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Copy pathWriteConvertWorker.java
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229 lines (221 loc) · 11.8 KB
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/**
* This <tt>main</tt> method of this class writes the source code for the
* {@link uk.ac.starlink.array.ConvertWorker} class.
* It would be too error-prone to write it by hand.
*
* @author Mark Taylor (Starlink)
* @since 20 May 2004
*/
public class WriteConvertWorker {
public static void main( String[] args ) {
out( new String[] {
"",
"/*",
" * ***************************************************************************",
" * ** NOTE: Do not edit; this java source was written by WriteConvertWorker **",
" * ***************************************************************************",
" */",
"",
} );
out( new String[] {
"package uk.ac.starlink.array;",
"",
"abstract class ConvertWorker {",
"",
" abstract boolean isUnit();",
" abstract void convert( Object src, int srcPos,",
" Object dest, int destPos, int length );",
"",
" private static final byte MIN_BYTE = (byte) 0x81;",
" private static final short MIN_SHORT = (short) 0x8001;",
" private static final int MIN_INT = 0x80000001;",
" private static final float MIN_FLOAT = -Float.MAX_VALUE;",
" private static final double MIN_DOUBLE = -Double.MAX_VALUE;",
"",
" private static final byte MAX_BYTE = (byte) 0x7f;",
" private static final short MAX_SHORT = (short) 0x7fff;",
" private static final int MAX_INT = 0x7fffffff;",
" private static final float MAX_FLOAT = Float.MAX_VALUE;",
" private static final double MAX_DOUBLE = Double.MAX_VALUE;",
"",
" private static abstract class NonunitConvertWorker extends ConvertWorker {",
" private final BadHandler destHandler;",
" NonunitConvertWorker( BadHandler destHandler ) {",
" this.destHandler = destHandler;",
" }",
" final boolean isUnit() {",
" return false;",
" }",
" }",
"",
" static ConvertWorker makeWorker( Type sType, BadHandler sHandler,",
" Type dType, BadHandler dHandler ) {",
" return makeWorker( sType, sHandler, dType, dHandler, null );",
" }",
"",
" static ConvertWorker makeWorker( Type sType, final BadHandler sHandler,",
" Type dType, final BadHandler dHandler,",
" final Mapper mapper ) {",
" if ( false ) {",
" return null;",
" // dummy clause",
" }",
} );
TypeRep[] types = TypeRep.ALL_TYPES;
for ( int is = 0; is < types.length; is++ ) {
TypeRep s = types[ is ];
out( new String[] {
" else if ( sType == Type." + s.type + " &&" +
" dType == Type." + s.type + " &&",
" sHandler.equals( dHandler ) &&",
" mapper == null ) {",
" return new ConvertWorker() {",
" final boolean isUnit() {",
" return true;",
" }",
" final void convert( Object src, int srcPos,",
" Object dest, int destPos, int length ) {",
" System.arraycopy( src, srcPos, dest, destPos, length );",
" }",
" };",
" }",
} );
for ( int id = 0; id < types.length; id++ ) {
TypeRep d = types[ id ];
out( new String[] {
" else if ( sType == Type." + s.type + " &&" +
" dType == Type." + d.type + " ) {",
" " + d.primitive + "[] destbad = " +
"(" + d.primitive + "[]) Type." +
d.type + ".newArray( 1 );",
" dHandler.putBad( destbad, 0 );",
" final " + d.primitive + " dbad = destbad[ 0 ];",
} );
if ( is <= id ) {
out( new String[] {
" if ( mapper == null ) {",
" return new NonunitConvertWorker( dHandler ) {",
" final void convert( Object source, int srcPos,",
" Object destination, int destPos,",
" int length ) {",
" " + s.primitive + "[] src = " +
"(" + s.primitive + "[]) source;",
" " + d.primitive + "[] dest = " +
"(" + d.primitive + "[]) destination;",
" while ( length-- > 0 ) {",
" boolean isBad = sHandler.isBad( source, srcPos );",
" dest[ destPos ] =",
" isBad ? dbad",
" : (" + d.primitive + ") src[ srcPos ];",
" destPos++;",
" srcPos++;",
" }",
" }",
" };",
" }",
} );
}
else {
out( new String[] {
" if ( mapper == null ) {",
" return new NonunitConvertWorker( dHandler ) {",
" final void convert( Object source, int srcPos,",
" Object destination, int destPos,",
" int length ) {",
" " + s.primitive + "[] src = " +
"(" + s.primitive + "[]) source;",
" " + d.primitive + "[] dest = " +
"(" + d.primitive + "[]) destination;",
" while ( length-- > 0 ) {",
" " + s.primitive + " sval = src[ srcPos ];",
" boolean isBad = sHandler.isBad( source, srcPos )",
" || sval < MIN_" +
d.primitive.toUpperCase(),
" || sval > MAX_" +
d.primitive.toUpperCase() + ";",
" dest[ destPos ] =",
" isBad ? dbad",
" : (" + d.primitive + ") sval;",
" destPos++;",
" srcPos++;",
" }",
" }",
" };",
" }",
} );
}
out( new String[] {
" else {",
" return new NonunitConvertWorker( dHandler ) {",
" final void convert( Object source, int srcPos,",
" Object destination, int destPos,",
" int length ) {",
" " + s.primitive + "[] src = " +
"(" + s.primitive + "[]) source;",
" " + d.primitive + "[] dest = " +
"(" + d.primitive + "[]) destination;",
" while ( length-- > 0 ) {",
" if ( sHandler.isBad( source, srcPos ) ) {",
" dest[ destPos ] = dbad;",
" }",
" else {",
" double dvald =",
" mapper.func( (double) src[ srcPos ] );",
" boolean isBad = Double.isNaN( dvald )",
" || dvald < (double) MIN_" +
d.primitive.toUpperCase(),
" || dvald > (double) MAX_" +
d.primitive.toUpperCase() + ";",
" dest[ destPos ] =",
" isBad ? dbad",
" : (" + d.primitive + ") dvald;",
" }",
" destPos++;",
" srcPos++;",
" }",
" }",
" };",
" }",
} );
out( " }" );
}
}
out( new String[] {
" else {",
" // assert false;",
" return null;",
" }",
" }",
"",
" static interface Mapper {",
" double func( double x );",
" }",
"}",
} );
}
private static void out( String[] lines ) {
for ( int i = 0; i < lines.length; i++ ) {
out( lines[ i ] );
}
}
private static void out( String line ) {
System.out.println( line );
}
private static class TypeRep {
private final String type;
private final String primitive;
private final String wrapper;
private TypeRep( String type, String wrapper, String primitive ) {
this.type = type;
this.wrapper = wrapper;
this.primitive = primitive;
}
public static final TypeRep[] ALL_TYPES = new TypeRep[] {
new TypeRep( "BYTE", "Byte", "byte" ),
new TypeRep( "SHORT", "Short", "short" ),
new TypeRep( "INT", "Integer", "int" ),
new TypeRep( "FLOAT", "Float", "float" ),
new TypeRep( "DOUBLE", "Double", "double" ),
};
}
}