Source Code Cross Referenced for PrintUtil.java in  » RSS-RDF » Jena-2.5.5 » com » hp » hpl » jena » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » RSS RDF » Jena 2.5.5 » com.hp.hpl.jena.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /******************************************************************
002:         * File:        PrintUtil.java
003:         * Created by:  Dave Reynolds
004:         * Created on:  29-Mar-03
005:         * 
006:         * (c) Copyright 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
007:         * [See end of file]
008:         * $Id: PrintUtil.java,v 1.22 2008/01/02 12:07:44 andy_seaborne Exp $
009:         *****************************************************************/package com.hp.hpl.jena.util;
010:
011:        import java.util.*;
012:        import java.io.*;
013:        import com.hp.hpl.jena.vocabulary.*;
014:        import com.hp.hpl.jena.datatypes.xsd.XSDDatatype;
015:        import com.hp.hpl.jena.graph.*;
016:        import com.hp.hpl.jena.rdf.model.*;
017:        import com.hp.hpl.jena.reasoner.TriplePattern;
018:        import com.hp.hpl.jena.shared.PrefixMapping;
019:
020:        /**
021:         * A collection of small utilites for pretty printing nodes, triples
022:         * and associated things. The core functionality here is a static
023:         * prefix map which is preloaded with known prefixes.
024:         * 
025:         * <p>updated by Chris March 2004 to use a PrefixMapping rather than the
026:         * specialised tables.
027:         * 
028:         * @author <a href="mailto:der@hplb.hpl.hp.com">Dave Reynolds</a>
029:         * @version $Revision: 1.22 $ on $Date: 2008/01/02 12:07:44 $
030:         */
031:        public class PrintUtil {
032:
033:            protected static PrefixMapping prefixMapping = PrefixMapping.Factory
034:                    .create();
035:
036:            /** Default built in eg namespace used in testing */
037:            public static final String egNS = "urn:x-hp:eg/";
038:
039:            static {
040:                init();
041:            }
042:
043:            /**
044:             * Load built in prefixes.
045:             */
046:            public static void init() {
047:                registerPrefix("rdf", RDF.getURI());
048:                registerPrefix("rdfs", RDFS.getURI());
049:                registerPrefix("drdfs",
050:                        "urn:x-hp-direct-predicate:http_//www.w3.org/2000/01/rdf-schema#");
051:                registerPrefix("owl", OWL.getURI());
052:                registerPrefix("daml", DAML_OIL.NAMESPACE_DAML.getURI());
053:                registerPrefix("jr", ReasonerVocabulary.getJenaReasonerNS());
054:                registerPrefix("rb", ReasonerVocabulary.getRBNamespace());
055:                registerPrefix("eg", egNS);
056:                registerPrefix("xsd", XSDDatatype.XSD + "#");
057:            }
058:
059:            /**
060:             * Register a new prefix/namespace mapping which will be used to shorten
061:             * the print strings for resources in known namespaces.
062:             */
063:            public static void registerPrefix(String prefix, String namespace) {
064:                prefixMapping.setNsPrefix(prefix, namespace);
065:            }
066:
067:            /**
068:             * Register a set of new prefix/namespace mapping which will be used to shorten
069:             * the print strings for resources in known namespaces.
070:             */
071:            public static void registerPrefixMap(Map map) {
072:                prefixMapping.setNsPrefixes(map);
073:            }
074:
075:            /**
076:             * Remove a registered prefix from the table of known short forms
077:             */
078:            public static void removePrefix(String prefix) {
079:                prefixMapping.removeNsPrefix(prefix);
080:            }
081:
082:            /**
083:             * Remove a set of prefix mappings from the table of known short forms
084:             */
085:            public static void removePrefixMap(Map map) {
086:                for (Iterator i = map.keySet().iterator(); i.hasNext();) {
087:                    prefixMapping.removeNsPrefix((String) i.next());
088:                }
089:            }
090:
091:            /**
092:             * Return a simplified print string for a Node. 
093:             */
094:            public static String print(Node node) {
095:                if (node instanceof  Node_URI) {
096:                    return node.toString(prefixMapping);
097:                } else if (node instanceof  Node_Literal) {
098:                    String lf = node.getLiteralLexicalForm();
099:                    return "'"
100:                            + lf
101:                            + "'"
102:                            + (node.getLiteralDatatype() == null ? "" : "^^"
103:                                    + node.getLiteralDatatypeURI());
104:                } else if (node instanceof  Node_ANY) {
105:                    return "*";
106:                }
107:                if (node == null) {
108:                    return "null";
109:                }
110:                return node.toString();
111:            }
112:
113:            /**
114:             * Return a simplified print string for an RDFNode. 
115:             */
116:            public static String print(RDFNode node) {
117:                if (node == null)
118:                    return "null";
119:                return print(node.asNode());
120:            }
121:
122:            /**
123:             * Return a simplified print string for a Triple
124:             */
125:            public static String print(Triple triple) {
126:                if (triple == null)
127:                    return "(null)";
128:                return "(" + print(triple.getSubject()) + " "
129:                        + print(triple.getPredicate()) + " "
130:                        + print(triple.getObject()) + ")";
131:            }
132:
133:            /**
134:             * Return a simplified print string for a TriplePattern
135:             */
136:            public static String print(TriplePattern triple) {
137:                if (triple == null)
138:                    return "(null)";
139:                return "(" + print(triple.getSubject()) + " "
140:                        + print(triple.getPredicate()) + " "
141:                        + print(triple.getObject()) + ")";
142:            }
143:
144:            /**
145:             * Return a simplified print string for a statment
146:             */
147:            public static String print(Statement stmt) {
148:                if (stmt == null)
149:                    return "(null)";
150:                return print(stmt.asTriple());
151:            }
152:
153:            /**
154:             * Default print which just uses tostring
155:             */
156:            public static String print(Object obj) {
157:                if (obj == null)
158:                    return "null";
159:                if (obj instanceof  Triple) {
160:                    return print((Triple) obj);
161:                } else if (obj instanceof  TriplePattern) {
162:                    return print((TriplePattern) obj);
163:                } else if (obj instanceof  Node) {
164:                    return print((Node) obj);
165:                } else if (obj instanceof  RDFNode) {
166:                    return print((RDFNode) obj);
167:                } else if (obj instanceof  Statement) {
168:                    return print((Statement) obj);
169:                } else {
170:                    return obj.toString();
171:                }
172:            }
173:
174:            /**
175:             * Expand qnames to URIs. If the given URI appears
176:             * to start with one of the registered prefixes then
177:             * expand the prefix, otherwise return the original URI
178:             */
179:            public static String expandQname(String uri) {
180:                return prefixMapping.expandPrefix(uri);
181:            }
182:
183:            /**
184:             * Print an n-space indent to the given output stream
185:             */
186:            public static void printIndent(PrintWriter out, int indent) {
187:                StringBuffer spaces = new StringBuffer();
188:                for (int i = 0; i < indent; i++)
189:                    spaces.append(" ");
190:                out.print(spaces.toString());
191:            }
192:
193:            /**
194:             * Print all the Triple values from a find iterator.
195:             */
196:            public static void printOut(Iterator it) {
197:                while (it.hasNext()) {
198:                    System.out.println("   " + print(it.next()));
199:                }
200:            }
201:        }
202:
203:        /*
204:         (c) Copyright 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
205:         All rights reserved.
206:
207:         Redistribution and use in source and binary forms, with or without
208:         modification, are permitted provided that the following conditions
209:         are met:
210:
211:         1. Redistributions of source code must retain the above copyright
212:         notice, this list of conditions and the following disclaimer.
213:
214:         2. Redistributions in binary form must reproduce the above copyright
215:         notice, this list of conditions and the following disclaimer in the
216:         documentation and/or other materials provided with the distribution.
217:
218:         3. The name of the author may not be used to endorse or promote products
219:         derived from this software without specific prior written permission.
220:
221:         THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
222:         IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
223:         OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
224:         IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
225:         INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
226:         NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
227:         DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
228:         THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
229:         (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
230:         THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
231:         */
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