Package org.apache.cayenne.exp.parser
Class ASTScalar
- java.lang.Object
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- org.apache.cayenne.exp.Expression
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- org.apache.cayenne.exp.parser.SimpleNode
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- org.apache.cayenne.exp.parser.ASTScalar
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- All Implemented Interfaces:
Serializable,Node,XMLSerializable
- Direct Known Subclasses:
ASTEnum,ASTNamedParameter
public class ASTScalar extends SimpleNode
A scalar value wrapper expression.- Since:
- 1.1
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected Objectvalue-
Fields inherited from class org.apache.cayenne.exp.parser.SimpleNode
children, id, parent
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Fields 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, 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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Method Summary
All Methods Instance Methods Concrete Methods Modifier 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.booleanequals(Object o)protected ObjectevaluateNode(Object o)Evaluates itself with object, pushing result on the stack.protected StringgetExpressionOperator(int index)ObjectgetValue()inthashCode()voidsetValue(Object value)ExpressionshallowCopy()Creates a copy of this expression node, without copying children.-
Methods 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, jjtSetParent, notExp, pruneNodeForPrunedChild, setOperand, unwrapChild, wrapChild
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Methods inherited from class org.apache.cayenne.exp.Expression
andExp, andExp, deepCopy, encodeAsXML, filter, filterObjects, first, getType, joinExp, joinExp, match, orExp, orExp, params, params, paramsArray, setType, toEJBQL, toEJBQL, toString, transform, transformExpression, traverse, traverse
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Field Detail
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value
protected Object value
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Constructor Detail
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ASTScalar
public ASTScalar()
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ASTScalar
public ASTScalar(Object value)
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Method Detail
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evaluateNode
protected Object evaluateNode(Object o) throws Exception
Description copied from class:SimpleNodeEvaluates itself with object, pushing result on the stack.- Specified by:
evaluateNodein classSimpleNode- Throws:
Exception
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shallowCopy
public Expression shallowCopy()
Creates a copy of this expression node, without copying children.- Specified by:
shallowCopyin classExpression
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appendAsString
public void appendAsString(Appendable out) throws IOException
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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setValue
public void setValue(Object value)
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getValue
public Object getValue()
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getExpressionOperator
protected String getExpressionOperator(int index)
- Specified by:
getExpressionOperatorin classSimpleNode
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equals
public boolean equals(Object o)
- Overrides:
equalsin classExpression
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hashCode
public int hashCode()
- Overrides:
hashCodein classExpression
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