1 /* 2 * Copyright (c) 2010-2014, 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 package jdk.nashorn.internal.runtime; 26 27 import java.io.IOException; 28 import java.io.Serializable; 29 import java.util.Arrays; 30 import java.util.Map; 31 32 /** 33 * Interface for persistent caching of compiled scripts. 34 */ 35 public interface CodeCache { 36 37 /** 38 * Return a compiled script from the cache, or null if it isn't found. 39 * 40 * @param source the source 41 * @return the compiled script or null 42 * @throws IOException 43 * @throws ClassNotFoundException 44 */ 45 CachedScript getScript(Source source) throws IOException, ClassNotFoundException; 46 47 /** 48 * Store a compiled script in the cache. 49 * 50 * @param source the source 51 * @param mainClassName the main class name 52 * @param classBytes a map of class bytes 53 * @param constants the constants array 54 * @throws IOException 55 */ 56 void putScript(Source source, String mainClassName, Map<String, byte[]> classBytes, Object[] constants) throws IOException; 57 58 /** 59 * Class representing a compiled script. 60 */ 61 public static class CachedScript implements Serializable { 62 63 /** Main class name. */ 64 private final String mainClassName; 65 66 /** Map of class names to class bytes. */ 67 private final Map<String, byte[]> classBytes; 68 69 /** Constants array. */ 70 private final Object[] constants; 71 72 /** The source */ 73 private transient Source source; 74 75 private static final long serialVersionUID = 2346867899194682619L; 76 77 /** 78 * Constructor. 79 * 80 * @param mainClassName main class name 81 * @param classBytes map of class names to class bytes 82 * @param constants constants array 83 */ 84 CachedScript(final Source source, final String mainClassName, final Map<String, byte[]> classBytes, final Object[] constants) { 85 this.source = source; 86 this.mainClassName = mainClassName; 87 this.classBytes = classBytes; 88 this.constants = constants; 89 } 90 91 /** 92 * Returns the main class name. 93 * @return the main class name 94 */ 95 public String getMainClassName() { 96 return mainClassName; 97 } 98 99 /** 100 * Returns a map of class names to class bytes. 101 * @return map of class bytes 102 */ 103 public Map<String, byte[]> getClassBytes() { 104 return classBytes; 105 } 106 107 /** 108 * Returns the constants array. 109 * @return constants array 110 */ 111 public Object[] getConstants() { 112 return constants; 113 } 114 115 /** 116 * Returns the source of this cached script. 117 * @return the source 118 */ 119 public Source getSource() { 120 return source; 121 } 122 123 /** 124 * Sets the source of this cached script. 125 * @param source the source 126 */ 127 protected void setSource(final Source source) { 128 this.source = source; 129 } 130 131 @Override 132 public int hashCode() { 133 int hash = mainClassName.hashCode(); 134 hash = 31 * hash + classBytes.hashCode(); 135 hash = 31 * hash + Arrays.hashCode(constants); 136 return hash; 137 } 138 139 @Override 140 public boolean equals(Object obj) { 141 if (obj == this) { 142 return true; 143 } 144 if (!(obj instanceof CachedScript)) { 145 return false; 146 } 147 148 final CachedScript cs = (CachedScript) obj; 149 return mainClassName.equals(cs.mainClassName) 150 && classBytes.equals(cs.classBytes) 151 && Arrays.equals(constants, cs.constants); 152 } 153 } 154 }