Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/soql/SOQLEngine.java @ 2042:0a8e0d4345b3 hs20-b05 jdk7-b124
7010068: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - first pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: jcoomes
| author | trims |
|---|---|
| date | Mon, 03 Jan 2011 15:30:05 -0800 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.utilities.soql; | |
| 26 | |
| 27 import java.util.*; | |
| 28 import sun.jvm.hotspot.oops.*; | |
| 29 import sun.jvm.hotspot.memory.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 import sun.jvm.hotspot.utilities.*; | |
| 32 | |
| 33 /** | |
| 34 * This is SOQL (Simple Object Query Language) engine. This | |
| 35 * uses JavaScript engine for the "select" and "where" expression | |
| 36 * parts. | |
| 37 */ | |
| 38 public class SOQLEngine extends JSJavaScriptEngine { | |
| 39 public static synchronized SOQLEngine getEngine() { | |
| 40 if (soleInstance == null) { | |
| 41 soleInstance = new SOQLEngine(); | |
| 42 } | |
| 43 return soleInstance; | |
| 44 } | |
| 45 | |
| 46 /** | |
| 47 Query is of the form | |
| 48 | |
| 49 select <java script code to select> | |
| 50 [ from [instanceof] <class name> [<identifier>] | |
| 51 [ where <java script boolean expression> ] | |
| 52 ] | |
| 53 */ | |
| 54 public synchronized void executeQuery(String query, ObjectVisitor visitor) | |
| 55 throws SOQLException { | |
| 56 debugPrint("query : " + query); | |
| 57 StringTokenizer st = new StringTokenizer(query); | |
| 58 if (st.hasMoreTokens()) { | |
| 59 String first = st.nextToken(); | |
| 60 if (! first.equals("select") ) { | |
| 61 throw new SOQLException("query syntax error: no 'select' clause"); | |
| 62 } | |
| 63 } else { | |
| 64 throw new SOQLException("query syntax error: no 'select' clause"); | |
| 65 } | |
| 66 | |
| 67 int selectStart = query.indexOf("select"); | |
| 68 int fromStart = query.indexOf("from"); | |
| 69 | |
| 70 String selectExpr = null; | |
| 71 String className = null; | |
| 72 boolean isInstanceOf = false; | |
| 73 String whereExpr = null; | |
| 74 String identifier = null; | |
| 75 | |
| 76 if (fromStart != -1) { | |
| 77 selectExpr = query.substring(selectStart + "select".length(), fromStart); | |
| 78 st = new StringTokenizer(query.substring(fromStart + "from".length())); | |
| 79 | |
| 80 if (st.hasMoreTokens()) { | |
| 81 String tmp = st.nextToken(); | |
| 82 if (tmp.equals("instanceof")) { | |
| 83 isInstanceOf = true; | |
| 84 if (! st.hasMoreTokens()) { | |
| 85 throw new SOQLException("no class name after 'instanceof'"); | |
| 86 } | |
| 87 className = st.nextToken(); | |
| 88 } else { | |
| 89 className = tmp; | |
| 90 } | |
| 91 } else { | |
| 92 throw new SOQLException("query syntax error: class name must follow 'from'"); | |
| 93 } | |
| 94 | |
| 95 if (st.hasMoreTokens()) { | |
| 96 identifier = st.nextToken(); | |
| 97 if (identifier.equals("where")) { | |
| 98 throw new SOQLException("query syntax error: identifier should follow class name"); | |
| 99 } | |
| 100 if (st.hasMoreTokens()) { | |
| 101 String tmp = st.nextToken(); | |
| 102 if (! tmp.equals("where")) { | |
| 103 throw new SOQLException("query syntax error: 'where' clause expected after 'from' clause"); | |
| 104 } | |
| 105 int whereEnd = query.lastIndexOf("where") + 5; // "where".length | |
| 106 whereExpr = query.substring(whereEnd); | |
| 107 } | |
| 108 } else { | |
| 109 throw new SOQLException("query syntax error: identifier should follow class name"); | |
| 110 } | |
| 111 } else { // no from clause | |
| 112 selectExpr = query.substring(selectStart + "select".length(), query.length()); | |
| 113 } | |
| 114 | |
| 115 executeQuery(new SOQLQuery(selectExpr, isInstanceOf, className, identifier, whereExpr), visitor); | |
| 116 } | |
| 117 | |
| 118 private void executeQuery(SOQLQuery q, ObjectVisitor visitor) throws SOQLException { | |
| 119 InstanceKlass kls = null; | |
| 120 if (q.className != null) { | |
| 121 kls = SystemDictionaryHelper.findInstanceKlass(q.className); | |
| 122 if (kls == null) { | |
| 123 throw new SOQLException(q.className + " is not found!"); | |
| 124 } | |
| 125 } | |
| 126 | |
| 127 | |
| 128 StringBuffer buf = new StringBuffer(); | |
| 129 buf.append("function result("); | |
| 130 if (q.identifier != null) { | |
| 131 buf.append(q.identifier); | |
| 132 } | |
| 133 buf.append(") { return "); | |
| 134 buf.append(q.selectExpr.replace('\n', ' ')); | |
| 135 buf.append("; }"); | |
| 136 | |
| 137 String selectCode = buf.toString(); | |
| 138 debugPrint(selectCode); | |
| 139 String whereCode = null; | |
| 140 if (q.whereExpr != null) { | |
| 141 buf = new StringBuffer(); | |
| 142 buf.append("function filter("); | |
| 143 buf.append(q.identifier); | |
| 144 buf.append(") { return "); | |
| 145 buf.append(q.whereExpr.replace('\n', ' ')); | |
| 146 buf.append("; }"); | |
| 147 whereCode = buf.toString(); | |
| 148 debugPrint(whereCode); | |
| 149 } else { | |
| 150 whereCode = "filter = null;"; | |
| 151 } | |
| 152 | |
| 153 beginQuery(); | |
| 154 // compile select expression and where condition | |
| 155 evalString(selectCode, "", 1); | |
| 156 evalString(whereCode, "", 1); | |
| 157 | |
| 158 // iterate thru heap, if needed | |
| 159 if (q.className != null) { | |
| 160 try { | |
| 161 iterateOops(kls, visitor, q.isInstanceOf); | |
| 162 } finally { | |
| 163 endQuery(); | |
| 164 } | |
| 165 } else { | |
| 166 // simple "select <expr>" query | |
| 167 try { | |
| 168 Object select = call("result", new Object[] {}); | |
| 169 visitor.visit(select); | |
| 170 } catch (Exception e) { | |
| 171 e.printStackTrace(); | |
| 172 } | |
| 173 } | |
| 174 } | |
| 175 | |
| 176 private void dispatchObject(Oop oop, ObjectVisitor visitor, boolean filterExists) { | |
| 177 JSJavaObject jsObj = factory.newJSJavaObject(oop); | |
| 178 Object[] args = new Object[] { jsObj }; | |
| 179 boolean b = true; | |
| 180 | |
| 181 try { | |
| 182 if (filterExists) { | |
| 183 Object res = call("filter", args); | |
| 184 if (res instanceof Boolean) { | |
| 185 b = ((Boolean)res).booleanValue(); | |
| 186 } else if (res instanceof Number) { | |
| 187 b = ((Number)res).intValue() != 0; | |
| 188 } else { | |
| 189 b = (res != null); | |
| 190 } | |
| 191 } | |
| 192 | |
| 193 if (b) { | |
| 194 Object select = call("result", args); | |
| 195 visitor.visit(select); | |
| 196 } | |
| 197 } catch (Exception e) { | |
| 198 throw new RuntimeException(e); | |
| 199 } | |
| 200 } | |
| 201 | |
| 202 private void iterateOops(final InstanceKlass ik, final ObjectVisitor visitor, | |
| 203 boolean includeSubtypes) { | |
| 204 ObjectHeap oh = VM.getVM().getObjectHeap(); | |
| 205 oh.iterateObjectsOfKlass(new HeapVisitor() { | |
| 206 boolean filterExists; | |
| 207 public void prologue(long usedSize) { | |
| 208 filterExists = getScriptEngine().get("filter") != null; | |
| 209 } | |
| 210 public boolean doObj(Oop obj) { | |
| 211 dispatchObject(obj, visitor, filterExists); | |
| 212 return false; | |
| 213 } | |
| 214 public void epilogue() {} | |
| 215 }, ik, includeSubtypes); | |
| 216 } | |
| 217 | |
| 218 // we create fresh ObjectReader and factory to avoid | |
| 219 // excessive cache across queries. | |
| 220 private void beginQuery() { | |
| 221 objReader = new ObjectReader(); | |
| 222 factory = new JSJavaFactoryImpl(); | |
| 223 } | |
| 224 | |
| 225 // at the end of query we clear object reader cache | |
| 226 // and factory cache | |
| 227 private void endQuery() { | |
| 228 objReader = null; | |
| 229 factory = null; | |
| 230 } | |
| 231 | |
| 232 protected ObjectReader getObjectReader() { | |
| 233 return objReader; | |
| 234 } | |
| 235 | |
| 236 protected JSJavaFactory getJSJavaFactory() { | |
| 237 return factory; | |
| 238 } | |
| 239 | |
| 240 protected boolean isQuitting() { | |
| 241 return false; | |
| 242 } | |
| 243 | |
| 244 protected void quit() { | |
| 245 // do nothing | |
| 246 } | |
| 247 | |
| 248 private static void debugPrint(String msg) { | |
| 249 if (debug) System.out.println(msg); | |
| 250 } | |
| 251 | |
| 252 private static final boolean debug; | |
| 253 static { | |
| 254 debug = System.getProperty("sun.jvm.hotspot.utilities.soql.SOQLEngine.debug") != null; | |
| 255 } | |
| 256 | |
| 257 protected SOQLEngine() { | |
| 258 super(debug); | |
| 259 start(); | |
| 260 } | |
| 261 | |
| 262 private ObjectReader objReader; | |
| 263 private JSJavaFactory factory; | |
| 264 private static SOQLEngine soleInstance; | |
| 265 } |