Apache Derby Client JDBC Driver 10.17.1.0 · org.apache.derby.client.am.stmtcache.StatementKey

Modifier and Type	Field and Description
private final int	autogeneratedKeys Tells if the associated statement returns auto-generated keys.
private final int	concurrency The result set concurrency for the statement.
private final int	holdability Result set holdability for the statement.
private final boolean	isCallableStatement Tells if the key represents a `CallableStatement`.
private final String	schema The compilation schema for the statement.
private final String	sql The SQL query of the statement.
private final int	type The result set type for the statement.

Access	Constructor and Description
pack-priv	StatementKey(boolean `true` is this is a key for a `java.sql.CallableStatement` isCallableStatement, String SQL query string sql, String compilation schema schema, int result set type rsType, int result set concurrency rsConcurrency, int result set holdability rsHoldability, int if auto-generated keys are returned autogeneratedKeys) Creates a statement key with all the common properties.

Method Summary

Modifier and Type	Method and Description
public boolean	equals(Object the reference object with which to compare. obj) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for the object.
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Inherited from java.lang.Object:: clone finalize getClass notify notifyAll wait wait wait

Field Detail

autogeneratedKeys	back to summary
private final int autogeneratedKeys Tells if the associated statement returns auto-generated keys.

concurrency	back to summary
private final int concurrency The result set concurrency for the statement.

holdability	back to summary
private final int holdability Result set holdability for the statement.

isCallableStatement	back to summary
private final boolean isCallableStatement Tells if the key represents a `CallableStatement`.

schema	back to summary
private final String schema The compilation schema for the statement.

sql	back to summary
private final String sql The SQL query of the statement.

type	back to summary
private final int type The result set type for the statement.

Constructor Detail

StatementKey back to summary

StatementKey	back to summary
pack-priv StatementKey(boolean isCallableStatement, String sql, String schema, int rsType, int rsConcurrency, int rsHoldability, int autogeneratedKeys) Creates a statement key with all the common properties. Parameters isCallableStatement:boolean `true` is this is a key for a `java.sql.CallableStatement` sql:String SQL query string schema:String compilation schema rsType:int result set type rsConcurrency:int result set concurrency rsHoldability:int result set holdability autogeneratedKeys:int if auto-generated keys are returned Exceptions IllegalArgumentException: if `schema` is `null`

pack-priv StatementKey(boolean isCallableStatement, String sql, String schema, int rsType, int rsConcurrency, int rsHoldability, int autogeneratedKeys)

Creates a statement key with all the common properties.

Parameters

isCallableStatement:boolean: true is this is a key for a java.sql.CallableStatement
sql:String: SQL query string
schema:String: compilation schema
rsType:int: result set type
rsConcurrency:int: result set concurrency
rsHoldability:int: result set holdability
autogeneratedKeys:int: if auto-generated keys are returned

Exceptions

IllegalArgumentException:: if schema is null

Method Detail

equals back to summary

equals	back to summary
public boolean equals(Object obj) Overrides java.lang.Object.equals. Doc from java.lang.Object.equals. Indicates whether some other object is "equal to" this one. The `equals` method implements an equivalence relation on non-null object references: It is reflexive: for any non-null reference value `x`, `x.equals(x)` should return `true`. It is symmetric: for any non-null reference values `x` and `y`, `x.equals(y)` should return `true` if and only if `y.equals(x)` returns `true`. It is transitive: for any non-null reference values `x`, `y`, and `z`, if `x.equals(y)` returns `true` and `y.equals(z)` returns `true`, then `x.equals(z)` should return `true`. It is consistent: for any non-null reference values `x` and `y`, multiple invocations of `x.equals(y)` consistently return `true` or consistently return `false`, provided no information used in `equals` comparisons on the objects is modified. For any non-null reference value `x`, `x.equals(null)` should return `false`. An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes. Parameters obj:Object the reference object with which to compare. Returns:boolean `true` if this object is the same as the obj argument; `false` otherwise.

public boolean equals(Object obj)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters

obj:Object: the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.hashCode. Doc from java.lang.Object.hashCode. Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by `java.util.HashMap`. The general contract of `hashCode` is: Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables. Returns:int a hash code value for this object.

public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns:int: a hash code value for this object.

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Doc from java.lang.Object.toString. Returns a string representation of the object. Returns:String a string representation of the object.

toString

back to summary

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object.

Returns:String: a string representation of the object.

public Class StatementKey

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Field Detail

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Method Detail