JDBCExpressionFactory (OpenJPA Parent POM 2.1.0 API)

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org.apache.openjpa.jdbc.kernel.exps
Class JDBCExpressionFactory

java.lang.Object
  org.apache.openjpa.jdbc.kernel.exps.JDBCExpressionFactory

All Implemented Interfaces:: Serializable, ExpressionFactory

public class JDBCExpressionFactory
extends Object
implements ExpressionFactory, Serializable
extends Object
implements ExpressionFactory, Serializable

Expression factory implementation that can be used to execute queries via SQL.

Author:: Abe White
See Also:: Serialized Form

Constructor Summary
`JDBCExpressionFactory(ClassMapping type)` Constructor.

Method Summary

Value abs(Value val)
Return a value representing the absolute value of the given one.

Value add(Value v1, Value v2)
Return a value representing the two values added together.

Value all(Value val)
Return an expression representing the given condition.

Expression and(Expression exp1, Expression exp2)
Return the two expressions AND'd together.

Value any(Value val)
Return an expression representing the given condition.

Expression asExpression(Value v)
Return the given value as an expression.

Value avg(Value val)
Return the average of the given value for all matches.

Expression bindKeyVariable(Value var, Value val)
Bind the given variable to the key set of the given map value.

Expression bindValueVariable(Value var, Value val)
Bind the given variable to the value set of the given map value.

Expression bindVariable(Value var, Value val)
Bind the given variable to the given collection value.

Value cast(Value val, Class cls)
Cast the value to the given class.

Value coalesceExpression(Value[] vals)
Return a coalesce expression

Value concat(Value v1, Value v2)
Return a value representing the concatenation of the given target with the given args.

Expression contains(Value map, Value arg)
Return an expression representing the given condition.

Expression containsKey(Value map, Value arg)
Return an expression representing the given condition.

Expression containsValue(Value map, Value arg)
Return an expression representing the given condition.

Value count(Value val)
Return the count of the given value for all matches.

Value distinct(Value val)
Return distinct values of the given value.

Value divide(Value v1, Value v2)
Return a value representing the first value divided by the first one.

Expression emptyExpression()
Return a blank expression; this is used when the filter is empty.

Expression endsWith(Value v1, Value v2)
Return whether the first string ends with the second.

Expression equal(Value v1, Value v2)
Return an expression representing the given condition.

Value generalCaseExpression(Expression[] exp, Value val)
Return a general case expression





<T extends Date> 


Value

getCurrentDate(Class<T> dateType)
Return a value representing the current date.





<T extends Date> 


Value

getCurrentTime(Class<T> dateType)
Return a value representing the current time.





<T extends Date> 


Value

getCurrentTimestamp(Class<T> dateType)
Return a value representing the current timestamp.

Value getKey(Value val)
Path navigation thru map key

Value getMapValue(Value map, Value arg)
Return an expression representing the given condition.

Value getNull()
Return a value representing null.

Value getObjectId(Value val)
Return the object id of the given value.

SelectConstructor getSelectConstructor()
Use to create SQL select.

Value getThis()
Return a value representing this.

Expression greaterThan(Value v1, Value v2)
Return an expression representing the given condition.

Expression greaterThanEqual(Value v1, Value v2)
Return an expression representing the given condition.

Value index(Value val)
Return an index/position of the given value within a collection/map.

Value indexOf(Value v1, Value v2)
Return a value representing the String.indexOf(int) function on the given target with the given args.

Expression isEmpty(Value val)
Return an expression representing the given condition.

Expression isInstance(Value val, Class c)
Return whether the first value is an instance of the given class.

Expression isNotEmpty(Value val)
Return an expression representing the given condition.

boolean isVerticalType(Value val)
Return true if the Value is a Type expression and the Type uses joined table strategy.

Expression lessThan(Value v1, Value v2)
Return an expression representing the given condition.

Expression lessThanEqual(Value v1, Value v2)
Return an expression representing the given condition.

Value mapEntry(Value key, Value val)
Return the map entry of the given value.

Value mapKey(Value key, Value val)
Return the map key of the given value

Expression matches(Value v1, Value v2, String single, String multi, String esc)
Return whether the string matches the matching pattern.

Value max(Value val)
Return the max of the given value for all matches.

Value min(Value val)
Return the max of the given value for all matches.

Value mod(Value v1, Value v2)
Return a value representing the first value mod'd by the second one.

Value multiply(Value v1, Value v2)
Return a value representing the two values multiplied together.

Value newAggregate(AggregateListener listener, Value arg)
Return the value of the given function.

Arguments newArgumentList(Value... vs)
Return a function argument list consisting of the given values, any of which may itself be an argument list.

Arguments newArgumentList(Value v1, Value v2)
Return a function argument list consisting of the given values, either of which may itself be an argument list.

Value newBoundVariable(String name, Class type)
This method will be called only once per variable bound in a contains clause, and the returned value will be reused for any further instances of the variable in subexpression of the filter string.

Parameter newCollectionValuedParameter(Object key, Class type)
Return a value representing a collection-valued parameter.

Value newExtension(FilterListener listener, Value target, Value arg)
Return the value of the given extension.

Value newFunction(String functionName, Class<?> resultType, Value... args)
Return a value representing the given datastore function with the given arguments.

Literal newLiteral(Object val, int ptype)
Return a value representing the given constant, which will be a Number, String, or Boolean instance.

Parameter newParameter(Object name, Class type)
Return a value representing a parameter for the given value.

Path newPath()
Return a value representing a path which will consist of a chain of 1 or more field names starting in the namespace of the candidate class.
Example: parent.address.city

Path newPath(Value val)
Return a value representing a path which will consist of a chain of 1 or more field names starting in the namespace of the given value.
Example: var.address.city

Subquery newSubquery(ClassMetaData candidate, boolean subs, String alias)
Return a subquery.

Literal newTypeLiteral(Object val, int ptype)
Return a value representing the given constant, which will be a Number, String, or Boolean instance.

Value newUnboundVariable(String name, Class type)
Return an unbound variable.

Expression not(Expression exp)
Return the inverse of this expression.

Expression notEqual(Value v1, Value v2)
Return an expression representing the given condition.

Expression notMatches(Value v1, Value v2, String single, String multi, String esc)
Return whether the string does not match the given pattern.

Value nullIfExpression(Value val1, Value val2)
Return a nullif expression

Expression or(Expression exp1, Expression exp2)
Return the two expressions OR'd together.

void setBooleanLiteralAsNumeric(boolean isBooleanLiteralAsNumeric)

Value simpleCaseExpression(Value caseOperand, Expression[] exp, Value val1)
Return a simple case expression

Value size(Value val)
Return an expression representing the given condition.

Value sqrt(Value val)
Return the square root of the given value.

Expression startsWith(Value v1, Value v2)
Return whether the first string starts with the second.

Value stringLength(Value str)
Returns the number of characters in the String value.

Value substring(Value v1, Value v2)
Return a value representing the String.substring(int) function on the given target with the given args.

Value subtract(Value v1, Value v2)
Return a value representing the second value subtracted from the first.

Value sum(Value val)
Return the max of the given value for all matches.

Value toLowerCase(Value val)
Return the upper case of the given value.

Value toUpperCase(Value val)
Return the upper case of the given value.

Value trim(Value str, Value trimChar, Boolean where)
Trims the specified specified trimChar from the specified value.

Value type(Value val)
Return the type/class of the given value.

Expression whenCondition(Expression exp, Value val)
Return a when condidional clause

Expression whenScalar(Value val1, Value val2)
Return a when scalar_expression clause

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

JDBCExpressionFactory

public JDBCExpressionFactory(ClassMapping type)

Constructor. Supply the type we're querying against.

Method Detail

setBooleanLiteralAsNumeric

public void setBooleanLiteralAsNumeric(boolean isBooleanLiteralAsNumeric)

getSelectConstructor

public SelectConstructor getSelectConstructor()

Use to create SQL select.