io.deephaven.engine.table.impl.StaticAsOfJoinStateManager Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of deephaven-engine-table Show documentation

Engine Table: Implementation and closely-coupled utilities

There is a newer version: 0.37.1

Show newest version

/**
 * Copyright (c) 2016-2022 Deephaven Data Labs and Patent Pending
 */
package io.deephaven.engine.table.impl;

import io.deephaven.engine.table.ColumnSource;

import java.util.Arrays;
import java.util.Objects;
import java.util.stream.Collectors;

public abstract class StaticAsOfJoinStateManager {
    protected final ColumnSource[] keySourcesForErrorMessages;

    protected StaticAsOfJoinStateManager(ColumnSource[] keySourcesForErrorMessages) {
        this.keySourcesForErrorMessages = keySourcesForErrorMessages;
    }

    // produce a pretty key for error messages
    protected String extractKeyStringFromSourceTable(long leftKey) {
        if (keySourcesForErrorMessages.length == 1) {
            return Objects.toString(keySourcesForErrorMessages[0].get(leftKey));
        }
        return "[" + Arrays.stream(keySourcesForErrorMessages).map(ls -> Objects.toString(ls.get(leftKey))).collect(Collectors.joining(", ")) + "]";
    }
}