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SQLInput

public interface SQLInput

java.sql.SQLInput

An input stream that contains a stream of values representing an instance of an SQL structured type or an SQL distinct type. This interface, used only for custom mapping, is used by the driver behind the scenes, and a programmer never directly invokes SQLInput methods. The reader methods (readLong, readBytes, and so on) provide a way for an implementation of the SQLData interface to read the values in an SQLInput object. And as described in SQLData, calls to reader methods must be made in the order that their corresponding attributes appear in the SQL definition of the type. The method wasNull is used to determine whether the last value read was SQL NULL.

When the method getObject is called with an object of a class implementing the interface SQLData, the JDBC driver calls the method SQLData.getSQLType to determine the SQL type of the user-defined type (UDT) being custom mapped. The driver creates an instance of SQLInput, populating it with the attributes of the UDT. The driver then passes the input stream to the method SQLData.readSQL, which in turn calls the SQLInput reader methods in its implementation for reading the attributes from the input stream.

Summary

Public methods
`abstract Array`	`readArray()` Reads an SQL `ARRAY` value from the stream and returns it as an `Array` object in the Java programming language.
`abstract InputStream`	`readAsciiStream()` Reads the next attribute in the stream and returns it as a stream of ASCII characters.
`abstract BigDecimal`	`readBigDecimal()` Reads the next attribute in the stream and returns it as a `java.math.BigDecimal` object in the Java programming language.
`abstract InputStream`	`readBinaryStream()` Reads the next attribute in the stream and returns it as a stream of uninterpreted bytes.
`abstract Blob`	`readBlob()` Reads an SQL `BLOB` value from the stream and returns it as a `Blob` object in the Java programming language.
`abstract boolean`	`readBoolean()` Reads the next attribute in the stream and returns it as a `boolean` in the Java programming language.
`abstract byte`	`readByte()` Reads the next attribute in the stream and returns it as a `byte` in the Java programming language.
`abstract byte[]`	`readBytes()` Reads the next attribute in the stream and returns it as an array of bytes in the Java programming language.
`abstract Reader`	`readCharacterStream()` Reads the next attribute in the stream and returns it as a stream of Unicode characters.
`abstract Clob`	`readClob()` Reads an SQL `CLOB` value from the stream and returns it as a `Clob` object in the Java programming language.
`abstract Date`	`readDate()` Reads the next attribute in the stream and returns it as a `java.sql.Date` object.
`abstract double`	`readDouble()` Reads the next attribute in the stream and returns it as a `double` in the Java programming language.
`abstract float`	`readFloat()` Reads the next attribute in the stream and returns it as a `float` in the Java programming language.
`abstract int`	`readInt()` Reads the next attribute in the stream and returns it as an `int` in the Java programming language.
`abstract long`	`readLong()` Reads the next attribute in the stream and returns it as a `long` in the Java programming language.
`abstract NClob`	`readNClob()` Reads an SQL `NCLOB` value from the stream and returns it as a `NClob` object in the Java programming language.
`abstract String`	`readNString()` Reads the next attribute in the stream and returns it as a `String` in the Java programming language.
`abstract Object`	`readObject()` Reads the datum at the head of the stream and returns it as an `Object` in the Java programming language.
`abstract Ref`	`readRef()` Reads an SQL `REF` value from the stream and returns it as a `Ref` object in the Java programming language.
`abstract RowId`	`readRowId()` Reads an SQL `ROWID` value from the stream and returns it as a `RowId` object in the Java programming language.
`abstract SQLXML`	`readSQLXML()` Reads an SQL `XML` value from the stream and returns it as a `SQLXML` object in the Java programming language.
`abstract short`	`readShort()` Reads the next attribute in the stream and returns it as a `short` in the Java programming language.
`abstract String`	`readString()` Reads the next attribute in the stream and returns it as a `String` in the Java programming language.
`abstract Time`	`readTime()` Reads the next attribute in the stream and returns it as a `java.sql.Time` object.
`abstract Timestamp`	`readTimestamp()` Reads the next attribute in the stream and returns it as a `java.sql.Timestamp` object.
`abstract URL`	`readURL()` Reads an SQL `DATALINK` value from the stream and returns it as a `java.net.URL` object in the Java programming language.
`abstract boolean`	`wasNull()` Retrieves whether the last value read was SQL `NULL`.

Public methods

readArray

public abstract Array readArray ()

Reads an SQL ARRAY value from the stream and returns it as an Array object in the Java programming language.

Returns
`Array`	an `Array` object representing data of the SQL `ARRAY` value at the head of the stream; `null` if the value read is SQL `NULL`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readAsciiStream

public abstract InputStream readAsciiStream ()

Reads the next attribute in the stream and returns it as a stream of ASCII characters.

Returns
`InputStream`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readBigDecimal

public abstract BigDecimal readBigDecimal ()

Reads the next attribute in the stream and returns it as a java.math.BigDecimal object in the Java programming language.

Returns
`BigDecimal`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readBinaryStream

public abstract InputStream readBinaryStream ()

Reads the next attribute in the stream and returns it as a stream of uninterpreted bytes.

Returns
`InputStream`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readBlob

public abstract Blob readBlob ()

Reads an SQL BLOB value from the stream and returns it as a Blob object in the Java programming language.

Returns
`Blob`	a `Blob` object representing data of the SQL `BLOB` value at the head of the stream; `null` if the value read is SQL `NULL`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readBoolean

public abstract boolean readBoolean ()

Reads the next attribute in the stream and returns it as a boolean in the Java programming language.

Returns
`boolean`	the attribute; if the value is SQL `NULL`, returns `false`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readByte

public abstract byte readByte ()

Reads the next attribute in the stream and returns it as a byte in the Java programming language.

Returns
`byte`	the attribute; if the value is SQL `NULL`, returns `0`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readBytes

public abstract byte[] readBytes ()

Reads the next attribute in the stream and returns it as an array of bytes in the Java programming language.

Returns
`byte[]`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readCharacterStream

public abstract Reader readCharacterStream ()

Reads the next attribute in the stream and returns it as a stream of Unicode characters.

Returns
`Reader`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readClob

public abstract Clob readClob ()

Reads an SQL CLOB value from the stream and returns it as a Clob object in the Java programming language.

Returns
`Clob`	a `Clob` object representing data of the SQL `CLOB` value at the head of the stream; `null` if the value read is SQL `NULL`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readDate

public abstract Date readDate ()

Reads the next attribute in the stream and returns it as a java.sql.Date object.

Returns
`Date`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readDouble

public abstract double readDouble ()

Reads the next attribute in the stream and returns it as a double in the Java programming language.

Returns
`double`	the attribute; if the value is SQL `NULL`, returns `0`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readFloat

public abstract float readFloat ()

Reads the next attribute in the stream and returns it as a float in the Java programming language.

Returns
`float`	the attribute; if the value is SQL `NULL`, returns `0`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readInt

public abstract int readInt ()

Reads the next attribute in the stream and returns it as an int in the Java programming language.

Returns
`int`	the attribute; if the value is SQL `NULL`, returns `0`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readLong

public abstract long readLong ()

Reads the next attribute in the stream and returns it as a long in the Java programming language.

Returns
`long`	the attribute; if the value is SQL `NULL`, returns `0`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readNClob

public abstract NClob readNClob ()

Reads an SQL NCLOB value from the stream and returns it as a NClob object in the Java programming language.

Returns
`NClob`	a `NClob` object representing data of the SQL `NCLOB` value at the head of the stream; `null` if the value read is SQL `NULL`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readNString

public abstract String readNString ()

Reads the next attribute in the stream and returns it as a String in the Java programming language. It is intended for use when accessing NCHAR,NVARCHAR and LONGNVARCHAR columns.

Returns
`String`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readObject

public abstract Object readObject ()

Reads the datum at the head of the stream and returns it as an Object in the Java programming language. The actual type of the object returned is determined by the default type mapping, and any customizations present in this stream's type map.

A type map is registered with the stream by the JDBC driver before the stream is passed to the application.

When the datum at the head of the stream is an SQL NULL, the method returns null. If the datum is an SQL structured or distinct type, it determines the SQL type of the datum at the head of the stream. If the stream's type map has an entry for that SQL type, the driver constructs an object of the appropriate class and calls the method SQLData.readSQL on that object, which reads additional data from the stream, using the protocol described for that method.

Returns
`Object`	the datum at the head of the stream as an `Object` in the Java programming language;`null` if the datum is SQL `NULL`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readRef

public abstract Ref readRef ()

Reads an SQL REF value from the stream and returns it as a Ref object in the Java programming language.

Returns
`Ref`	a `Ref` object representing the SQL `REF` value at the head of the stream; `null` if the value read is SQL `NULL`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readRowId

public abstract RowId readRowId ()

Reads an SQL ROWID value from the stream and returns it as a RowId object in the Java programming language.

Returns
`RowId`	a `RowId` object representing data of the SQL `ROWID` value at the head of the stream; `null` if the value read is SQL `NULL`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readSQLXML

public abstract SQLXML readSQLXML ()

Reads an SQL XML value from the stream and returns it as a SQLXML object in the Java programming language.

Returns
`SQLXML`	a `SQLXML` object representing data of the SQL `XML` value at the head of the stream; `null` if the value read is SQL `NULL`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readShort

public abstract short readShort ()

Reads the next attribute in the stream and returns it as a short in the Java programming language.

Returns
`short`	the attribute; if the value is SQL `NULL`, returns `0`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readString

public abstract String readString ()

Reads the next attribute in the stream and returns it as a String in the Java programming language.

Returns
`String`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readTime

public abstract Time readTime ()

Reads the next attribute in the stream and returns it as a java.sql.Time object.

Returns
`Time`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readTimestamp

public abstract Timestamp readTimestamp ()

Reads the next attribute in the stream and returns it as a java.sql.Timestamp object.

Returns
`Timestamp`	the attribute; if the value is SQL `NULL`, returns `null`

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

readURL

public abstract URL readURL ()

Reads an SQL DATALINK value from the stream and returns it as a java.net.URL object in the Java programming language.

Returns
`URL`	a `java.net.URL` object.

Throws
`SQLException`	if a database access error occurs, or if a URL is malformed
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

wasNull

public abstract boolean wasNull ()

Retrieves whether the last value read was SQL NULL.

Returns
`boolean`	`true` if the most recently read SQL value was SQL `NULL`; `false` otherwise

Throws
`SQLException`	if a database access error occurs
`SQLFeatureNotSupportedException`	if the JDBC driver does not support this method

Interfaces

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Most visited

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Results for

SQLInput

Summary

Public methods

Public methods

readArray

readAsciiStream

readBigDecimal

readBinaryStream

readBlob

readBoolean

readByte

readBytes

readCharacterStream

readClob

readDate

readDouble

readFloat

readInt

readLong

readNClob

readNString

readObject

readRef

readRowId

readSQLXML

readShort

readString

readTime

readTimestamp

readURL

wasNull