Example usage for java.io DataOutput writeUTF

Introduction

In this page you can find the example usage for java.io DataOutput writeUTF.

Prototype

void writeUTF(String s) throws IOException;

Source Link

Document

Writes two bytes of length information to the output stream, followed by the modified UTF-8 representation of every character in the string s.

Usage

From source file:org.apache.vxquery.runtime.functions.cast.CastToStringOperation.java

@Override
public void convertDouble(DoublePointable doublep, DataOutput dOut) throws SystemException, IOException {
    abvsInner.reset();/*from   w  ww  .  j  a va  2  s . c om*/
    double value = doublep.getDouble();

    if (Double.isInfinite(value)) {
        if (value == Double.NEGATIVE_INFINITY) {
            FunctionHelper.writeCharSequence("-", dOutInner);
        }
        FunctionHelper.writeCharSequence("INF", dOutInner);
        sendStringDataOutput(dOut);
    } else if (Double.isNaN(value)) {
        FunctionHelper.writeCharSequence("NaN", dOutInner);
        sendStringDataOutput(dOut);
    } else if (value == -0.0 || value == 0.0) {
        long bits = Double.doubleToLongBits(value);
        boolean negative = ((bits >> 63) == 0) ? false : true;

        if (negative) {
            FunctionHelper.writeChar('-', dOutInner);
        }
        FunctionHelper.writeCharSequence("0", dOutInner);
        sendStringDataOutput(dOut);
    } else if (Math.abs(value) >= 0.000001 && Math.abs(value) <= 10000000) {
        //the jdk (toString function) does not output number in desired format when 
        //a number is between one and ten million, so we take care of this 
        //case separately here.
        CastToDecimalOperation castToDecimal = new CastToDecimalOperation();
        castToDecimal.convertDouble(doublep, dOutInner);
        XSDecimalPointable decp = (XSDecimalPointable) XSDecimalPointable.FACTORY.createPointable();
        decp.set(abvsInner.getByteArray(), abvsInner.getStartOffset() + 1,
                XSDecimalPointable.TYPE_TRAITS.getFixedLength());
        if (Math.abs(value) <= 1000000) {
            convertDecimal(decp, dOut);
        } else {
            decimalToScientificNotn(decp, dOut);
        }
    } else {
        dOut.write(returnTag);
        dOut.writeUTF(Double.toString(value));
    }
}