aoqi@0: /*
aoqi@0:  * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.stream.buffer;
aoqi@0: 
aoqi@0: import org.xml.sax.Attributes;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Class for holding attributes.
aoqi@0:  *
aoqi@0:  * Since it implements {@link Attributes}, this class follows the SAX convention
aoqi@0:  * of using "" instead of null.
aoqi@0:  */
aoqi@0: @SuppressWarnings({"PointlessArithmeticExpression"})
aoqi@0: public final class AttributesHolder implements Attributes {
aoqi@0:     private static final int DEFAULT_CAPACITY = 8;
aoqi@0:     private static final int ITEM_SIZE = 1 << 3;
aoqi@0: 
aoqi@0:     private static final int PREFIX     = 0;
aoqi@0:     private static final int URI        = 1;
aoqi@0:     private static final int LOCAL_NAME = 2;
aoqi@0:     private static final int QNAME      = 3;
aoqi@0:     private static final int TYPE       = 4;
aoqi@0:     private static final int VALUE      = 5;
aoqi@0: 
aoqi@0:     private int _attributeCount;
aoqi@0: 
aoqi@0:     private String[] _strings;
aoqi@0: 
aoqi@0:     public AttributesHolder() {
aoqi@0:         _strings = new String[DEFAULT_CAPACITY * ITEM_SIZE];
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final int getLength() {
aoqi@0:         return _attributeCount;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getPrefix(int index) {
aoqi@0:         return (index >= 0 && index < _attributeCount) ?
aoqi@0:             _strings[(index << 3) + PREFIX] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getLocalName(int index) {
aoqi@0:         return (index >= 0 && index < _attributeCount) ?
aoqi@0:             _strings[(index << 3) + LOCAL_NAME] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getQName(int index) {
aoqi@0:         return (index >= 0 && index < _attributeCount) ?
aoqi@0:             _strings[(index << 3) + QNAME] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getType(int index) {
aoqi@0:         return (index >= 0 && index < _attributeCount) ?
aoqi@0:             _strings[(index << 3) + TYPE] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getURI(int index) {
aoqi@0:         return (index >= 0 && index < _attributeCount) ?
aoqi@0:             _strings[(index << 3) + URI] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getValue(int index) {
aoqi@0:         return (index >= 0 && index < _attributeCount) ?
aoqi@0:             _strings[(index << 3) + VALUE] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final int getIndex(String qName) {
aoqi@0:         for (int i = 0; i < _attributeCount; i++) {
aoqi@0:             if (qName.equals(_strings[(i << 3) + QNAME])) {
aoqi@0:                 return i;
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return -1;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getType(String qName) {
aoqi@0:         final int i = (getIndex(qName) << 3) + TYPE;
aoqi@0:         return (i >= 0) ? _strings[i] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getValue(String qName) {
aoqi@0:         final int i = (getIndex(qName) << 3) + VALUE;
aoqi@0:         return (i >= 0) ? _strings[i] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final int getIndex(String uri, String localName) {
aoqi@0:         for (int i = 0; i < _attributeCount; i++) {
aoqi@0:             if (localName.equals(_strings[(i << 3) + LOCAL_NAME]) &&
aoqi@0:                 uri.equals(_strings[(i << 3) + URI])) {
aoqi@0:                 return i;
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return -1;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getType(String uri, String localName) {
aoqi@0:         final int i = (getIndex(uri, localName) << 3) + TYPE;
aoqi@0:         return (i >= 0) ? _strings[i] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final String getValue(String uri, String localName) {
aoqi@0:         final int i = (getIndex(uri, localName) << 3) + VALUE;
aoqi@0:         return (i >= 0) ? _strings[i] : null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public final void clear() {
aoqi@0:         if (_attributeCount > 0) {
aoqi@0:             for (int i = 0; i < _attributeCount; i++) {
aoqi@0:                 _strings[(i << 3) + VALUE] = null;
aoqi@0:             }
aoqi@0:             _attributeCount = 0;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Add an attribute using a qualified name that contains the
aoqi@0:      * prefix and local name.
aoqi@0:      *
aoqi@0:      * @param uri
aoqi@0:      *      This can be empty but not null, just like everywhere else in SAX.
aoqi@0:      */
aoqi@0:     public final void addAttributeWithQName(String uri, String localName, String qName, String type, String value) {
aoqi@0:         final int i = _attributeCount << 3;
aoqi@0:         if (i == _strings.length) {
aoqi@0:             resize(i);
aoqi@0:         }
aoqi@0: 
aoqi@0:         _strings[i + PREFIX] = null;
aoqi@0:         _strings[i + URI] = uri;
aoqi@0:         _strings[i + LOCAL_NAME] = localName;
aoqi@0:         _strings[i + QNAME] = qName;
aoqi@0:         _strings[i + TYPE] = type;
aoqi@0:         _strings[i + VALUE] = value;
aoqi@0: 
aoqi@0:         _attributeCount++;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Add an attribute using a prefix.
aoqi@0:      *
aoqi@0:      * @param prefix
aoqi@0:      *      This can be empty but not null, just like everywhere else in SAX.
aoqi@0:      * @param uri
aoqi@0:      *      This can be empty but not null, just like everywhere else in SAX.
aoqi@0:      */
aoqi@0:     public final void addAttributeWithPrefix(String prefix, String uri, String localName, String type, String value) {
aoqi@0:         final int i = _attributeCount << 3;
aoqi@0:         if (i == _strings.length) {
aoqi@0:             resize(i);
aoqi@0:         }
aoqi@0: 
aoqi@0:         _strings[i + PREFIX] = prefix;
aoqi@0:         _strings[i + URI] = uri;
aoqi@0:         _strings[i + LOCAL_NAME] = localName;
aoqi@0:         _strings[i + QNAME] = null;
aoqi@0:         _strings[i + TYPE] = type;
aoqi@0:         _strings[i + VALUE] = value;
aoqi@0: 
aoqi@0:         _attributeCount++;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private void resize(int length) {
aoqi@0:         final int newLength = length * 2;
aoqi@0:         final String[] strings = new String[newLength];
aoqi@0:         System.arraycopy(_strings, 0, strings, 0, length);
aoqi@0:         _strings = strings;
aoqi@0:     }
aoqi@0: 
aoqi@0: }