1 /* 2 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package pseudoScriptEngineCompilable; 27 28 import javax.script.Bindings; 29 import javax.script.ScriptContext; 30 import javax.script.ScriptEngine; 31 import javax.script.ScriptEngineFactory; 32 import javax.script.ScriptException; 33 34 import javax.script.Compilable; 35 import javax.script.CompiledScript; 36 37 import javax.script.AbstractScriptEngine; 38 import javax.script.SimpleScriptContext; 39 import javax.script.SimpleBindings; 40 41 import java.util.ArrayList; 42 import java.util.Set; 43 import java.util.TreeMap; 44 import java.io.Reader; 45 import java.io.BufferedReader; 46 import java.io.IOException; 47 48 import java.time.Instant; 49 50 public class RgfPseudoScriptEngineCompilable extends AbstractScriptEngine implements Compilable { 51 static final boolean bDebug = false; // true; 52 53 /** Allows to log and access the ScriptEngine instances with their evalDataList. */ 54 static final ArrayList<RgfPseudoScriptEngineCompilable> enginesUsed = new ArrayList(); 55 public static ArrayList<RgfPseudoScriptEngineCompilable> getEnginesUsed() { 56 return enginesUsed; 57 } 58 59 public RgfPseudoScriptEngineCompilable() { 60 enginesUsed.add(this); 61 } 62 63 public ScriptEngineFactory getFactory() { 64 return new RgfPseudoScriptEngineCompilableFactory(); 65 } 66 67 /** ArrayList of eval() (invocation) information. */ 68 final ArrayList<InvocationInfos> invocationList = new ArrayList(); 69 70 /** 71 * Returns ArrayList of eval() (invocation) information. 72 * @return invocationList 73 */ 74 public ArrayList<InvocationInfos> getInvocationList() { 75 return invocationList; 76 } 77 78 public Bindings createBindings() { 79 return new SimpleBindings(); 80 } 81 82 public Object eval(Reader reader, ScriptContext context) { 83 if (bDebug) System.err.println("[debug: " + this + ".eval(Reader,ScriptContext), ScriptContext=" + context + "]"); 84 85 return eval(readReader(reader), context); 86 } 87 88 public Object eval(String script, ScriptContext context) { 89 if (bDebug) System.err.print("[debug: " + this + ".eval(String,ScriptContext), ScriptContext=" + context + "]"); 90 91 // create copies of the Bindings for later inspection as they may 92 // get reused and changed on each eval() invocation 93 TreeMap<Integer,TreeMap> bindings = new TreeMap(); 94 for (Integer scope : context.getScopes()) { 95 Bindings binding = context.getBindings(scope); 96 bindings.put(scope, binding == null ? new TreeMap<String,Object>() : new TreeMap<String,Object>(binding)); 97 } 98 invocationList.add(new InvocationInfos(script,context)); 99 if (bDebug) System.err.println(" | invocationList.size()=" + invocationList.size()); 100 return invocationList; 101 } 102 103 public CompiledScript compile(Reader script) throws ScriptException { 104 return compile (readReader(script)); 105 } 106 107 public CompiledScript compile(String script) throws ScriptException { 108 if (script.indexOf("FAIL COMPILATION") != -1) { 109 throw new ScriptException("test script contains FAIL COMPILATION"); 110 } 111 112 String code = "RgfPseudoCompiledScript=[" + script + "]"; 113 RgfPseudoCompiledScript rpcs = new RgfPseudoCompiledScript(code, this); 114 return rpcs; 115 } 116 117 String readReader(Reader reader) { 118 if (reader == null) { 119 return ""; 120 } 121 122 BufferedReader bufferedReader = new BufferedReader(reader); 123 StringBuilder sb = new StringBuilder(); 124 // caters for possible IOException in read() and close() 125 try { 126 try { 127 char[] charBuffer = new char[1024]; 128 int r = 0; 129 130 while ((r = bufferedReader.read(charBuffer)) != -1) { 131 sb.append(charBuffer, 0, r); 132 } 133 } finally { 134 bufferedReader.close(); 135 } 136 } catch (IOException ioe) { 137 throw new RuntimeException(ioe.getMessage(), ioe); 138 } 139 return sb.toString(); 140 } 141 }