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java.lang.Objectorg.apache.derby.impl.store.access.conglomerate.ConglomerateUtil
public final class ConglomerateUtil
Static utility routine package for all Conglomerates.
A collection of static utility routines that are shared by multiple Conglomerate implementations.
Constructor Summary | |
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ConglomerateUtil()
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Method Summary | |
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static int[] |
createCollationIds(int sizeof_ids,
int[] collationIds)
Given an array of columnOrderings, return an array of collation ids. |
static int[] |
createFormatIds(DataValueDescriptor[] template)
Given an array of objects, return an array of format id's. |
static java.util.Properties |
createRawStorePropertySet(java.util.Properties prop)
Create a list of all the properties that Access wants to export through the getInternalTablePropertySet() call. |
static java.util.Properties |
createUserRawStorePropertySet(java.util.Properties prop)
Create a list of all the properties that Access wants to export through the getInternalTablePropertySet() call. |
static java.lang.String |
debugPage(Page page,
int start_slot,
boolean full_rh,
DataValueDescriptor[] template)
Format a page of data, as access see's it. |
static void |
readCollationIdArray(int[] collation_id_array,
java.io.ObjectInput in)
Read "sparse" array of collation id's The format to be read first has the number of entries as a compressed int. |
static int[] |
readFormatIdArray(int num,
java.io.ObjectInput in)
Read a format id array in from a stream. |
static void |
writeCollationIdArray(int[] collation_id_array,
java.io.ObjectOutput out)
Write array of collation id's as a sparse array. |
static void |
writeFormatIdArray(int[] format_id_array,
java.io.ObjectOutput out)
Write a format id array to a stream. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ConglomerateUtil()
Method Detail |
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public static java.util.Properties createRawStorePropertySet(java.util.Properties prop)
This utility routine creates a list of properties that are shared by all conglomerates. This list contains the following: derby.storage.initialPages derby.storage.minimumRecordSize derby.storage.pageReservedSpace derby.storage.pageSize derby.storage.reusableRecordId
prop
- If non-null the property set to fill in.
public static java.util.Properties createUserRawStorePropertySet(java.util.Properties prop)
This utility routine creates a list of properties that are shared by all conglomerates. This list contains the following: derby.storage.initialPages derby.storage.minimumRecordSize derby.storage.pageReservedSpace derby.storage.pageSize
prop
- If non-null the property set to fill in.
public static int[] createFormatIds(DataValueDescriptor[] template)
template
- a row.
public static int[] readFormatIdArray(int num, java.io.ObjectInput in) throws java.io.IOException
num
- The number of format ids to read.in
- The stream to read the array of format id's from.
java.io.IOException
- Thown on read error.public static void writeFormatIdArray(int[] format_id_array, java.io.ObjectOutput out) throws java.io.IOException
format_id_array
- The array of format ids to write.out
- The stream to write the array of format id's to.
java.io.IOException
- Thown on write error.public static int[] createCollationIds(int sizeof_ids, int[] collationIds)
If input array is null, produce a default collation_id array of all StringDataValue.COLLATION_TYPE_UCS_BASIC values.
public static void writeCollationIdArray(int[] collation_id_array, java.io.ObjectOutput out) throws java.io.IOException
The format only writes out those array entries which are not StringDataValue.COLLATION_TYPE_UCS_BASIC. The sparse array first writes the number of entries as a compressed int. And then for each non-COLLATION_TYPE_UCS_BASIC, it writes out a pair of compressed ints: (array offset, array entry value)
collation_id_array
- The array of collation ids to write.out
- The stream to write the collation id's to.
java.io.IOException
- Thown on write error.public static void readCollationIdArray(int[] collation_id_array, java.io.ObjectInput in) throws java.io.IOException
The format to be read first has the number of entries as a compressed int. And then for each non-COLLATION_TYPE_UCS_BASIC value there is pair of compressed ints: (array offset, array entry value)
reads the sparse array as written by writeCollationIdArray().
collation_id_array
- update's only those array entries that have
been set in the sparse array stream.
Those values are set as indicated by reading
the sparse array from the stream.in
- The stream to read the collation info from.
java.io.IOException
public static java.lang.String debugPage(Page page, int start_slot, boolean full_rh, DataValueDescriptor[] template)
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