@Override public IndexMappingBuffer take() { IndexMappingBuffer buffer = provider.take(); if (buffer == null) return null; lastReturned = buffer.export(); return buffer; } }
@Override public IndexMappingBuffer take() { IndexMappingBuffer currentBuffer = provider.take(); if (currentBuffer == null) return null; currentBuffer.addSign(true); return currentBuffer; }
private static boolean mappingExists(Tensor from, Tensor to) { final IndexMappingProvider pp = IndexMappings.createPort( IndexMappingProvider.Util.singleton(new IndexMappingBufferImpl()), from, to); pp.tick(); return pp.take() != null; }
@Override public IndexMappingBuffer take() { OUTER: while (true) { final IndexMappingBuffer buffer = mainProvider.take(); if (buffer == null) return null; buffer.removeContracted(); //buffer.addSignum(cache.lastReturned.sign); final IndexMappingBufferTester tester = new IndexMappingBufferTester(buffer.export().mergeWith(cache.lastReturned)); for (Tester t : testers) if (!t.test(tester)) continue OUTER; //buffer.addSignum(cache.lastReturned.sign); return buffer; } }
/** * Tests whether specified {@link IndexMappingBufferTester} is a real mapping of tensor {@code from} * on tensor {@code to}. * * @param tester tester of mappings * @param from from tensor * @param to to tensor * @return {@code true} if there is mapping of tensor {@code from} on tensor {@code to} equal * to specified mapping */ public static boolean test(IndexMappingBufferTester tester, Tensor from, Tensor to) { tester.reset(); final IndexMappingProvider provider = IndexMappings.createPort(IndexMappingProvider.Util.singleton(tester), from, to); provider.tick(); IndexMappingBuffer buffer; while ((buffer = provider.take()) != null) if (!buffer.getSign()) return true; return false; }