AbstractVector implements Vector, LengthCachingVector { @Override public Vector viewPart(int offset, int length) { if (offset < 0) { throw new IndexException(offset, size); } if (offset + length > size) { throw new IndexException(offset + length, size); } return new VectorView(this, offset, length); } protected  AbstractVector(int size); @Override Iterable<Element> all(); @Override Iterable<Element> nonZeroes(); @Override double aggregate(DoubleDoubleFunction aggregator, DoubleFunction map); @Override double aggregate(Vector other, DoubleDoubleFunction aggregator, DoubleDoubleFunction combiner); @Override Vector viewPart(int offset, int length); @SuppressWarnings("CloneDoesntDeclareCloneNotSupportedException") @Override Vector clone(); @Override Vector divide(double x); @Override double dot(Vector x); @Override double get(int index); @Override Element getElement(int index); @Override Vector normalize(); @Override Vector normalize(double power); @Override Vector logNormalize(); @Override Vector logNormalize(double power); Vector logNormalize(double power, double normLength); @Override double norm(double power); @Override double getLengthSquared(); @Override void invalidateCachedLength(); @Override double getDistanceSquared(Vector that); @Override double maxValue(); @Override int maxValueIndex(); @Override double minValue(); @Override int minValueIndex(); @Override Vector plus(double x); @Override Vector plus(Vector that); @Override Vector minus(Vector that); @Override void set(int index, double value); @Override void incrementQuick(int index, double increment); @Override Vector times(double x); @Override Vector times(Vector that); @Override double zSum(); @Override int getNumNonZeroElements(); @Override Vector assign(double value); @Override Vector assign(double[] values); @Override Vector assign(Vector other); @Override Vector assign(DoubleDoubleFunction f, double y); @Override Vector assign(DoubleFunction f); @Override Vector assign(Vector other, DoubleDoubleFunction function); @Override Matrix cross(Vector other); @Override final int size(); @Override String asFormatString(); @Override int hashCode(); @Override boolean equals(Object o); @Override String toString(); String toString(String[] dictionary); String sparseVectorToString();  }
@Test public void testViewPart() { Vector part = test.viewPart(1, 2); assertEquals("part size", 2, part.getNumNondefaultElements()); for (int i = 0; i < part.size(); i++) { assertEquals("part[" + i + ']', test.get(i+1), part.get(i), EPSILON); } }
@Test(expected = IndexException.class) public void testViewPartUnder() { test.viewPart(-1, values.length); }
@Test(expected = IndexException.class) public void testViewPartOver() { test.viewPart(2, 7); }
@Test(expected = IndexException.class) public void testViewPartCardinality() { test.viewPart(1, 8); }