/*
* 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
* modification, 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 "Xerces" 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 (INCLUDING, 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 based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* .
*/
package sax.helpers;
import org.xml.sax.Attributes;
/**
* An Attributes implementation that can perform more operations
* than the attribute list helper supplied with the standard SAX2
* distribution.
*/
public class AttributesImpl
implements Attributes {
//
// Data
//
/** Head node. */
private ListNode head;
/** Tail node. */
private ListNode tail;
/** Length. */
private int length;
//
// Attributes methods
//
/** Returns the number of attributes. */
public int getLength() {
return length;
}
/** Returns the index of the specified attribute. */
public int getIndex(String raw) {
ListNode place = head;
int index = 0;
while (place != null) {
if (place.raw.equals(raw)) {
return index;
}
index++;
place = place.next;
}
return -1;
}
/** Returns the index of the specified attribute. */
public int getIndex(String uri, String local) {
ListNode place = head;
int index = 0;
while (place != null) {
if (place.uri.equals(uri) && place.local.equals(local)) {
return index;
}
index++;
place = place.next;
}
return -1;
}
/** Returns the attribute URI by index. */
public String getURI(int index) {
ListNode node = getListNodeAt(index);
return node != null ? node.uri : null;
} // getURI(int):String
/** Returns the attribute local name by index. */
public String getLocalName(int index) {
ListNode node = getListNodeAt(index);
return node != null ? node.local : null;
} // getLocalName(int):String
/** Returns the attribute raw name by index. */
public String getQName(int index) {
ListNode node = getListNodeAt(index);
return node != null ? node.raw : null;
} // getQName(int):String
/** Returns the attribute type by index. */
public String getType(int index) {
ListNode node = getListNodeAt(index);
return (node != null) ? node.type : null;
} // getType(int):String
/** Returns the attribute type by uri and local. */
public String getType(String uri, String local) {
ListNode node = getListNode(uri, local);
return (node != null) ? node.type : null;
} // getType(String,String):String
/** Returns the attribute type by raw name. */
public String getType(String raw) {
ListNode node = getListNode(raw);
return (node != null) ? node.type : null;
} // getType(String):String
/** Returns the attribute value by index. */
public String getValue(int index) {
ListNode node = getListNodeAt(index);
return (node != null) ? node.value : null;
} // getType(int):String
/** Returns the attribute value by uri and local. */
public String getValue(String uri, String local) {
ListNode node = getListNode(uri, local);
return (node != null) ? node.value : null;
} // getType(String):String
/** Returns the attribute value by raw name. */
public String getValue(String raw) {
ListNode node = getListNode(raw);
return (node != null) ? node.value : null;
} // getType(String):String
//
// Public methods
//
/** Adds an attribute. */
public void addAttribute(String raw, String type, String value) {
addAttribute(null, null, raw, type, value);
}
/** Adds an attribute. */
public void addAttribute(String uri, String local, String raw,
String type, String value) {
ListNode node = new ListNode(uri, local, raw, type, value);
if (length == 0) {
head = node;
}
else {
tail.next = node;
}
tail = node;
length++;
} // addAttribute(String,StringString,String,String)
/** Inserts an attribute. */
public void insertAttributeAt(int index,
String raw, String type, String value) {
insertAttributeAt(index, null, null, raw, type, value);
}
/** Inserts an attribute. */
public void insertAttributeAt(int index,
String uri, String local, String raw,
String type, String value) {
// if list is empty, add attribute
if (length == 0 || index >= length) {
addAttribute(uri, local, raw, type, value);
return;
}
// insert at beginning of list
ListNode node = new ListNode(uri, local, raw, type, value);
if (index < 1) {
node.next = head;
head = node;
}
else {
ListNode prev = getListNodeAt(index - 1);
node.next = prev.next;
prev.next = node;
}
length++;
} // insertAttributeAt(int,String,String,String,String,String)
/** Removes an attribute. */
public void removeAttributeAt(int index) {
if (length == 0) {
return;
}
if (index == 0) {
head = head.next;
if (head == null) {
tail = null;
}
length--;
}
else {
ListNode prev = getListNodeAt(index - 1);
ListNode node = getListNodeAt(index);
if (node != null) {
prev.next = node.next;
if (node == tail) {
tail = prev;
}
length--;
}
}
} // removeAttributeAt(int)
/** Removes the specified attribute. */
public void removeAttribute(String raw) {
removeAttributeAt(getIndex(raw));
}
/** Removes the specified attribute. */
public void removeAttribute(String uri, String local) {
removeAttributeAt(getIndex(uri, local));
}
//
// Private methods
//
/** Returns the node at the specified index. */
private ListNode getListNodeAt(int i) {
for (ListNode place = head; place != null; place = place.next) {
if (--i == -1) {
return place;
}
}
return null;
} // getListNodeAt(int):ListNode
/** Returns the first node with the specified uri and local. */
public ListNode getListNode(String uri, String local) {
if (uri != null && local != null) {
ListNode place = head;
while (place != null) {
if (place.uri != null && place.local != null &&
place.uri.equals(uri) && place.local.equals(local)) {
return place;
}
place = place.next;
}
}
return null;
} // getListNode(String,String):ListNode
/** Returns the first node with the specified raw name. */
private ListNode getListNode(String raw) {
if (raw != null) {
for (ListNode place = head; place != null; place = place.next) {
if (place.raw != null && place.raw.equals(raw)) {
return place;
}
}
}
return null;
} // getListNode(String):ListNode
//
// Object methods
//
/** Returns a string representation of this object. */
public String toString() {
StringBuffer str = new StringBuffer();
str.append('[');
str.append("len=");
str.append(length);
str.append(", {");
for (ListNode place = head; place != null; place = place.next) {
str.append(place.toString());
if (place.next != null) {
str.append(", ");
}
}
str.append("}]");
return str.toString();
} // toString():String
//
// Classes
//
/**
* An attribute node.
*/
static class ListNode {
//
// Data
//
/** Attribute uri. */
public String uri;
/** Attribute local. */
public String local;
/** Attribute raw. */
public String raw;
/** Attribute type. */
public String type;
/** Attribute value. */
public String value;
/** Next node. */
public ListNode next;
//
// Constructors
//
/** Constructs a list node. */
public ListNode(String uri, String local, String raw,
String type, String value) {
this.uri = uri;
this.local = local;
this.raw = raw;
this.type = type;
this.value = value;
} // (String,String,String,String,String)
//
// Object methods
//
/** Returns string representation of this object. */
public String toString() {
return raw != null ? raw : local;
}
} // class ListNode
} // class AttributesImpl