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 
  26 package jdk.nashorn.internal.runtime;
  27 
  28 import java.io.Serializable;
  29 import java.util.Arrays;
  30 import java.util.LinkedHashMap;
  31 import java.util.Map;
  32 
  33 /**
  34  * Class representing a persistent compiled script.
  35  */
  36 public final class StoredScript implements Serializable {
  37 
  38     /** Compilation id */
  39     private final int compilationId;
  40 
  41     /** Main class name. */
  42     private final String mainClassName;
  43 
  44     /** Map of class names to class bytes. */
  45     private final Map<String, byte[]> classBytes;
  46 
  47     /** Constants array. */
  48     private final Object[] constants;
  49 
  50     /** Function initializers */
  51     private final Map<Integer, FunctionInitializer> initializers;
  52 
  53     private static final long serialVersionUID = 2958227232195298340L;
  54 
  55     /**
  56      * Constructor.
  57      *
  58      * @param mainClassName main class name
  59      * @param classBytes map of class names to class bytes
  60      * @param constants constants array
  61      */
  62     public StoredScript(final int compilationId, final String mainClassName, final Map<String, byte[]> classBytes, final Map<Integer, FunctionInitializer> initializers, final Object[] constants) {
  63         this.compilationId = compilationId;
  64         this.mainClassName = mainClassName;
  65         this.classBytes = classBytes;
  66         this.constants = constants;
  67         this.initializers = initializers;
  68     }
  69 
  70     public int getCompilationId() {
  71         return compilationId;
  72     }
  73 
  74     /**
  75      * Returns the main class name.
  76      * @return the main class name
  77      */
  78     public String getMainClassName() {
  79         return mainClassName;
  80     }
  81 
  82     /**
  83      * Returns a map of class names to class bytes.
  84      * @return map of class bytes
  85      */
  86     public Map<String, byte[]> getClassBytes() {
  87         final Map<String, byte[]> clonedMap = new LinkedHashMap<>();
  88         for (final Map.Entry<String, byte[]> entry : classBytes.entrySet()) {
  89             clonedMap.put(entry.getKey(), entry.getValue().clone());
  90         }
  91         return clonedMap;
  92     }
  93 
  94     /**
  95      * Returns the constants array.
  96      * @return constants array
  97      */
  98     public Object[] getConstants() {
  99         return constants.clone();
 100     }
 101 
 102     /**
 103      * Returns the function initializers map.
 104      * @return The initializers map.
 105      */
 106     public Map<Integer, FunctionInitializer> getInitializers() {
 107         final Map<Integer, FunctionInitializer> clonedMap = new LinkedHashMap<>();
 108         for (final Map.Entry<Integer, FunctionInitializer> entry : initializers.entrySet()) {
 109             clonedMap.put(entry.getKey(), new FunctionInitializer(entry.getValue()));
 110         }
 111         return clonedMap;
 112     }
 113 
 114     @Override
 115     public int hashCode() {
 116         int hash = mainClassName.hashCode();
 117         hash = 31 * hash + classBytes.hashCode();
 118         hash = 31 * hash + Arrays.hashCode(constants);
 119         return hash;
 120     }
 121 
 122     @Override
 123     public boolean equals(final Object obj) {
 124         if (obj == this) {
 125             return true;
 126         }
 127         if (!(obj instanceof StoredScript)) {
 128             return false;
 129         }
 130 
 131         final StoredScript cs = (StoredScript) obj;
 132         return mainClassName.equals(cs.mainClassName)
 133                 && classBytes.equals(cs.classBytes)
 134                 && Arrays.equals(constants, cs.constants);
 135     }
 136 }