Basic implementation of String.split
authorJaroslav Tulach <jaroslav.tulach@apidesign.org>
Mon, 09 Sep 2013 15:26:12 +0200
changeset 12723ee4ec9577bc
parent 1271 46e2b4ef85a4
child 1273 37ad459579bc
Basic implementation of String.split
rt/emul/compact/src/test/java/org/apidesign/bck2brwsr/tck/RegExpSplitTest.java
rt/emul/mini/src/main/java/java/lang/String.java
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/rt/emul/compact/src/test/java/org/apidesign/bck2brwsr/tck/RegExpSplitTest.java	Mon Sep 09 15:26:12 2013 +0200
     1.3 @@ -0,0 +1,50 @@
     1.4 +/**
     1.5 + * Back 2 Browser Bytecode Translator
     1.6 + * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
     1.7 + *
     1.8 + * This program is free software: you can redistribute it and/or modify
     1.9 + * it under the terms of the GNU General Public License as published by
    1.10 + * the Free Software Foundation, version 2 of the License.
    1.11 + *
    1.12 + * This program is distributed in the hope that it will be useful,
    1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.15 + * GNU General Public License for more details.
    1.16 + *
    1.17 + * You should have received a copy of the GNU General Public License
    1.18 + * along with this program. Look for COPYING file in the top folder.
    1.19 + * If not, see http://opensource.org/licenses/GPL-2.0.
    1.20 + */
    1.21 +package org.apidesign.bck2brwsr.tck;
    1.22 +
    1.23 +import java.util.Arrays;
    1.24 +import org.apidesign.bck2brwsr.vmtest.Compare;
    1.25 +import org.apidesign.bck2brwsr.vmtest.VMTest;
    1.26 +import org.testng.annotations.Factory;
    1.27 +
    1.28 +/**
    1.29 + *
    1.30 + * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
    1.31 + */
    1.32 +public class RegExpSplitTest {
    1.33 +
    1.34 +    public @Compare Object splitSpace() {
    1.35 +        return Arrays.asList("How are you today?".split(" "));
    1.36 +    }
    1.37 +
    1.38 +    public @Compare Object splitSpaceTrimMinusOne() {
    1.39 +        return Arrays.asList(" How are you today? ".split(" ", -1));
    1.40 +    }
    1.41 +
    1.42 +    public @Compare Object splitSpaceTrimZero() {
    1.43 +        return Arrays.asList(" How are you today? ".split(" ", 0));
    1.44 +    }
    1.45 +
    1.46 +    public @Compare Object splitSpaceLimit2() {
    1.47 +        return Arrays.asList("How are you today?".split(" ", 2));
    1.48 +    }
    1.49 +    
    1.50 +    @Factory public static Object[] create() {
    1.51 +        return VMTest.create(RegExpSplitTest.class);
    1.52 +    }
    1.53 +}
     2.1 --- a/rt/emul/mini/src/main/java/java/lang/String.java	Mon Sep 09 06:08:00 2013 +0200
     2.2 +++ b/rt/emul/mini/src/main/java/java/lang/String.java	Mon Sep 09 15:26:12 2013 +0200
     2.3 @@ -2315,8 +2315,35 @@
     2.4       * @spec JSR-51
     2.5       */
     2.6      public String[] split(String regex, int limit) {
     2.7 -        throw new UnsupportedOperationException("Needs regexp");
     2.8 +        if (limit <= 0) {
     2.9 +            Object[] arr = splitImpl(this, regex, Integer.MAX_VALUE);
    2.10 +            int to = arr.length;
    2.11 +            if (limit == 0) {
    2.12 +                while (to > 1 && ((String)arr[--to]).isEmpty()) {
    2.13 +                }
    2.14 +                to++;
    2.15 +            }
    2.16 +            String[] ret = new String[to];
    2.17 +            System.arraycopy(arr, 0, ret, 0, to);
    2.18 +            return ret;
    2.19 +        } else {
    2.20 +            Object[] arr = splitImpl(this, regex, limit);
    2.21 +            String[] ret = new String[arr.length];
    2.22 +            int pos = 0;
    2.23 +            for (int i = 0; i < arr.length; i++) {
    2.24 +                final String s = (String)arr[i];
    2.25 +                ret[i] = s;
    2.26 +                pos = indexOf(s, pos) + s.length();
    2.27 +            }
    2.28 +            ret[arr.length - 1] += substring(pos);
    2.29 +            return ret;
    2.30 +        }
    2.31      }
    2.32 +    
    2.33 +    @JavaScriptBody(args = { "str", "regex", "limit"}, body = 
    2.34 +        "return str.split(new RegExp(regex), limit);"
    2.35 +    )
    2.36 +    private static native Object[] splitImpl(String str, String regex, int limit);
    2.37  
    2.38      /**
    2.39       * Splits this string around matches of the given <a