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h2database
提交 c3e89b0c authored 作者: Noel Grandin's avatar Noel Grandin
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document type in ValueLobDb a little

上级 4675d719
隐藏空白字符变更
内嵌 并排
正在显示 包含 27 行增加 和 24 行删除
h2/src/main/org/h2/value/ValueLobDb.java
浏览文件 @ c3e89b0c
......@@ -42,7 +42,10 @@ import org.h2.util.Utils;
public class ValueLobDb extends Value implements Value.ValueClob,
Value.ValueBlob {
private final int type;
/**
* the value type (Value.BLOB or CLOB)
*/
private final int valueType;
private final long lobId;
private final byte[] hmac;
private final byte[] small;
......@@ -66,7 +69,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
private ValueLobDb(int type, DataHandler handler, int tableId, long lobId,
byte[] hmac, long precision) {
this.type = type;
this.valueType = type;
this.handler = handler;
this.tableId = tableId;
this.lobId = lobId;
......@@ -78,7 +81,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
}
private ValueLobDb(int type, byte[] small, long precision) {
this.type = type;
this.valueType = type;
this.small = small;
this.precision = precision;
this.lobId = 0;
......@@ -94,7 +97,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
*/
private ValueLobDb(DataHandler handler, Reader in, long remaining)
throws IOException {
this.type = Value.CLOB;
this.valueType = Value.CLOB;
this.handler = handler;
this.small = null;
this.lobId = 0;
......@@ -126,7 +129,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
*/
private ValueLobDb(DataHandler handler, byte[] buff, int len, InputStream in,
long remaining) throws IOException {
this.type = Value.BLOB;
this.valueType = Value.BLOB;
this.handler = handler;
this.small = null;
this.lobId = 0;
......@@ -167,7 +170,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
/**
* Create a LOB value.
*
* @param type the type
* @param type the type (Value.BLOB or CLOB)
* @param handler the data handler
* @param tableId the table id
* @param id the lob id
......@@ -194,7 +197,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
*/
@Override
public Value convertTo(int t, int precision, Mode mode, Object column, String[] enumerators) {
if (t == type) {
if (t == valueType) {
return this;
} else if (t == Value.CLOB) {
if (handler != null) {
......@@ -248,7 +251,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
} else if (small.length > database.getMaxLengthInplaceLob()) {
LobStorageInterface s = database.getLobStorage();
Value v;
if (type == Value.BLOB) {
if (valueType == Value.BLOB) {
v = s.createBlob(getInputStream(), getPrecision());
} else {
v = s.createClob(getReader(), getPrecision());
......@@ -272,7 +275,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
@Override
public int getType() {
return type;
return valueType;
}
@Override
......@@ -285,7 +288,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
int len = precision > Integer.MAX_VALUE || precision == 0 ?
Integer.MAX_VALUE : (int) precision;
try {
if (type == Value.CLOB) {
if (valueType == Value.CLOB) {
if (small != null) {
return new String(small, StandardCharsets.UTF_8);
}
......@@ -305,7 +308,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
@Override
public byte[] getBytes() {
if (type == CLOB) {
if (valueType == CLOB) {
// convert hex to string
return super.getBytes();
}
......@@ -315,7 +318,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
@Override
public byte[] getBytesNoCopy() {
if (type == CLOB) {
if (valueType == CLOB) {
// convert hex to string
return super.getBytesNoCopy();
}
......@@ -337,7 +340,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
// it in the database file
return (int) (precision ^ (precision >>> 32));
}
if (type == CLOB) {
if (valueType == CLOB) {
hash = getString().hashCode();
} else {
hash = Utils.getByteArrayHash(getBytes());
......@@ -357,7 +360,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
return 0;
}
}
if (type == Value.CLOB) {
if (valueType == Value.CLOB) {
return Integer.signum(getString().compareTo(v.getString()));
}
byte[] v2 = v.getBytesNoCopy();
......@@ -366,7 +369,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
@Override
public Object getObject() {
if (type == Value.CLOB) {
if (valueType == Value.CLOB) {
return getReader();
}
return getInputStream();
......@@ -379,7 +382,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
@Override
public Reader getReader(long oneBasedOffset, long length) {
return ValueLob.rangeReader(getReader(), oneBasedOffset, length, type == Value.CLOB ? precision : -1);
return ValueLob.rangeReader(getReader(), oneBasedOffset, length, valueType == Value.CLOB ? precision : -1);
}
@Override
......@@ -392,7 +395,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
return new BufferedInputStream(new FileStoreInputStream(store,
handler, false, alwaysClose), Constants.IO_BUFFER_SIZE);
}
long byteCount = (type == Value.BLOB) ? precision : -1;
long byteCount = (valueType == Value.BLOB) ? precision : -1;
try {
return handler.getLobStorage().getInputStream(this, hmac, byteCount);
} catch (IOException e) {
......@@ -413,7 +416,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
inputStream = new BufferedInputStream(new FileStoreInputStream(store,
handler, false, alwaysClose), Constants.IO_BUFFER_SIZE);
} else {
byteCount = (type == Value.BLOB) ? precision : -1;
byteCount = (valueType == Value.BLOB) ? precision : -1;
try {
inputStream = handler.getLobStorage().getInputStream(this, hmac, byteCount);
} catch (IOException e) {
......@@ -430,7 +433,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
if (p > Integer.MAX_VALUE || p <= 0) {
p = -1;
}
if (type == Value.BLOB) {
if (valueType == Value.BLOB) {
prep.setBinaryStream(parameterIndex, getInputStream(), (int) p);
} else {
prep.setCharacterStream(parameterIndex, getReader(), (int) p);
......@@ -440,7 +443,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
@Override
public String getSQL() {
String s;
if (type == Value.CLOB) {
if (valueType == Value.CLOB) {
s = getString();
return StringUtils.quoteStringSQL(s);
}
......@@ -455,7 +458,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
return getSQL();
}
StringBuilder buff = new StringBuilder();
if (type == Value.CLOB) {
if (valueType == Value.CLOB) {
buff.append("SPACE(").append(getPrecision());
} else {
buff.append("CAST(REPEAT('00', ").append(getPrecision()).append(") AS BINARY");
......@@ -650,13 +653,13 @@ public class ValueLobDb extends Value implements Value.ValueClob,
return this;
}
ValueLobDb lob;
if (type == CLOB) {
if (valueType == CLOB) {
if (handler == null) {
try {
int p = MathUtils.convertLongToInt(precision);
String s = IOUtils.readStringAndClose(getReader(), p);
byte[] data = s.getBytes(StandardCharsets.UTF_8);
lob = ValueLobDb.createSmallLob(type, data, s.length());
lob = ValueLobDb.createSmallLob(valueType, data, s.length());
} catch (IOException e) {
throw DbException.convertIOException(e, null);
}
......@@ -668,7 +671,7 @@ public class ValueLobDb extends Value implements Value.ValueClob,
try {
int p = MathUtils.convertLongToInt(precision);
byte[] data = IOUtils.readBytesAndClose(getInputStream(), p);
lob = ValueLobDb.createSmallLob(type, data, data.length);
lob = ValueLobDb.createSmallLob(valueType, data, data.length);
} catch (IOException e) {
throw DbException.convertIOException(e, null);
}
......
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