suneido.database.immudb.IndexInfo.java Source code

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Here is the source code for suneido.database.immudb.IndexInfo.java

Source

/* Copyright 2011 (c) Suneido Software Corp. All rights reserved.
 * Licensed under GPLv2.
 */

package suneido.database.immudb;

import static suneido.util.Util.commaSplitter;

import java.util.Arrays;

import suneido.util.Immutable;

import com.google.common.base.MoreObjects;
import com.google.common.collect.Iterables;
import com.google.common.primitives.Ints;

/**
 * {@link BtreeInfo} plus columns
 * <p>
 * Used by {@link TableInfo}
 */
@Immutable
class IndexInfo extends BtreeInfo {
    static final int NFIELDS = 5;
    final int[] columns;

    IndexInfo(int[] columns, BtreeInfo info) {
        super(info.root, info.rootNode, info.treeLevels, info.nnodes, info.totalSize);
        this.columns = columns;
    }

    IndexInfo(int[] columns, int root, int treeLevels, int nnodes, int totalSize) {
        super(root, treeLevels, nnodes, totalSize);
        this.columns = columns;
    }

    IndexInfo(Record rec, int i) {
        super(rec.getInt(i + 1), rec.getInt(i + 2), rec.getInt(i + 3), rec.getInt(i + 4));
        columns = convertColumns(rec.getString(i));
    }

    IndexInfo(IndexInfo info, BtreeNode rootNode) {
        super(rootNode.address(), rootNode, info.treeLevels, info.nnodes, info.totalSize);
        this.columns = info.columns;
    }

    private static int[] convertColumns(String s) {
        Iterable<String> cs = commaSplitter(s);
        int[] cols = new int[Iterables.size(cs)];
        int c = 0;
        for (String col : cs)
            cols[c++] = Integer.parseInt(col);
        return cols;
    }

    void addToRecord(RecordBuilder rb) {
        assert root != 0;
        rb.add(Ints.join(",", columns)).add(root).add(treeLevels).add(nnodes).add(totalSize);
    }

    static void addToRecord(RecordBuilder rb, String columns, BtreeInfo info) {
        rb.add(columns).add(info.root).add(info.treeLevels).add(info.nnodes);
    }

    void check() {
        assert !IntRefs.isIntRef(root);
    }

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(this).add("columns", Arrays.toString(columns)).add("root", root)
                .add("rootNode", rootNode).add("treeLevels", treeLevels).add("nnodes", nnodes)
                .add("totalSize", totalSize).toString();
    }

}