UnitizedDoubleArrayToString.java

package org.andork.unit;

import java.util.function.DoubleFunction;
import java.util.function.Function;

public class UnitizedDoubleArrayToString<T extends UnitType<T>> implements Function<UnitizedDoubleArray<T>, String> {
	String delimiter;
	Function<UnitizedDoubleArray<T>, Unit<T>> outputUnit;
	DoubleFunction<String> doubleToString;
	Function<Unit<T>, String> unitName;

	public UnitizedDoubleArrayToString(String delimiter, Function<UnitizedDoubleArray<T>, Unit<T>> outputUnit,
			DoubleFunction<String> doubleToString, Function<Unit<T>, String> unitName) {
		super();
		this.delimiter = delimiter;
		this.outputUnit = outputUnit;
		this.doubleToString = doubleToString;
		this.unitName = unitName;
	}

	@Override
	public String apply(UnitizedDoubleArray<T> t) {
		if (t == null) {
			return null;
		}

		Unit<T> outputUnit = this.outputUnit.apply(t);

		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < t.length(); i++) {
			if (i > 0) {
				sb.append(delimiter);
			}
			sb.append(doubleToString.apply(t.get(i, outputUnit)));
		}
		if (t.length() > 0) {
			sb.append(' ');
			sb.append(unitName.apply(outputUnit));
		}

		return sb.toString();
	}
}