
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}
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public long getLong(String key, long dflt) {
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String s = (String) 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 (NumberFormatException e) {
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return dflt;
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}
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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(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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ArrayList v = new ArrayList();
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Enumeration e = keys();
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String key;
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while (e.hasMoreElements()) {
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key = (String) e.nextElement();
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if (key.matches(keyMapper)) v.add(get(key));
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}
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// make a String[]
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String[] result = new String[v.size()];
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for (int i = 0; i < v.size(); i++) result[i] = (String) v.get(i);
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return result;
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}
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// put all elements of another hastable into the own table
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public void putAll(serverObjects add) {
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Enumeration e = add.keys();
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Object k;
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while (e.hasMoreElements()) {
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k = e.nextElement();
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put(k, add.get(k));
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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(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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Enumeration e = keys();
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String key, value;
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while (e.hasMoreElements()) {
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key = (String) e.nextElement();
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value = ((String) get(key)).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 (Exception e){}
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}
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}
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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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} |