A persistent multi-version map: move to the main source tree

h2/src/tools/org/h2/dev/store/type/DataType.java

-/*
- * Copyright 2004-2011 H2 Group. Multiple-Licensed under the H2 License,
- * Version 1.0, and under the Eclipse Public License, Version 1.0
- * (http://h2database.com/html/license.html).
- * Initial Developer: H2 Group
- */
-package org.h2.dev.store.type;
-
-import java.nio.ByteBuffer;
-
-/**
- * A data type.
- */
-public interface DataType {
-
-    /**
-     * Compare two keys.
-     *
-     * @param a the first key
-     * @param b the second key
-     * @return -1 if the first key is smaller, 1 if larger, and 0 if equal
-     */
-    int compare(Object a, Object b);
-
-    /**
-     * Get the maximum length in bytes used to store an object. In many cases,
-     * this method can be faster than calculating the exact length.
-     *
-     * @param obj the object
-     * @return the maximum length
-     */
-    int getMaxLength(Object obj);
-
-    /**
-     * Estimate the used memory in bytes.
-     *
-     * @param obj the object
-     * @return the used memory
-     */
-    int getMemory(Object obj);
-
-    /**
-     * Write the object.
-     *
-     * @param buff the target buffer
-     * @param obj the value
-     */
-    void write(ByteBuffer buff, Object obj);
-
-    /**
-     * Read an object.
-     *
-     * @param buff the source buffer
-     * @return the object
-     */
-    Object read(ByteBuffer buff);
-
-    /**
-     * Get the stable string representation that is used to build this data
-     * type.
-     * <p>
-     * To avoid conflict with the default factory, the returned string should
-     * start with the package name of the type factory.
-     *
-     * @return the string representation
-     */
-    String asString();
-
-}
-

h2/src/tools/org/h2/dev/store/type/DataTypeFactory.java

-/*
- * Copyright 2004-2011 H2 Group. Multiple-Licensed under the H2 License,
- * Version 1.0, and under the Eclipse Public License, Version 1.0
- * (http://h2database.com/html/license.html).
- * Initial Developer: H2 Group
- */
-package org.h2.dev.store.type;
-
-/**
- * A factory for maps and data types.
- */
-public interface DataTypeFactory {
-
-    /**
-     * Set the parent factory.
-     *
-     * @param parent the parent factory
-     */
-    void setParent(DataTypeFactory parent);
-
-    /**
-     * Parse the data type.
-     *
-     * @param dataType the string and type specific meta data
-     * @return the type, or null if unknown
-     */
-    DataType buildDataType(String dataType);
-
-    /**
-     * Get the data type identifier for the given class.
-     * <p>
-     * To avoid conflict with the default factory, the returned string should
-     * start with the package name of the type factory.
-     *
-     * @param objectClass the class
-     * @return the data type identifier, or null if not supported
-     */
-    String getDataType(Class<?> objectClass);
-
-}

h2/src/tools/org/h2/dev/store/type/ObjectTypeFactory.java

-/*
- * Copyright 2004-2011 H2 Group. Multiple-Licensed under the H2 License, Version
- * 1.0, and under the Eclipse Public License, Version 1.0
- * (http://h2database.com/html/license.html). Initial Developer: H2 Group
- */
-package org.h2.dev.store.type;
-
-import org.h2.dev.store.rtree.SpatialType;
-
-/**
- * A data type factory.
- */
-public class ObjectTypeFactory implements DataTypeFactory {
-
-    @Override
-    public void setParent(DataTypeFactory parent) {
-        // never called for this factory
-    }
-
-    @Override
-    public DataType buildDataType(String s) {
-        if ("s".equals(s)) {
-            return SpatialType.fromString(s);
-        } else if ("o".equals(s)) {
-            return new ObjectType();
-        }
-        return null;
-    }
-
-    @Override
-    public String getDataType(Class<?> objectClass) {
-        if (objectClass == SpatialType.class) {
-            return "s";
-        }
-        return "o";
-    }
-
-}

h2/src/tools/org/h2/dev/store/type/StringType.java

-/*
- * Copyright 2004-2011 H2 Group. Multiple-Licensed under the H2 License,
- * Version 1.0, and under the Eclipse Public License, Version 1.0
- * (http://h2database.com/html/license.html).
- * Initial Developer: H2 Group
- */
-package org.h2.dev.store.type;
-
-import java.nio.ByteBuffer;
-import org.h2.dev.store.btree.DataUtils;
-
-/**
- * A string type.
- */
-public class StringType implements DataType {
-
-    public static final StringType INSTANCE = new StringType();
-
-    public int compare(Object a, Object b) {
-        return a.toString().compareTo(b.toString());
-    }
-
-    public int getMaxLength(Object obj) {
-        return DataUtils.MAX_VAR_INT_LEN + 3 * obj.toString().length();
-    }
-
-    public int getMemory(Object obj) {
-        return 24 + 2 * obj.toString().length();
-    }
-
-    public String read(ByteBuffer buff) {
-        int len = DataUtils.readVarInt(buff);
-        return DataUtils.readString(buff, len);
-    }
-
-    public void write(ByteBuffer buff, Object obj) {
-        String s = obj.toString();
-        int len = s.length();
-        DataUtils.writeVarInt(buff, len);
-        DataUtils.writeStringData(buff, s, len);
-    }
-
-    public String asString() {
-        return "";
-    }
-
-}
-

h2/src/tools/org/h2/dev/store/type/package.html

-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-<!--
-Copyright 2004-2011 H2 Group. Multiple-Licensed under the H2 License, Version 1.0,
-and under the Eclipse Public License, Version 1.0
-(http://h2database.com/html/license.html).
-Initial Developer: H2 Group
--->
-<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
-<head><meta http-equiv="Content-Type" content="text/html;charset=utf-8" /><title>
-Javadoc package documentation
-</title></head><body style="font: 9pt/130% Tahoma, Arial, Helvetica, sans-serif; font-weight: normal;"><p>
-
-Data types and serialization / deserialization
-
-</p></body></html>
\ No newline at end of file