Source Code Cross Referenced for XML10ContentChecker.java in  » XML » XPath-Saxon » net » sf » saxon » event » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » XPath Saxon » net.sf.saxon.event 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package net.sf.saxon.event;
002:
003:        import net.sf.saxon.trans.XPathException;
004:        import net.sf.saxon.trans.DynamicError;
005:        import net.sf.saxon.om.NameChecker;
006:        import net.sf.saxon.om.Name10Checker;
007:        import net.sf.saxon.om.NamePool;
008:        import net.sf.saxon.om.XMLChar;
009:        import net.sf.saxon.Err;
010:        import net.sf.saxon.expr.ExpressionLocation;
011:        import net.sf.saxon.sort.IntHashSet;
012:
013:        /**
014:         * This class is used on the serialization pipeline to check that the document conforms
015:         * to XML 1.0 rules. It is placed on the pipeline only when the configuration permits
016:         * XML 1.1 constructs, but the particular output document is being serialized as XML 1.0
017:         */
018:
019:        public class XML10ContentChecker extends ProxyReceiver {
020:
021:            private NameChecker checker = Name10Checker.getInstance();
022:            private NamePool pool;
023:            private IntHashSet cache = new IntHashSet(100);
024:
025:            public void setPipelineConfiguration(PipelineConfiguration pipe) {
026:                pool = pipe.getConfiguration().getNamePool();
027:                super .setPipelineConfiguration(pipe);
028:            }
029:
030:            /**
031:             * Notify the start of an element
032:             *
033:             * @param nameCode   integer code identifying the name of the element within the name pool.
034:             * @param typeCode   integer code identifying the element's type within the name pool.
035:             * @param properties properties of the element node
036:             */
037:
038:            public void startElement(int nameCode, int typeCode,
039:                    int locationId, int properties) throws XPathException {
040:                if (!cache.contains(nameCode)) {
041:                    if (!checker.isValidNCName(pool.getLocalName(nameCode))) {
042:                        DynamicError err = new DynamicError(
043:                                "Invalid XML 1.0 element name "
044:                                        + Err.wrap(pool.getLocalName(nameCode),
045:                                                Err.ELEMENT));
046:                        err.setErrorCode("SERE0005");
047:                        err.setLocator(new ExpressionLocation(
048:                                getPipelineConfiguration()
049:                                        .getLocationProvider(), locationId));
050:                        throw err;
051:                    }
052:                    cache.add(nameCode);
053:                }
054:                nextReceiver.startElement(nameCode, typeCode, locationId,
055:                        properties);
056:            }
057:
058:            /**
059:             * Notify an attribute. Attributes are notified after the startElement event, and before any
060:             * children. Namespaces and attributes may be intermingled.
061:             *
062:             * @param nameCode   The name of the attribute, as held in the name pool
063:             * @param typeCode   The type of the attribute, as held in the name pool
064:             * @param properties Bit significant value. The following bits are defined:
065:             *                   <dd>DISABLE_ESCAPING</dd>    <dt>Disable escaping for this attribute</dt>
066:             *                   <dd>NO_SPECIAL_CHARACTERS</dd>      <dt>Attribute value contains no special characters</dt>
067:             * @throws IllegalStateException: attempt to output an attribute when there is no open element
068:             *                                start tag
069:             */
070:
071:            public void attribute(int nameCode, int typeCode,
072:                    CharSequence value, int locationId, int properties)
073:                    throws XPathException {
074:                if (!cache.contains(nameCode)) {
075:                    if (!checker.isValidNCName(pool.getLocalName(nameCode))) {
076:                        DynamicError err = new DynamicError(
077:                                "Invalid XML 1.0 attribute name "
078:                                        + Err.wrap(pool.getLocalName(nameCode),
079:                                                Err.ATTRIBUTE));
080:                        err.setErrorCode("SERE0005");
081:                        err.setLocator(new ExpressionLocation(
082:                                getPipelineConfiguration()
083:                                        .getLocationProvider(), locationId));
084:                        throw err;
085:                    }
086:                    cache.add(nameCode);
087:                }
088:                checkString(value, locationId);
089:                nextReceiver.attribute(nameCode, typeCode, value, locationId,
090:                        properties);
091:            }
092:
093:            /**
094:             * Character data
095:             */
096:
097:            public void characters(CharSequence chars, int locationId,
098:                    int properties) throws XPathException {
099:                checkString(chars, locationId);
100:                nextReceiver.characters(chars, locationId, properties);
101:            }
102:
103:            /**
104:             * Output a comment
105:             */
106:
107:            public void comment(CharSequence chars, int locationId,
108:                    int properties) throws XPathException {
109:                checkString(chars, locationId);
110:                nextReceiver.comment(chars, locationId, properties);
111:            }
112:
113:            /**
114:             * Processing Instruction
115:             */
116:
117:            public void processingInstruction(String target, CharSequence data,
118:                    int locationId, int properties) throws XPathException {
119:                if (!checker.isValidNCName(target)) {
120:                    DynamicError err = new DynamicError(
121:                            "Invalid XML 1.0 processing instruction name "
122:                                    + Err.wrap(target));
123:                    err.setErrorCode("SERE0005");
124:                    err.setLocator(new ExpressionLocation(
125:                            getPipelineConfiguration().getLocationProvider(),
126:                            locationId));
127:                    throw err;
128:                }
129:                checkString(data, locationId);
130:                nextReceiver.processingInstruction(target, data, locationId,
131:                        properties);
132:            }
133:
134:            /**
135:             * Check that a string consists of valid XML 1.0 characters (UTF-16 encoded)
136:             */
137:
138:            private void checkString(CharSequence in, int locationId)
139:                    throws XPathException {
140:                final int len = in.length();
141:                for (int c = 0; c < len; c++) {
142:                    int ch32 = in.charAt(c);
143:                    if (XMLChar.isHighSurrogate(ch32)) {
144:                        char low = in.charAt(c++);
145:                        ch32 = XMLChar.supplemental((char) ch32, low);
146:                    }
147:                    if (!XMLChar.isValid(ch32)) {
148:                        DynamicError err = new DynamicError(
149:                                "The result tree contains a character not allowed by XML 1.0 (hex "
150:                                        + Integer.toHexString(ch32) + ')');
151:                        err.setErrorCode("XTDE1180");
152:                        err.setLocator(new ExpressionLocation(
153:                                getPipelineConfiguration()
154:                                        .getLocationProvider(), locationId));
155:                        throw err;
156:                    }
157:                }
158:            }
159:
160:        }
161:
162:        //
163:        // The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
164:        // you may not use this file except in compliance with the License. You may obtain a copy of the
165:        // License at http://www.mozilla.org/MPL/
166:        //
167:        // Software distributed under the License is distributed on an "AS IS" basis,
168:        // WITHOUT WARRANTY OF ANY KIND, either express or implied.
169:        // See the License for the specific language governing rights and limitations under the License.
170:        //
171:        // The Original Code is: all this file.
172:        //
173:        // The Initial Developer of the Original Code is Michael H. Kay. The detectEncoding() method includes
174:        // code fragments taken from the AElfred XML Parser developed by David Megginson.
175:        //
176:        // Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
177:        //
178:        // Contributor(s): none.
179:        //
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