hyracks/hyracks-test-support/src/main/java/edu/uci/ics/hyracks/storage/am/common/TestOperationCallback.java

package edu.uci.ics.hyracks.storage.am.common;

import java.util.Random;

import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;

public enum TestOperationCallback implements ISearchOperationCallback, IModificationOperationCallback {
    INSTANCE;

    private static final int RANDOM_SEED = 50;
    private final Random random = new Random();

    private TestOperationCallback() {
        random.setSeed(RANDOM_SEED);
    }

    @Override
    public boolean proceed(ITupleReference tuple) {
        // Always fail
        return false;
    }

    @Override
    public void reconcile(ITupleReference tuple) {
        // Do nothing.
    }

    @Override
    public void before(ITupleReference tuple) {
        // Do nothing.        
    }

    @Override
    public void found(ITupleReference before, ITupleReference after) {
        // Do nothing.        
    }

    @Override
    public void cancel(ITupleReference tuple) {
        // Do nothing.
    }

    @Override
    public void complete(ITupleReference tuple) throws HyracksDataException {
        // Do nothing.
    }

}