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
public class ASTTrue extends ConditionNode
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:
- ASTFalse, Serialized Form
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Field SummaryFields inherited from class org.apache.cayenne.exp.parser.SimpleNodechildren, id, parentFields inherited from class org.apache.cayenne.exp.ExpressionADD, AND, ASTERISK, BETWEEN, BITWISE_AND, BITWISE_LEFT_SHIFT, BITWISE_NOT, BITWISE_OR, BITWISE_RIGHT_SHIFT, BITWISE_XOR, DB_PATH, DIVIDE, EQUAL_TO, 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_IN, NOT_LIKE, NOT_LIKE_IGNORE_CASE, OBJ_PATH, OR, PRUNED_NODE, SUBTRACT, TRUE, type
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Constructor SummaryConstructors Constructor Description ASTTrue()
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Method SummaryModifier and Type Method Description voidappendAsEJBQL(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 intgetRequiredChildrenCount()intgetType()Returns a type of expression.ExpressionshallowCopy()Creates a copy of this expression node, without copying children.Methods inherited from class org.apache.cayenne.exp.parser.ConditionNodeevaluateNode, jjtSetParentMethods inherited from class org.apache.cayenne.exp.parser.SimpleNodeappendAsEJBQL, 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.ExpressionandExp, 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- 
ASTTruepublic ASTTrue()
 
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Method Details- 
getRequiredChildrenCountprotected int getRequiredChildrenCount()- Specified by:
- getRequiredChildrenCountin class- ConditionNode
 
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evaluateSubNode- Specified by:
- evaluateSubNodein class- ConditionNode
- Throws:
- Exception
 
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getExpressionOperator- Specified by:
- getExpressionOperatorin class- SimpleNode
 
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shallowCopyDescription copied from class:ExpressionCreates a copy of this expression node, without copying children.- Specified by:
- shallowCopyin class- Expression
 
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getTypepublic 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 class- Expression
 
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appendAsStringDescription copied from class:ExpressionAppends own content as a String to the provided Appendable.- Overrides:
- appendAsStringin class- SimpleNode
- Throws:
- IOException
- Since:
- 4.0
 
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appendAsEJBQLpublic void appendAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId) throws IOExceptionDescription 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 class- SimpleNode
- Throws:
- IOException
- Since:
- 4.0
 
 
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