| /* |
| * 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 |
| * <http://www.apache.org/>. |
| */ |
| |
| package sax.helpers; |
| |
| import org.xml.sax.AttributeList; |
| |
| /** |
| * An AttributeList implementation that can perform more operations |
| * than the attribute list helper supplied with the standard SAX |
| * distribution. |
| */ |
| public class AttributeListImpl |
| implements AttributeList { |
| |
| // |
| // Data |
| // |
| |
| /** Head node. */ |
| private ListNode head; |
| |
| /** Tail node. */ |
| private ListNode tail; |
| |
| /** Length. */ |
| private int length; |
| |
| // |
| // AttributeList methods |
| // |
| |
| /** Returns the number of attributes. */ |
| public int getLength() { |
| return length; |
| } |
| |
| /** Returns the attribute name by index. */ |
| public String getName(int index) { |
| |
| ListNode node = getNodeAt(index); |
| return (node != null) ? node.name : null; |
| |
| } // getName(int):String |
| |
| /** Returns the attribute type by index. */ |
| public String getType(int index) { |
| |
| ListNode node = getNodeAt(index); |
| return (node != null) ? node.type : null; |
| |
| } // getType(int):String |
| |
| /** Returns the attribute value by index. */ |
| public String getValue(int index) { |
| |
| ListNode node = getNodeAt(index); |
| return (node != null) ? node.value : null; |
| |
| } // getType(int):String |
| |
| /** Returns the attribute type by name. */ |
| public String getType(String name) { |
| |
| ListNode node = getNodeAt(name); |
| return (node != null) ? node.type : null; |
| |
| } // getType(int):String |
| |
| /** Returns the attribute value by name. */ |
| public String getValue(String name) { |
| |
| ListNode node = getNodeAt(name); |
| return (node != null) ? node.value : null; |
| |
| } // getType(int):String |
| |
| // |
| // Public methods |
| // |
| |
| /** Adds an attribute. */ |
| public void addAttribute(String name, String type, String value) { |
| |
| ListNode node = new ListNode(name, type, value); |
| if (length == 0) { |
| head = node; |
| } |
| else { |
| tail.next = node; |
| } |
| tail = node; |
| length++; |
| |
| } // addAttribute(String,String,String) |
| |
| /** Inserts an attribute. */ |
| public void insertAttributeAt(int index, |
| String name, String type, String value) { |
| |
| // if list is empty, add attribute |
| if (length == 0 || index >= length) { |
| addAttribute(name, type, value); |
| return; |
| } |
| |
| // insert at beginning of list |
| ListNode node = new ListNode(name, type, value); |
| if (index < 1) { |
| node.next = head; |
| head = node; |
| } |
| else { |
| ListNode prev = getNodeAt(index - 1); |
| node.next = prev.next; |
| prev.next = node; |
| } |
| length++; |
| |
| } // addAttribute(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 = getNodeAt(index - 1); |
| ListNode node = getNodeAt(index); |
| if (node != null) { |
| prev.next = node.next; |
| if (node == tail) { |
| tail = prev; |
| } |
| length--; |
| } |
| } |
| |
| } // removeAttributeAt(int) |
| |
| // |
| // Private methods |
| // |
| |
| /** Returns the node at the specified index. */ |
| private ListNode getNodeAt(int i) { |
| |
| for (ListNode place = head; place != null; place = place.next) { |
| if (--i == -1) { |
| return place; |
| } |
| } |
| |
| return null; |
| |
| } // getNodeAt(int):ListNode |
| |
| /** Returns the first node with the specified name. */ |
| private ListNode getNodeAt(String name) { |
| |
| if (name != null) { |
| for (ListNode place = head; place != null; place = place.next) { |
| if (place.name.equals(name)) { |
| return place; |
| } |
| } |
| } |
| |
| return null; |
| |
| } // getNodeAt(int):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.name); |
| if (place.next != null) { |
| str.append(", "); |
| } |
| } |
| str.append("}]"); |
| |
| return str.toString(); |
| |
| } // toString():String |
| |
| // |
| // Classes |
| // |
| |
| /** |
| * An attribute node. |
| */ |
| static class ListNode { |
| |
| // |
| // Data |
| // |
| |
| /** Attribute name. */ |
| public String name; |
| |
| /** Attribute type. */ |
| public String type; |
| |
| /** Attribute value. */ |
| public String value; |
| |
| /** Next node. */ |
| public ListNode next; |
| |
| // |
| // Constructors |
| // |
| |
| /** Default constructor. */ |
| public ListNode(String name, String type, String value) { |
| this.name = name; |
| this.type = type; |
| this.value = value; |
| } |
| |
| } // class ListNode |
| |
| } // class AttributeListImpl |
