| java.lang.Object
 org.h2.store.DataPage
All known Subclasses: org.h2.store.DataPageText, org.h2.store.DataPageBinary,
| DataPage | | abstract public class DataPage (Code) | | A data page is a byte buffer that contains persistent data of a row or index
page.
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| Field Summary | |
| final static boolean | CHECKSUM
| | protected byte[] | data
The data itself. | | protected DataHandler | handler
The data handler responsible for lob objects. | | protected int | pos
The current write or read position. |
| CHECKSUM | | final static boolean CHECKSUM(Code) | | |
| data | | protected byte[] data(Code) | | The data itself.
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| handler | | protected DataHandler handler(Code) | | The data handler responsible for lob objects.
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| pos | | protected int pos(Code) | | The current write or read position.
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| check | | abstract public void check(int len) throws SQLException(Code) | | Test if the checksum is correct.
Parameters:
len - the number of bytes
throws:
SQLException - if the checksum does not match |
| checkCapacity | | public void checkCapacity(int plus)(Code) | | |
| fill | | abstract public void fill(int len)(Code) | | Increase the size to the given length.
The current position is set to the given value.
Parameters:
len - the new length |
| fillAligned | | public void fillAligned()(Code) | | |
| getBytes | | public byte[] getBytes()(Code) | | |
| getFillerLength | | abstract public int getFillerLength()(Code) | | The space required for the checksum and additional fillers.
the size |
| getIntLen | | abstract public int getIntLen()(Code) | | Get the length of an integer value.
the length |
| getLongLen | | abstract public int getLongLen(long x)(Code) | | Get the length of a long value.
Parameters:
x - the value the length |
| getStringLen | | abstract public int getStringLen(String s)(Code) | | Get the length of a String value.
Parameters:
s - the value the length |
| length | | public int length()(Code) | | |
| read | | public void read(byte[] buff, int off, int len)(Code) | | |
| readByte | | public int readByte()(Code) | | |
| readInt | | abstract public int readInt()(Code) | | Read an integer at the current position.
The current position is incremented.
the value |
| readLong | | public long readLong()(Code) | | |
| readString | | abstract public String readString()(Code) | | Read a String value.
The current position is incremented.
the value |
| reset | | public void reset()(Code) | | |
| setInt | | abstract public void setInt(int pos, int x)(Code) | | Update an integer at the given position.
The current position is not change.
Parameters:
pos - the position
Parameters:
x - the value |
| setPos | | public void setPos(int pos)(Code) | | |
| updateChecksum | | abstract public void updateChecksum()(Code) | | Calculate the checksum and write.
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| write | | public void write(byte[] buff, int off, int len)(Code) | | |
| writeByte | | public void writeByte(byte x)(Code) | | |
| writeDataPageNoSize | | public void writeDataPageNoSize(DataPage page)(Code) | | |
| writeInt | | abstract public void writeInt(int x)(Code) | | Write an integer at the current position.
The current position is incremented.
Parameters:
x - the value |
| writeLong | | public void writeLong(long x)(Code) | | |
| writeString | | abstract public void writeString(String s)(Code) | | Write a String value.
The current position is incremented.
Parameters:
s - the value |
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