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