Source Code Cross Referenced for Mark.java in  » Web-Server » Rimfaxe-Web-Server » com » rimfaxe » webserver » compiler » jsp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Server » Rimfaxe Web Server » com.rimfaxe.webserver.compiler.jsp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * The Apache Software License, Version 1.1
003:         *
004:         * Copyright (c) 1999 The Apache Software Foundation.  All rights 
005:         * reserved.
006:         *
007:         * Redistribution and use in source and binary forms, with or without
008:         * modification, are permitted provided that the following conditions
009:         * are met:
010:         *
011:         * 1. Redistributions of source code must retain the above copyright
012:         *    notice, this list of conditions and the following disclaimer. 
013:         *
014:         * 2. Redistributions in binary form must reproduce the above copyright
015:         *    notice, this list of conditions and the following disclaimer in
016:         *    the documentation and/or other materials provided with the
017:         *    distribution.
018:         *
019:         * 3. The end-user documentation included with the redistribution, if
020:         *    any, must include the following acknowlegement:  
021:         *       "This product includes software developed by the 
022:         *        Apache Software Foundation (http://www.apache.org/)."
023:         *    Alternately, this acknowlegement may appear in the software itself,
024:         *    if and wherever such third-party acknowlegements normally appear.
025:         *
026:         * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
027:         *    Foundation" must not be used to endorse or promote products derived
028:         *    from this software without prior written permission. For written 
029:         *    permission, please contact apache@apache.org.
030:         *
031:         * 5. Products derived from this software may not be called "Apache"
032:         *    nor may "Apache" appear in their names without prior written
033:         *    permission of the Apache Group.
034:         *
035:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
036:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038:         * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039:         * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042:         * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044:         * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045:         * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046:         * SUCH DAMAGE.
047:         * ====================================================================
048:         *
049:         * This software consists of voluntary contributions made by many
050:         * individuals on behalf of the Apache Software Foundation.  For more
051:         * information on the Apache Software Foundation, please see
052:         * <http://www.apache.org/>.
053:         *
054:         */
055:
056:        package com.rimfaxe.webserver.compiler.jsp;
057:
058:        import java.util.Stack;
059:
060:        /**
061:         * Mark represents a point in the JSP input. 
062:         *
063:         * @author Anil K. Vijendran
064:         * @author Lars Andersen
065:         */
066:        public final class Mark {
067:            int cursor, line, col; // position within current stream
068:            int fileid; // fileid of current stream
069:            String fileName; // name of the current file
070:            String baseDir; // directory of file for current stream
071:            char[] stream = null; // current stream
072:            Stack includeStack = null; // stack of stream and stream state of streams
073:            //   that have included current stream
074:            String encoding = null; // encoding of current file
075:            private JspReader reader; // reader that owns this mark 
076:
077:            //   (so we can look up fileid's)
078:
079:            /**
080:             * Keep track of parser before parsing an included file.
081:             * This class keeps track of the parser before we switch to parsing an
082:             * included file. In other words, it's the parser's continuation to be
083:             * reinstalled after the included file parsing is done.
084:             */
085:            class IncludeState {
086:                int cursor, line, col;
087:                int fileid;
088:                String fileName;
089:                String baseDir;
090:                String encoding;
091:                char[] stream = null;
092:
093:                IncludeState(int inCursor, int inLine, int inCol, int inFileid,
094:                        String name, String inBaseDir, String inEncoding,
095:                        char[] inStream) {
096:                    cursor = inCursor;
097:                    line = inLine;
098:                    col = inCol;
099:                    fileid = inFileid;
100:                    fileName = name;
101:                    baseDir = inBaseDir;
102:                    encoding = inEncoding;
103:                    stream = inStream;
104:                }
105:            }
106:
107:            /**
108:             * Creates a new mark
109:             * @param inReader JspReader this mark belongs to
110:             * @param inStream current stream for this mark
111:             * @param inFileid id of requested jsp file
112:             * @param inEncoding encoding of current file
113:             * @param inBaseDir base directory of requested jsp file
114:             */
115:            Mark(JspReader reader, char[] inStream, int fileid, String name,
116:                    String inBaseDir, String inEncoding) {
117:                this .reader = reader;
118:                this .stream = inStream;
119:                this .cursor = this .line = this .col = 0;
120:                this .fileid = fileid;
121:                this .fileName = name;
122:                this .baseDir = inBaseDir;
123:                this .encoding = inEncoding;
124:                this .includeStack = new Stack();
125:            }
126:
127:            Mark(Mark other) {
128:                this .reader = other.reader;
129:                this .stream = other.stream;
130:                this .fileid = other.fileid;
131:                this .fileName = other.fileName;
132:                this .cursor = other.cursor;
133:                this .line = other.line;
134:                this .col = other.col;
135:                this .baseDir = other.baseDir;
136:                this .encoding = other.encoding;
137:
138:                // clone includeStack without cloning contents
139:                includeStack = new Stack();
140:                for (int i = 0; i < other.includeStack.size(); i++) {
141:                    includeStack.addElement(other.includeStack.elementAt(i));
142:                }
143:            }
144:
145:            Mark(String filename, int line, int col) {
146:                //System.out.println("MARK: filename is: " + filename);
147:                this .reader = null;
148:                this .stream = null;
149:                this .cursor = 0;
150:                this .line = line;
151:                this .col = col;
152:                this .fileid = -1;
153:                this .fileName = filename;
154:                this .baseDir = "le-basedir";
155:                this .encoding = "le-endocing";
156:                this .includeStack = null;
157:            }
158:
159:            /** Sets this mark's state to a new stream.
160:             * It will store the current stream in it's includeStack.
161:             * @param inStream new stream for mark
162:             * @param inFileid id of new file from which stream comes from
163:             * @param inBaseDir directory of file
164:             * @param inEncoding encoding of new file
165:             */
166:            public void pushStream(char[] inStream, int inFileid, String name,
167:                    String inBaseDir, String inEncoding) {
168:
169:                // store current state in stack
170:                includeStack.push(new IncludeState(cursor, line, col, fileid,
171:                        fileName, baseDir, encoding, stream));
172:
173:                // set new variables
174:                cursor = 0;
175:                line = 0;
176:                col = 0;
177:                fileid = inFileid;
178:                fileName = name;
179:                baseDir = inBaseDir;
180:                encoding = inEncoding;
181:                stream = inStream;
182:            }
183:
184:            /** Restores this mark's state to a previously stored stream.
185:             */
186:            public boolean popStream() {
187:                // make sure we have something to pop
188:                if (includeStack.size() <= 0)
189:                    return false;
190:
191:                // get previous state in stack
192:                IncludeState state = (IncludeState) includeStack.pop();
193:
194:                // set new variables
195:                cursor = state.cursor;
196:                line = state.line;
197:                col = state.col;
198:                fileid = state.fileid;
199:                fileName = state.fileName;
200:                baseDir = state.baseDir;
201:                stream = state.stream;
202:                return true;
203:            }
204:
205:            // -------------------- Locator interface --------------------
206:
207:            public int getLineNumber() {
208:                return line;
209:            }
210:
211:            public int getColumnNumber() {
212:                return col;
213:            }
214:
215:            public String getSystemId() {
216:                return getFile();
217:            }
218:
219:            public String getPublicId() {
220:                return null;
221:            }
222:
223:            public String toString() {
224:                return getFile() + "(" + line + "," + col + ")";
225:            }
226:
227:            public String getFile() {
228:                return this .fileName;
229:            }
230:
231:            public String toShortString() {
232:                return "(" + line + "," + col + ")";
233:            }
234:
235:            public boolean equals(Object other) {
236:                if (other instanceof  Mark) {
237:                    Mark m = (Mark) other;
238:                    return this .reader == m.reader && this .fileid == m.fileid
239:                            && this .cursor == m.cursor && this .line == m.line
240:                            && this .col == m.col;
241:                }
242:                return false;
243:            }
244:        }
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