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Berkeley DB Java Edition is a open source, transactional storage solution for Java applications. The Direct Persistence Layer (DPL) API is faster and easier to develop, deploy, and manage than serialized object files or ORM-based Java persistence solutions. The Collections API enhances the standard java.util.collections classes allowing them to be persisted to a local file system and accessed concurrently while protected by ACID transactions. Data is stored by serializing objects and managing class and instance data separately so as not to waste space. Berkeley DB Java Edition is the reliable drop-in solution for complex, fast, and scalable storage. Source for this release is in 'je-4.0.92-sources.jar', the Javadoc is located at 'http://download.oracle.com/berkeley-db/docs/je/4.0.92/'.

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/*-
 * Copyright (C) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
 *
 * This file was distributed by Oracle as part of a version of Oracle Berkeley
 * DB Java Edition made available at:
 *
 * http://www.oracle.com/technetwork/database/database-technologies/berkeleydb/downloads/index.html
 *
 * Please see the LICENSE file included in the top-level directory of the
 * appropriate version of Oracle Berkeley DB Java Edition for a copy of the
 * license and additional information.
 */

package com.sleepycat.persist.impl;

import java.util.IdentityHashMap;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;

import com.sleepycat.compat.DbCompat;
import com.sleepycat.persist.raw.RawObject;

/**
 * Read-only catalog operations used when initializing new formats.  This
 * catalog is used temprarily when the main catalog has not been updated yet,
 * but the new formats need to do catalog lookups.
 *
 * @see PersistCatalog#addNewFormat
 *
 * @author Mark Hayes
 */
class ReadOnlyCatalog implements Catalog {

    private final ClassLoader classLoader;
    private List formatList;
    private Map formatMap;

    ReadOnlyCatalog(ClassLoader classLoader,
                    List formatList,
                    Map formatMap) {
        this.classLoader = classLoader;
        this.formatList = formatList;
        this.formatMap = formatMap;
    }

    public int getInitVersion(Format format, boolean forReader) {
        return Catalog.CURRENT_VERSION;
    }

    public Format getFormat(int formatId, boolean expectStored) {
        try {
            Format format = formatList.get(formatId);
            if (format == null) {
                throw DbCompat.unexpectedState
                    ("Format does not exist: " + formatId);
            }
            return format;
        } catch (NoSuchElementException e) {
            throw DbCompat.unexpectedState
                ("Format does not exist: " + formatId);
        }
    }

    public Format getFormat(Class cls, boolean checkEntitySubclassIndexes) {
        Format format = formatMap.get(cls.getName());
        if (format == null) {
            throw new IllegalArgumentException
                ("Class is not persistent: " + cls.getName());
        }
        return format;
    }

    public Format getFormat(String className) {
        return formatMap.get(className);
    }

    public Format createFormat(String clsName,
                               Map newFormats) {
        throw DbCompat.unexpectedState();
    }

    public Format createFormat(Class type, Map newFormats) {
        throw DbCompat.unexpectedState();
    }

    public boolean isRawAccess() {
        return false;
    }

    public Object convertRawObject(RawObject o, IdentityHashMap converted) {
        throw DbCompat.unexpectedState();
    }

    public Class resolveClass(String clsName)
        throws ClassNotFoundException {

        return SimpleCatalog.resolveClass(clsName, classLoader);
    }

    public Class resolveKeyClass(String clsName) {
        return SimpleCatalog.resolveKeyClass(clsName, classLoader);
    }
}