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comparison src/nabble/naml/compiler/TemplatePrintWriter.java @ 0:7ecd1a4ef557

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author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 21 Mar 2019 19:15:52 -0600
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-1:000000000000 0:7ecd1a4ef557
1 package nabble.naml.compiler;
2
3 import java.io.Writer;
4
5
6 public class TemplatePrintWriter extends PrintWriter {
7
8 public static final TemplatePrintWriter NULL = new TemplatePrintWriter( new Writer() {
9 public void write(char[] cbuf,int off,int len) {}
10 public void flush() {}
11 public void close() {}
12 } );
13
14 public TemplatePrintWriter(Writer out) {
15 super(out);
16 }
17
18 public void print(Object obj) {
19 if( obj == null )
20 throw new NamlNullPointerException("null written to stream");
21 if( obj instanceof BlockWrapper ) {
22 ((BlockWrapper)obj).printTo(this);
23 } else {
24 super.print(obj);
25 }
26 }
27
28 public void print(String s) {
29 if( s == null )
30 throw new NamlNullPointerException("null written to stream");
31 super.print(s);
32 }
33
34 public void print(Boolean b) {
35 throw new RuntimeException("no Booleans allowed, use boolean instead");
36 }
37
38 }