Package org.apache.cayenne.exp.parser
Class ASTTrue
java.lang.Object
org.apache.cayenne.exp.Expression
org.apache.cayenne.exp.parser.SimpleNode
org.apache.cayenne.exp.parser.ConditionNode
org.apache.cayenne.exp.parser.ASTTrue
- All Implemented Interfaces:
Serializable,Node,XMLSerializable
Boolean true expression element Notice that there is one ASTTrue and one
ASTFalse instead of a ASTBoolean with a Boolean value. The main reason for
doing this is that a common ASTBoolean will have operand count of 1 and that
will default to a prepared statmenet like " where ? and (...)", but we only
need " where true and (...)".
- Since:
- 3.0
- See Also:
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Field Summary
Fields inherited from class org.apache.cayenne.exp.parser.SimpleNode
children, id, parentFields inherited from class org.apache.cayenne.exp.Expression
ADD, AND, ASTERISK, BETWEEN, BITWISE_AND, BITWISE_LEFT_SHIFT, BITWISE_NOT, BITWISE_OR, BITWISE_RIGHT_SHIFT, BITWISE_XOR, CUSTOM_OP, DB_PATH, DBID_PATH, DIVIDE, ENCLOSING_OBJECT, EQUAL_TO, EXISTS, FALSE, FULL_OBJECT, FUNCTION_CALL, GREATER_THAN, GREATER_THAN_EQUAL_TO, IN, LESS_THAN, LESS_THAN_EQUAL_TO, LIKE, LIKE_IGNORE_CASE, LIST, MULTIPLY, NEGATIVE, NOT, NOT_BETWEEN, NOT_EQUAL_TO, NOT_EXISTS, NOT_IN, NOT_LIKE, NOT_LIKE_IGNORE_CASE, OBJ_PATH, OR, PRUNED_NODE, SUBQUERY, SUBTRACT, TRUE, type -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoidappendAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId) Stores a String representation of Expression as EJBQL using a provided PrintWriter.voidappendAsString(Appendable out) Appends own content as a String to the provided Appendable.protected BooleanevaluateSubNode(Object o, Object[] evaluatedChildren) protected StringgetExpressionOperator(int index) protected intintgetType()Returns a type of expression.Creates a copy of this expression node, without copying children.Methods inherited from class org.apache.cayenne.exp.parser.ConditionNode
evaluateNode, jjtSetParentMethods inherited from class org.apache.cayenne.exp.parser.SimpleNode
appendAsEJBQL, appendAsEscapedString, appendChildrenAsEJBQL, appendScalarAsString, connectChildren, encodeScalarAsEJBQL, evaluate, evaluateChild, expName, flattenTree, getEJBQLExpressionOperator, getOperand, getOperandCount, getPathAliases, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, notExp, pruneNodeForPrunedChild, setOperand, unwrapChild, wrapChildMethods inherited from class org.apache.cayenne.exp.Expression
andExp, andExp, deepCopy, encodeAsXML, equals, filter, filterObjects, first, hashCode, joinExp, joinExp, match, orExp, orExp, params, params, paramsArray, setType, toEJBQL, toEJBQL, toString, transform, transformExpression, traverse, traverse
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Constructor Details
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ASTTrue
public ASTTrue()
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Method Details
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getRequiredChildrenCount
protected int getRequiredChildrenCount()- Specified by:
getRequiredChildrenCountin classConditionNode
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evaluateSubNode
- Specified by:
evaluateSubNodein classConditionNode- Throws:
Exception
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getExpressionOperator
- Specified by:
getExpressionOperatorin classSimpleNode
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shallowCopy
Description copied from class:ExpressionCreates a copy of this expression node, without copying children.- Specified by:
shallowCopyin classExpression
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getType
public int getType()Description copied from class:ExpressionReturns a type of expression. Most common types are defined as public static fields of this interface.- Overrides:
getTypein classExpression
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appendAsString
Description copied from class:ExpressionAppends own content as a String to the provided Appendable.- Overrides:
appendAsStringin classSimpleNode- Throws:
IOException- Since:
- 4.0
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appendAsEJBQL
public void appendAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId) throws IOException Description copied from class:ExpressionStores a String representation of Expression as EJBQL using a provided PrintWriter. DB path expressions produce non-standard EJBQL path expressions. If the parameterAccumulator is supplied then as the EJBQL is output, it may load parameters into this list. In this case, the EJBQL output will contain reference to positional parameters. If no parameterAccumulator is supplied and a scalar type is encountered for which there is no EJBQL literal representation (such as dates) then this method will throw a runtime exception to indicate that it was not possible to generate a string-only representation of the Expression in EJBQL.- Overrides:
appendAsEJBQLin classSimpleNode- Throws:
IOException- Since:
- 4.0
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