Source Code Cross Referenced for DocumentHandler.java in  » IDE-Netbeans » visualweb.api.designer » org » xml » sax » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Netbeans » visualweb.api.designer » org.xml.sax 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // SAX document handler.
002:        // No warranty; no copyright -- use this as you will.
003:        // $Id$
004:
005:        package org.xml.sax;
006:
007:        /**
008:         * Receive notification of general document events.
009:         *
010:         * <blockquote>
011:         * <em>This module, both source code and documentation, is in the
012:         * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
013:         * </blockquote>
014:         *
015:         * <p>This was the main event-handling interface for SAX1; in
016:         * SAX2, it has been replaced by {@link org.xml.sax.ContentHandler
017:         * ContentHandler}, which provides Namespace support and reporting
018:         * of skipped entities.  This interface is included in SAX2 only
019:         * to support legacy SAX1 applications.</p>
020:         *
021:         * <p>The order of events in this interface is very important, and
022:         * mirrors the order of information in the document itself.  For
023:         * example, all of an element's content (character data, processing
024:         * instructions, and/or subelements) will appear, in order, between
025:         * the startElement event and the corresponding endElement event.</p>
026:         *
027:         * <p>Application writers who do not want to implement the entire
028:         * interface can derive a class from HandlerBase, which implements
029:         * the default functionality; parser writers can instantiate
030:         * HandlerBase to obtain a default handler.  The application can find
031:         * the location of any document event using the Locator interface
032:         * supplied by the Parser through the setDocumentLocator method.</p>
033:         *
034:         * @deprecated This interface has been replaced by the SAX2
035:         *             {@link org.xml.sax.ContentHandler ContentHandler}
036:         *             interface, which includes Namespace support.
037:         * @since SAX 1.0
038:         * @author David Megginson, 
039:         *         <a href="mailto:sax@megginson.com">sax@megginson.com</a>
040:         * @version 2.0
041:         * @see org.xml.sax.Parser#setDocumentHandler
042:         * @see org.xml.sax.Locator
043:         * @see org.xml.sax.HandlerBase
044:         */
045:        public interface DocumentHandler {
046:
047:            /**
048:             * Receive an object for locating the origin of SAX document events.
049:             *
050:             * <p>SAX parsers are strongly encouraged (though not absolutely
051:             * required) to supply a locator: if it does so, it must supply
052:             * the locator to the application by invoking this method before
053:             * invoking any of the other methods in the DocumentHandler
054:             * interface.</p>
055:             *
056:             * <p>The locator allows the application to determine the end
057:             * position of any document-related event, even if the parser is
058:             * not reporting an error.  Typically, the application will
059:             * use this information for reporting its own errors (such as
060:             * character content that does not match an application's
061:             * business rules).  The information returned by the locator
062:             * is probably not sufficient for use with a search engine.</p>
063:             *
064:             * <p>Note that the locator will return correct information only
065:             * during the invocation of the events in this interface.  The
066:             * application should not attempt to use it at any other time.</p>
067:             *
068:             * @param locator An object that can return the location of
069:             *                any SAX document event.
070:             * @see org.xml.sax.Locator
071:             */
072:            public abstract void setDocumentLocator(Locator locator);
073:
074:            /**
075:             * Receive notification of the beginning of a document.
076:             *
077:             * <p>The SAX parser will invoke this method only once, before any
078:             * other methods in this interface or in DTDHandler (except for
079:             * setDocumentLocator).</p>
080:             *
081:             * @exception org.xml.sax.SAXException Any SAX exception, possibly
082:             *            wrapping another exception.
083:             */
084:            public abstract void startDocument() throws SAXException;
085:
086:            /**
087:             * Receive notification of the end of a document.
088:             *
089:             * <p>The SAX parser will invoke this method only once, and it will
090:             * be the last method invoked during the parse.  The parser shall
091:             * not invoke this method until it has either abandoned parsing
092:             * (because of an unrecoverable error) or reached the end of
093:             * input.</p>
094:             *
095:             * @exception org.xml.sax.SAXException Any SAX exception, possibly
096:             *            wrapping another exception.
097:             */
098:            public abstract void endDocument() throws SAXException;
099:
100:            /**
101:             * Receive notification of the beginning of an element.
102:             *
103:             * <p>The Parser will invoke this method at the beginning of every
104:             * element in the XML document; there will be a corresponding
105:             * endElement() event for every startElement() event (even when the
106:             * element is empty). All of the element's content will be
107:             * reported, in order, before the corresponding endElement()
108:             * event.</p>
109:             *
110:             * <p>If the element name has a namespace prefix, the prefix will
111:             * still be attached.  Note that the attribute list provided will
112:             * contain only attributes with explicit values (specified or
113:             * defaulted): #IMPLIED attributes will be omitted.</p>
114:             *
115:             * @param name The element type name.
116:             * @param atts The attributes attached to the element, if any.
117:             * @exception org.xml.sax.SAXException Any SAX exception, possibly
118:             *            wrapping another exception.
119:             * @see #endElement
120:             * @see org.xml.sax.AttributeList 
121:             */
122:            public abstract void startElement(String name, AttributeList atts)
123:                    throws SAXException;
124:
125:            /**
126:             * Receive notification of the end of an element.
127:             *
128:             * <p>The SAX parser will invoke this method at the end of every
129:             * element in the XML document; there will be a corresponding
130:             * startElement() event for every endElement() event (even when the
131:             * element is empty).</p>
132:             *
133:             * <p>If the element name has a namespace prefix, the prefix will
134:             * still be attached to the name.</p>
135:             *
136:             * @param name The element type name
137:             * @exception org.xml.sax.SAXException Any SAX exception, possibly
138:             *            wrapping another exception.
139:             */
140:            public abstract void endElement(String name) throws SAXException;
141:
142:            /**
143:             * Receive notification of character data.
144:             *
145:             * <p>The Parser will call this method to report each chunk of
146:             * character data.  SAX parsers may return all contiguous character
147:             * data in a single chunk, or they may split it into several
148:             * chunks; however, all of the characters in any single event
149:             * must come from the same external entity, so that the Locator
150:             * provides useful information.</p>
151:             *
152:             * <p>The application must not attempt to read from the array
153:             * outside of the specified range.</p>
154:             *
155:             * <p>Note that some parsers will report whitespace using the
156:             * ignorableWhitespace() method rather than this one (validating
157:             * parsers must do so).</p>
158:             *
159:             * @param ch The characters from the XML document.
160:             * @param start The start position in the array.
161:             * @param length The number of characters to read from the array.
162:             * @exception org.xml.sax.SAXException Any SAX exception, possibly
163:             *            wrapping another exception.
164:             * @see #ignorableWhitespace 
165:             * @see org.xml.sax.Locator
166:             */
167:            public abstract void characters(char ch[], int start, int length)
168:                    throws SAXException;
169:
170:            /**
171:             * Receive notification of ignorable whitespace in element content.
172:             *
173:             * <p>Validating Parsers must use this method to report each chunk
174:             * of ignorable whitespace (see the W3C XML 1.0 recommendation,
175:             * section 2.10): non-validating parsers may also use this method
176:             * if they are capable of parsing and using content models.</p>
177:             *
178:             * <p>SAX parsers may return all contiguous whitespace in a single
179:             * chunk, or they may split it into several chunks; however, all of
180:             * the characters in any single event must come from the same
181:             * external entity, so that the Locator provides useful
182:             * information.</p>
183:             *
184:             * <p>The application must not attempt to read from the array
185:             * outside of the specified range.</p>
186:             *
187:             * @param ch The characters from the XML document.
188:             * @param start The start position in the array.
189:             * @param length The number of characters to read from the array.
190:             * @exception org.xml.sax.SAXException Any SAX exception, possibly
191:             *            wrapping another exception.
192:             * @see #characters
193:             */
194:            public abstract void ignorableWhitespace(char ch[], int start,
195:                    int length) throws SAXException;
196:
197:            /**
198:             * Receive notification of a processing instruction.
199:             *
200:             * <p>The Parser will invoke this method once for each processing
201:             * instruction found: note that processing instructions may occur
202:             * before or after the main document element.</p>
203:             *
204:             * <p>A SAX parser should never report an XML declaration (XML 1.0,
205:             * section 2.8) or a text declaration (XML 1.0, section 4.3.1)
206:             * using this method.</p>
207:             *
208:             * @param target The processing instruction target.
209:             * @param data The processing instruction data, or null if
210:             *        none was supplied.
211:             * @exception org.xml.sax.SAXException Any SAX exception, possibly
212:             *            wrapping another exception.
213:             */
214:            public abstract void processingInstruction(String target,
215:                    String data) throws SAXException;
216:
217:        }
218:
219:        // end of DocumentHandler.java
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