234 lines
10 KiB
Java
234 lines
10 KiB
Java
/*
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* Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package nsk.share.gc;
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import java.io.*;
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/**
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* <tt>Generator</tt> creates classes that have huge number of fields
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* (about 65536). All files are generated into a directory that is passed
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* as a first argument to method <code>main</code> The classes are intended to
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* be used used by <code>gc/gctests/LargeObjects/large00*</code> tests.
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* <p>
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* The class generates:
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* <ul>
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* <li> 8 "simple" parent classes that have 65500 fields of 7 primitive
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* types and type Object and have just one modifier;
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* <li> 8 "simple" child classes that extend correspondent parent class and
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* have 46 fileds of the same type (total number of fields in the class
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* is over the limitation 65535);
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* <li> 8 "simple" child classes that extend correspondent parent class and
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* have 35 fileds of the same type (total number of fields in the class
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* is under the limitation 65535);
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* <li> 5 "combined" parent classes that have 32616 fields of each primitive
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* types, type Object, one and two dimensional arrays of each type with
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* one modifier;
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* <li> 5 "combined" child classes that extend correspondent parent class and
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* have 33030 fileds (total number of fields in the class is over the
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* limitation 65535);
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* <li> 5 "combined" child classes that extend correspondent parent class and
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* have 33018 fileds (total number of fields in the class is under the
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* limitation 65535).
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* </ul>
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*/
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public class Generator {
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// All tested field types
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private final static String[] TYPES = {"byte", "int", "long", "short",
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"boolean", "double", "float",
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"Object"};
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// All tested field modifiers
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private final static String[] SIMPLE_MODIFIERS = {"static", "private",
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"public", "protected",
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"transient", "volatile",
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"static", "public"};
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// All tested field modifiers
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private final static String[] COMBINED_MODIFIERS = {"static", "public",
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"protected", "transient",
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"volatile"};
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// Some constants that are used during generaion of each file
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private final static String EXT = ".java";
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private final static String PACKAGE = "package nsk.share.gc.newclass;\n";
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private final static String CLASS_BEGIN = "public class ";
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private final static String PARENT_SUFFIX = "parent";
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private final static String PARENT_FIELD_PREFIX = "p";
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private final static int SIMPLE_PARENT_FIELDS_NUM = 65500;
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private final static int COMBINED_PARENT_FIELDS_NUM = 32616;
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private final static String FIELD_NAME = "f";
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private final static String LCHILD_SUFFIX = "lchild";
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private final static int SIMPLE_LCHILD_FIELDS_NUM = 46;
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private final static int COMBINED_LCHILD_FIELDS_NUM = 33030;
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private final static String SCHILD_SUFFIX = "schild";
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private final static int SIMPLE_SCHILD_FIELDS_NUM = 35;
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private final static int COMBINED_SCHILD_FIELDS_NUM = 33018;
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/**
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* Default constructor.
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*
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*/
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public Generator() {}
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/**
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* Generates classes.
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*
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* @param argv array of arguments passed to the class.
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*
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* @throws <tt>FileNotFoundException</tt> if directory that.is passed as
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* the first argument does not exist.
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*
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*/
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public static void main(String[] argv) throws FileNotFoundException {
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// Generate classes that have fields of one type and with one
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// modifier
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for (int i = 0; i < SIMPLE_MODIFIERS.length; i++)
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generateSimple(System.out, argv[0], TYPES[i], SIMPLE_MODIFIERS[i]);
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// Generate classes that have fields of different types with one
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// modifier
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for (int i = 0; i < COMBINED_MODIFIERS.length; i++)
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generateCombined(System.out, argv[0], COMBINED_MODIFIERS[i]);
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}
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// Generate classes that have fields of one type and with one modifier
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private static void generateSimple(PrintStream out, String dir, String type,
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String modifier) throws FileNotFoundException {
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// Generate parent class
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String parentName = modifier + "_" + type + "_" + PARENT_SUFFIX;
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try (PrintWriter pw = getPrintWriter(dir, parentName + EXT)) {
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pw.println(PACKAGE);
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pw.println(CLASS_BEGIN + parentName + " {");
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// Even if "private" modifier is tested, parent class must have "public"
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// fields, so that child class could have access to them
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String m = modifier;
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if (modifier.equals("private"))
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m = "public";
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for (int i = 0; i < SIMPLE_PARENT_FIELDS_NUM; i++)
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pw.println(m + " " + type + " "
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+ PARENT_FIELD_PREFIX + FIELD_NAME + (i + 1) + ";");
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pw.println("public Object objP = null;");
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pw.println("}");
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}
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// Generate two children that extend the parent
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generateSimpleChild(modifier + "_" + type + "_" + LCHILD_SUFFIX,
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type, modifier, dir, parentName,
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SIMPLE_LCHILD_FIELDS_NUM);
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generateSimpleChild(modifier + "_" + type + "_" + SCHILD_SUFFIX,
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type, modifier, dir, parentName,
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SIMPLE_SCHILD_FIELDS_NUM);
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}
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// Generate a child that extends specified parent class
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private static void generateSimpleChild(String className, String type,
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String modifier, String dir,
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String parentName, int num)
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throws FileNotFoundException {
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try (PrintWriter pw = getPrintWriter(dir, className + EXT)) {
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pw.println(PACKAGE);
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pw.println(CLASS_BEGIN + className + " extends " + parentName + " {");
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for (int i = 0; i < num; i++)
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pw.println(modifier + " " + type + " " + FIELD_NAME + (i + 1)
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+ ";");
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pw.println("public Object objC = null;");
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pw.println("}");
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}
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}
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// Generate classes that have fields of different types with one modifier
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private static void generateCombined(PrintStream out, String dir,
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String modifier) throws FileNotFoundException {
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// Generate parent class
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String parentName = modifier + "_combination_" + PARENT_SUFFIX;
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try (PrintWriter pw = getPrintWriter(dir, parentName + EXT)){
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pw.println(PACKAGE);
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pw.println(CLASS_BEGIN + parentName + " {");
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String pattern = PARENT_FIELD_PREFIX + FIELD_NAME;
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for (int i = 0; i < COMBINED_PARENT_FIELDS_NUM; ) {
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for (int j = 0; j < TYPES.length; j++) {
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pw.println(modifier + " " + TYPES[j] + " "
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+ pattern + (i + 1) + ", "
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+ pattern + (i + 2) + "[], "
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+ pattern + (i + 3) + "[][];");
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i = i + 3;
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}
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}
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pw.println("public Object objP = null;");
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pw.println("}");
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}
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// Generate two children that extend the parent
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generateCombinedChild(modifier + "_combination_" + LCHILD_SUFFIX,
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modifier, dir, parentName,
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COMBINED_LCHILD_FIELDS_NUM);
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generateCombinedChild(modifier + "_combination_" + SCHILD_SUFFIX,
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modifier, dir, parentName,
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COMBINED_SCHILD_FIELDS_NUM);
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}
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// Generate a child that extends specified parent class
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private static void generateCombinedChild(String className, String modifier,
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String dir, String parentName,
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int num)
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throws FileNotFoundException {
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try (PrintWriter pw = getPrintWriter(dir, className + EXT)) {
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pw.println(PACKAGE);
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pw.println(CLASS_BEGIN + className + " extends " + parentName + " {");
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for (int i = 0; i < num; )
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for (int j = 0; j < TYPES.length; j++) {
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pw.println(modifier + " " + TYPES[j] + " "
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+ FIELD_NAME + (i + 1) + ", "
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+ FIELD_NAME + (i + 2) + "[], "
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+ FIELD_NAME + (i + 3) + "[][];");
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i = i + 3;
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if (i >= num)
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break;
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}
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pw.println("public Object objC = null;");
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pw.println("}");
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}
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}
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// Create a new PrintWriter
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private static PrintWriter getPrintWriter(String dir, String name)
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throws FileNotFoundException {
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FileOutputStream stream = new FileOutputStream(new File(dir, name));
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return new PrintWriter(stream, true);
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}
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}
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