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1 package nabble.naml.namespaces;
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2
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3 import nabble.naml.compiler.Command;
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4 import nabble.naml.compiler.CommandSpec;
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5 import nabble.naml.compiler.IPrintWriter;
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6 import nabble.naml.compiler.Interpreter;
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7 import nabble.naml.compiler.Namespace;
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8
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9 import java.util.regex.Matcher;
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10
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11
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12 @Namespace (
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13 name = "regex",
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14 global = true
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15 )
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16 public class RegexNamespace extends Sequence {
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17 private final Matcher matcher;
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18 private final String source; // only for debugging
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19 private boolean started = false;
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20 private boolean isFound = false;
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21
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22 public RegexNamespace(Matcher matcher,String source) {
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23 this.matcher = matcher;
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24 this.source = source;
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25 }
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26
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27 private boolean find() {
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28 started = true;
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29 return isFound = matcher.find();
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30 }
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31
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32 @Command public void find(IPrintWriter out,Interpreter interp) {
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33 out.print( find() );
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34 }
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35
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36 @Command public void matches(IPrintWriter out,Interpreter interp) {
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37 out.print( matcher.matches() );
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38 }
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39
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40 public static final CommandSpec found = new CommandSpec.Builder()
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41 .optionalParameters("group")
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42 .build()
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43 ;
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44
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45 @Command public void found(IPrintWriter out,Interpreter interp) {
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46 String group = interp.getArgString("group");
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47 out.print( group==null ? matcher.group() : matcher.group(Integer.parseInt(group)) );
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48 }
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49
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50 @Command public void has_more_elements(IPrintWriter out,Interpreter interp) {
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51 if( !started ) {
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52 out.print( matcher.find() );
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53 matcher.reset();
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54 } else if( isFound ) {
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55 int start = matcher.start();
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56 out.print( matcher.find() );
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57 if( !matcher.find(start) )
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58 throw new RuntimeException();
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59 } else {
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60 out.print( false );
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61 }
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62 }
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63
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64 @Command public void next_element(IPrintWriter out,Interpreter interp) {
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65 out.print( find() );
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66 }
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67
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68 @Command public void current_element(IPrintWriter out,Interpreter interp) {
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69 out.print( matcher.group() );
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70 }
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71
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72 }
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