`BatchPoints.Builder` not reusable

[jpalus]

There's nothing in BatchPoints.Builder javadoc that would warn against calling build() multiple times:

influxdb-java/src/main/java/org/influxdb/dto/BatchPoints.java

Lines 54 to 57 in b1d1d8a

	/**
	* The Builder to create a new BatchPoints instance.
	*/
	public static final class Builder {

influxdb-java/src/main/java/org/influxdb/dto/BatchPoints.java

Lines 151 to 156 in b1d1d8a

	/**
	* Create a new BatchPoints instance.
	*
	* @return the created BatchPoints.
	*/
	public BatchPoints build() {

and nothing in build() method itself that would cause ie exception:

influxdb-java/src/main/java/org/influxdb/dto/BatchPoints.java

Lines 156 to 174 in b1d1d8a

	public BatchPoints build() {
	BatchPoints batchPoints = new BatchPoints();
	batchPoints.setDatabase(this.database);
	for (Point point : this.points) {
	point.getTags().putAll(this.tags);
	}
	batchPoints.setPoints(this.points);
	batchPoints.setRetentionPolicy(this.retentionPolicy);
	batchPoints.setTags(this.tags);
	if (null == this.consistency) {
	this.consistency = ConsistencyLevel.ONE;
	}
	batchPoints.setConsistency(this.consistency);
	if (null == this.precision) {
	this.precision = TimeUnit.NANOSECONDS;
	}
	batchPoints.setPrecision(this.precision);
	return batchPoints;
	}

but creating multiple BatchPoints instances from BatchPoints.Builder is not actually safe since BatchPoints.Builder does not make defensive copy of this.points:

influxdb-java/src/main/java/org/influxdb/dto/BatchPoints.java

Line 162 in b1d1d8a

batchPoints.setPoints(this.points);

so ie this code will fail:

BatchPoints bp1 = builder.build();
int size = bp1.getPoints().size();
bp1.point(point);
BatchPoints bp2 = builder.build();
assertEquals(size, bp2.getPoints().size());

since bp1.point(point) modified collection builder refers to.