Don't generate String constants either ReducedStack
authorJaroslav Tulach <jaroslav.tulach@apidesign.org>
Tue, 18 Feb 2014 10:02:46 +0100
branchReducedStack
changeset 14743775fe162073
parent 1473 484248c9c1d6
child 1476 dbfabad86e5c
Don't generate String constants either
rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeParser.java
rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
rt/vm/src/test/java/org/apidesign/vm4brwsr/NoStringCnstntsTest.java
     1.1 --- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeParser.java	Mon Feb 17 17:49:30 2014 +0100
     1.2 +++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeParser.java	Tue Feb 18 10:02:46 2014 +0100
     1.3 @@ -1261,7 +1261,7 @@
     1.4          int name_index;
     1.5          int descriptor_index;
     1.6          int attributes_count;
     1.7 -        int value_cpx = 0;
     1.8 +        int value_cpx = -1;
     1.9          boolean isSynthetic = false;
    1.10          boolean isDeprecated = false;
    1.11          Vector attrs;
    1.12 @@ -1382,11 +1382,8 @@
    1.13              return isDeprecated;
    1.14          }
    1.15  
    1.16 -        /**
    1.17 -         * Returns index of constant value in cpool.
    1.18 -         */
    1.19 -        public int getConstantValueIndex() {
    1.20 -            return (value_cpx);
    1.21 +        public boolean hasConstantValue() {
    1.22 +            return value_cpx != -1;
    1.23          }
    1.24  
    1.25          /**
     2.1 --- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Mon Feb 17 17:49:30 2014 +0100
     2.2 +++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Tue Feb 18 10:02:46 2014 +0100
     2.3 @@ -153,8 +153,8 @@
     2.4          }
     2.5          for (FieldData v : jc.getFields()) {
     2.6              if (v.isStatic()) {
     2.7 -                if ((v.access & ACC_FINAL) != 0) {
     2.8 -                    if (v.getInternalSig().length() == 1) {
     2.9 +                if ((v.access & ACC_FINAL) != 0 && v.hasConstantValue()) {
    2.10 +                    if (v.getInternalSig().length() == 1 || v.getInternalSig().equals("Ljava/lang/String;")) {
    2.11                          continue;
    2.12                      }
    2.13                  }
     3.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     3.2 +++ b/rt/vm/src/test/java/org/apidesign/vm4brwsr/NoStringCnstntsTest.java	Tue Feb 18 10:02:46 2014 +0100
     3.3 @@ -0,0 +1,62 @@
     3.4 +/**
     3.5 + * Back 2 Browser Bytecode Translator
     3.6 + * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
     3.7 + *
     3.8 + * This program is free software: you can redistribute it and/or modify
     3.9 + * it under the terms of the GNU General Public License as published by
    3.10 + * the Free Software Foundation, version 2 of the License.
    3.11 + *
    3.12 + * This program is distributed in the hope that it will be useful,
    3.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    3.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    3.15 + * GNU General Public License for more details.
    3.16 + *
    3.17 + * You should have received a copy of the GNU General Public License
    3.18 + * along with this program. Look for COPYING file in the top folder.
    3.19 + * If not, see http://opensource.org/licenses/GPL-2.0.
    3.20 + */
    3.21 +
    3.22 +package org.apidesign.vm4brwsr;
    3.23 +
    3.24 +import java.io.IOException;
    3.25 +import java.io.InputStream;
    3.26 +import static org.testng.Assert.assertEquals;
    3.27 +import org.testng.annotations.AfterClass;
    3.28 +import org.testng.annotations.BeforeClass;
    3.29 +import org.testng.annotations.Test;
    3.30 +
    3.31 +/**
    3.32 + *
    3.33 + * @author Jaroslav Tulach <jtulach@netbeans.org>
    3.34 + */
    3.35 +public class NoStringCnstntsTest {
    3.36 +    private static String code;
    3.37 +
    3.38 +    
    3.39 +    @Test public void dontGeneratePrimitiveFinalConstants() {
    3.40 +        assertEquals(code.indexOf("HELLO"), -1, "MISSING_CONSTANT field should not be generated");
    3.41 +    }
    3.42 +    
    3.43 +    @BeforeClass 
    3.44 +    public static void compileTheCode() throws Exception {
    3.45 +        final String res = "org/apidesign/vm4brwsr/StringSample";
    3.46 +        StringBuilder sb = new StringBuilder();
    3.47 +        class JustStaticMethod implements Bck2Brwsr.Resources {
    3.48 +            @Override
    3.49 +            public InputStream get(String resource) throws IOException {
    3.50 +                final String cn = res + ".class";
    3.51 +                if (resource.equals(cn)) {
    3.52 +                    return getClass().getClassLoader().getResourceAsStream(cn);
    3.53 +                }
    3.54 +                return null;
    3.55 +            }
    3.56 +        }
    3.57 +        Bck2Brwsr.generate(sb, new JustStaticMethod(), res);
    3.58 +        code = sb.toString();
    3.59 +    }
    3.60 +    @AfterClass
    3.61 +    public static void releaseTheCode() {
    3.62 +        code = null;
    3.63 +    }
    3.64 +    
    3.65 +}