Examples with ISearchOperationCallback org.apache.hyracks.storage.common.ISearchOperationCallback used on opensource projects

Example 6 with ISearchOperationCallback

use of org.apache.hyracks.storage.common.ISearchOperationCallback in project asterixdb by apache.

the class ExternalBTreeSearchOperatorNodePushable method open.

// We override the open function to search a specific version of the index
@Override
public void open() throws HyracksDataException {
    writer.open();
    accessor = new FrameTupleAccessor(inputRecDesc);
    indexHelper.open();
    index = indexHelper.getIndexInstance();
    if (retainMissing) {
        int fieldCount = getFieldCount();
        nonMatchTupleBuild = new ArrayTupleBuilder(fieldCount);
        DataOutput out = nonMatchTupleBuild.getDataOutput();
        for (int i = 0; i < fieldCount; i++) {
            try {
                nonMatchWriter.writeMissing(out);
            } catch (IOException e) {
                e.printStackTrace();
            }
            nonMatchTupleBuild.addFieldEndOffset();
        }
    } else {
        nonMatchTupleBuild = null;
    }
    ExternalBTreeWithBuddy externalIndex = (ExternalBTreeWithBuddy) index;
    try {
        searchPred = createSearchPredicate();
        tb = new ArrayTupleBuilder(recordDesc.getFieldCount());
        dos = tb.getDataOutput();
        appender = new FrameTupleAppender(new VSizeFrame(ctx));
        ISearchOperationCallback searchCallback = searchCallbackFactory.createSearchOperationCallback(indexHelper.getResource().getId(), ctx, null);
        // The next line is the reason we override this method
        indexAccessor = externalIndex.createAccessor(searchCallback, version);
        cursor = createCursor();
        if (retainInput) {
            frameTuple = new FrameTupleReference();
        }
    } catch (Throwable th) {
        throw new HyracksDataException(th);
    }
}