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/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Fop" and "Apache Software Foundation" must not be used to
endorse or promote products derived from this software without prior
written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
James Tauber <jtauber@jtauber.com>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.fop.configuration;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import java.util.Hashtable;
import java.util.Vector;
import org.apache.fop.messaging.MessageHandler;
/**
* SAX2 Handler which retrieves the configuration information and stores them in Configuration.
* Normally this class doesn't need to be accessed directly.
*/
public class ConfigurationParser extends DefaultHandler {
private final int OUT = 0;
private final int IN_ENTRY = 1;
private final int IN_KEY = 2;
private final int IN_VALUE = 4;
private final int IN_LIST = 8;
private final int IN_SUBENTRY = 16;
private final int IN_SUBKEY = 32;
private final int STRING = 0;
private final int LIST = 1;
private final int MAP = 2;
//state of parser
private int status = OUT;
private int datatype = -1;
//store the result configuration
private static Hashtable configuration;
private static Hashtable activeConfiguration;
//stores key for new config entry
private String key = "";
//stores string value
private String value = "";
//stores key for new config entry
private String subkey = "";
//stores list value
private Vector list = new Vector (15);
//stores hashtable value
private Hashtable map = new Hashtable(15);
/** locator for line number information */
private Locator locator;
/** determines role / target of configuration information, default is standard */
private String role = "standard";
public void startDocument() {
configuration = Configuration.getConfiguration();
}
/** get locator for position information */
public void setDocumentLocator(Locator locator) {
this.locator = locator;
}
/**
* extracts the element and attribute name and sets the fitting status and datatype values
* */
public void startElement(String uri, String localName,
String qName, Attributes attributes) {
if (localName.equals("key")) {
status += IN_KEY;
} else if (localName.equals("value")) {
status += IN_VALUE;
} else if (localName.equals("list")) {
status += IN_LIST;
} else if (localName.equals("subentry")) {
status += IN_SUBENTRY;
} else if (localName.equals("entry")) {
//role=standard as default
if (attributes.getLength() == 0) {
role = "standard";
//retrieve attribute value for "role" which determines configuration target
} else {
role = attributes.getValue("role");
}
} else if (localName.equals("configuration") ) {
} else {
//to make sure that user knows about false tag
MessageHandler.errorln(
"Unknown tag in configuration file: " + localName);
}
} //end startElement
/**
* stores subentries or entries into their hashes (map for subentries, configuration for entry)
*/
public void endElement(String uri, String localName, String qName) {
if (localName.equals("entry")) {
switch (datatype) {
case STRING:
this.store(role, key, value);
break;
case LIST:
this.store(role, key, list);
break;
case MAP:
this.store(role, key, map);
}
status = OUT;
role = "standard";
} else if (localName.equals("subentry")) {
map.put(subkey, value);
status -= IN_SUBENTRY;
} else if (localName.equals("key")) {
status -= IN_KEY;
} else if (localName.equals("list")) {
status -= IN_LIST;
} else if (localName.equals("value")) {
status -= IN_VALUE;
}
}
/**
* extracts characters from text nodes and puts them into their respective
* variables
*/
public void characters(char[] ch, int start, int length) {
char characters [] = new char [length];
System.arraycopy(ch, start, characters, 0, length);
String text = new String(characters);
switch (status) {
case IN_KEY:
key = text;
break;
case IN_LIST + IN_SUBENTRY + IN_KEY:
subkey = text;
break;
case IN_VALUE:
value = text;
datatype = STRING;
break;
case IN_LIST + IN_VALUE:
list.add(text);
datatype = LIST;
break;
case IN_LIST + IN_SUBENTRY + IN_VALUE:
value = text;
datatype = MAP;
break;
}
} //end characters
/**
* stores configuration entry into configuration hashtable according to the role
*
* @param role a string containing the role / target for this configuration information
* @param key a string containing the key value for the configuration
* @param value a string containing the value for the configuration
*/
private void store (String role, String key, Object value) {
activeConfiguration = (Hashtable) configuration.get(role);
if (activeConfiguration != null) {
activeConfiguration.put(key,value);
} else {
MessageHandler.errorln("Unknown role >" + role + "< for new configuration entry. \n"
+"Putting configuration with key:" + key + " into standard configuration.");
}
}
}
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