fullstack/algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/compiler/PigletPrinterFactoryProvider.java

package edu.uci.ics.hyracks.algebricks.examples.piglet.compiler;

import java.io.IOException;
import java.io.PrintStream;

import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
import edu.uci.ics.hyracks.algebricks.data.IPrinter;
import edu.uci.ics.hyracks.algebricks.data.IPrinterFactory;
import edu.uci.ics.hyracks.algebricks.data.IPrinterFactoryProvider;
import edu.uci.ics.hyracks.algebricks.data.impl.IntegerPrinterFactory;
import edu.uci.ics.hyracks.algebricks.data.utils.WriteValueTools;
import edu.uci.ics.hyracks.algebricks.examples.piglet.types.Type;
import edu.uci.ics.hyracks.dataflow.common.data.marshalling.FloatSerializerDeserializer;

public class PigletPrinterFactoryProvider implements IPrinterFactoryProvider {

    public static final PigletPrinterFactoryProvider INSTANCE = new PigletPrinterFactoryProvider();

    private PigletPrinterFactoryProvider() {
    }

    @Override
    public IPrinterFactory getPrinterFactory(Object type) throws AlgebricksException {
        Type t = (Type) type;
        switch (t.getTag()) {
            case INTEGER:
                return IntegerPrinterFactory.INSTANCE;
            case CHAR_ARRAY:
                return CharArrayPrinterFactory.INSTANCE;
            case FLOAT:
                return FloatPrinterFactory.INSTANCE;
            default:
                throw new UnsupportedOperationException();

        }
    }

    public static class CharArrayPrinterFactory implements IPrinterFactory {

        private static final long serialVersionUID = 1L;

        public static final CharArrayPrinterFactory INSTANCE = new CharArrayPrinterFactory();

        private CharArrayPrinterFactory() {
        }

        @Override
        public IPrinter createPrinter() {
            return new IPrinter() {
                @Override
                public void init() throws AlgebricksException {
                }

                @Override
                public void print(byte[] b, int s, int l, PrintStream ps) throws AlgebricksException {
                    try {
                        WriteValueTools.writeUTF8String(b, s, l, ps);
                    } catch (IOException e) {
                        throw new AlgebricksException(e);
                    }
                }
            };
        }
    }

    public static class FloatPrinterFactory implements IPrinterFactory {

        private static final long serialVersionUID = 1L;

        public static final FloatPrinterFactory INSTANCE = new FloatPrinterFactory();

        private FloatPrinterFactory() {
        }

        @Override
        public IPrinter createPrinter() {
            return new IPrinter() {
                @Override
                public void init() throws AlgebricksException {
                }

                @Override
                public void print(byte[] b, int s, int l, PrintStream ps) throws AlgebricksException {
                    ps.print(FloatSerializerDeserializer.getFloat(b, s));
                }
            };
        }
    }

}