Source Code Cross Referenced for Attrs.java in  » 6.0-JDK-Modules » j2me » com » sun » ukit » jaxp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.ukit.jaxp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  
003:         *
004:         * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation.
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt).
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions.
025:         */
026:
027:        package com.sun.ukit.jaxp;
028:
029:        import org.xml.sax.Attributes;
030:
031:        /**
032:         * SAX Attributes interface implementation.
033:         */
034:
035:        /* package */class Attrs implements  org.xml.sax.Attributes {
036:            /**
037:             * Attributes string array. Each individual attribute is reprecented by 
038:             * four strings: namespace URL(+0), qname(+1), local name(+2), value(+3),
039:             * type(+4). 
040:             * In order to find attribute by the attrubute index, the attribute 
041:             * index MUST be multiplied by 8. The result will point to the attribute 
042:             * namespace URL. 
043:             */
044:            /* package */String[] mItems;
045:
046:            /**
047:             * Number of attributes in the attributes string array.
048:             */
049:            private char mLength;
050:
051:            /**
052:             * Constructor.
053:             */
054:            /* package */Attrs() {
055:                //		The default number of attributies capacity is 8.
056:                mItems = new String[(8 << 3)];
057:            }
058:
059:            /**
060:             * Sets up the number of attributes and ensure the capacity of 
061:             * the attribute string array.
062:             *
063:             * @param length The number of attributes in the object.
064:             */
065:            /* package */void setLength(char length) {
066:                if (length > ((char) (mItems.length >> 3))) {
067:                    mItems = new String[length << 3];
068:                }
069:                mLength = length;
070:            }
071:
072:            /**
073:             * Return the number of attributes in the list.
074:             *
075:             * <p>Once you know the number of attributes, you can iterate
076:             * through the list.</p>
077:             *
078:             * @return The number of attributes in the list.
079:             * @see #getURI(int)
080:             * @see #getLocalName(int)
081:             * @see #getQName(int)
082:             * @see #getType(int)
083:             * @see #getValue(int)
084:             */
085:            public int getLength() {
086:                return mLength;
087:            }
088:
089:            /**
090:             * Look up an attribute's Namespace URI by index.
091:             *
092:             * @param index The attribute index (zero-based).
093:             * @return The Namespace URI, or the empty string if none
094:             *	is available, or null if the index is out of
095:             *	range.
096:             * @see #getLength
097:             */
098:            public String getURI(int index) {
099:                return ((index >= 0) && (index < mLength)) ? (mItems[index << 3])
100:                        : null;
101:            }
102:
103:            /**
104:             * Look up an attribute's local name by index.
105:             *
106:             * @param index The attribute index (zero-based).
107:             * @return The local name, or the empty string if Namespace
108:             *	processing is not being performed, or null
109:             *	if the index is out of range.
110:             * @see #getLength
111:             */
112:            public String getLocalName(int index) {
113:                return ((index >= 0) && (index < mLength)) ? (mItems[(index << 3) + 2])
114:                        : null;
115:            }
116:
117:            /**
118:             * Look up an attribute's XML 1.0 qualified name by index.
119:             *
120:             * @param index The attribute index (zero-based).
121:             * @return The XML 1.0 qualified name, or the empty string
122:             *	if none is available, or null if the index
123:             *	is out of range.
124:             * @see #getLength
125:             */
126:            public String getQName(int index) {
127:                if ((index < 0) || (index >= mLength))
128:                    return null;
129:                return mItems[(index << 3) + 1];
130:            }
131:
132:            /**
133:             * Look up an attribute's type by index.
134:             *
135:             * <p>The attribute type is one of the strings "CDATA", "ID",
136:             * "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES",
137:             * or "NOTATION" (always in upper case).</p>
138:             *
139:             * <p>If the parser has not read a declaration for the attribute,
140:             * or if the parser does not report attribute types, then it must
141:             * return the value "CDATA" as stated in the XML 1.0 Recommentation
142:             * (clause 3.3.3, "Attribute-Value Normalization").</p>
143:             *
144:             * <p>For an enumerated attribute that is not a notation, the
145:             * parser will report the type as "NMTOKEN".</p>
146:             *
147:             * @param index The attribute index (zero-based).
148:             * @return The attribute's type as a string, or null if the
149:             *         index is out of range.
150:             * @see #getLength
151:             */
152:            public String getType(int index) {
153:                return ((index >= 0) && (index < (mItems.length >> 3))) ? (mItems[(index << 3) + 4])
154:                        : null;
155:            }
156:
157:            /**
158:             * Look up an attribute's value by index.
159:             *
160:             * <p>If the attribute value is a list of tokens (IDREFS,
161:             * ENTITIES, or NMTOKENS), the tokens will be concatenated
162:             * into a single string with each token separated by a
163:             * single space.</p>
164:             *
165:             * @param index The attribute index (zero-based).
166:             * @return The attribute's value as a string, or null if the
167:             *         index is out of range.
168:             * @see #getLength
169:             */
170:            public String getValue(int index) {
171:                return ((index >= 0) && (index < mLength)) ? (mItems[(index << 3) + 3])
172:                        : null;
173:            }
174:
175:            /**
176:             * Look up the index of an attribute by Namespace name.
177:             *
178:             * @param uri The Namespace URI, or the empty string if
179:             *	the name has no Namespace URI.
180:             * @param localName The attribute's local name.
181:             * @return The index of the attribute, or -1 if it does not
182:             *	appear in the list.
183:             */
184:            public int getIndex(String uri, String localName) {
185:                char len = mLength;
186:                char idx = 0;
187:                while (idx < len) {
188:                    if ((mItems[idx << 3]).equals(uri)
189:                            && mItems[(idx << 3) + 2].equals(localName))
190:                        return idx;
191:                    idx++;
192:                }
193:                return -1;
194:            }
195:
196:            /**
197:             * Look up the index of an attribute by XML 1.0 qualified name.
198:             *
199:             * @param qName The qualified (prefixed) name.
200:             * @return The index of the attribute, or -1 if it does not
201:             *	appear in the list.
202:             */
203:            public int getIndex(String qName) {
204:                char len = mLength;
205:                char idx = 0;
206:                while (idx < len) {
207:                    if (getQName(idx).equals(qName))
208:                        return idx;
209:                    idx++;
210:                }
211:                return -1;
212:            }
213:
214:            /**
215:             * Look up an attribute's type by Namespace name.
216:             *
217:             * <p>See {@link #getType(int) getType(int)} for a description
218:             * of the possible types.</p>
219:             *
220:             * @param uri The Namespace URI, or the empty String if the
221:             *	name has no Namespace URI.
222:             * @param localName The local name of the attribute.
223:             * @return The attribute type as a string, or null if the
224:             *	attribute is not in the list or if Namespace
225:             *	processing is not being performed.
226:             */
227:            public String getType(String uri, String localName) {
228:                int idx = getIndex(uri, localName);
229:                return (idx >= 0) ? (mItems[(idx << 3) + 4]) : null;
230:            }
231:
232:            /**
233:             * Look up an attribute's type by XML 1.0 qualified name.
234:             *
235:             * <p>See {@link #getType(int) getType(int)} for a description
236:             * of the possible types.</p>
237:             *
238:             * @param qName The XML 1.0 qualified name.
239:             * @return The attribute type as a string, or null if the
240:             *	attribute is not in the list or if qualified names
241:             *	are not available.
242:             */
243:            public String getType(String qName) {
244:                int idx = getIndex(qName);
245:                return (idx >= 0) ? (mItems[(idx << 3) + 4]) : null;
246:            }
247:
248:            /**
249:             * Look up an attribute's value by Namespace name.
250:             *
251:             * <p>See {@link #getValue(int) getValue(int)} for a description
252:             * of the possible values.</p>
253:             *
254:             * @param uri The Namespace URI, or the empty String if the
255:             *	name has no Namespace URI.
256:             * @param localName The local name of the attribute.
257:             * @return The attribute value as a string, or null if the
258:             *	attribute is not in the list.
259:             */
260:            public String getValue(String uri, String localName) {
261:                int idx = getIndex(uri, localName);
262:                return (idx >= 0) ? (mItems[(idx << 3) + 3]) : null;
263:            }
264:
265:            /**
266:             * Look up an attribute's value by XML 1.0 qualified name.
267:             *
268:             * <p>See {@link #getValue(int) getValue(int)} for a description
269:             * of the possible values.</p>
270:             *
271:             * @param qName The XML 1.0 qualified name.
272:             * @return The attribute value as a string, or null if the
273:             *	attribute is not in the list or if qualified names
274:             *	are not available.
275:             */
276:            public String getValue(String qName) {
277:                int idx = getIndex(qName);
278:                return (idx >= 0) ? (mItems[(idx << 3) + 3]) : null;
279:            }
280:        }
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