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 Object
value
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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, 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
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
appendAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId)
Stores a String representation of Expression as EJBQL using a provided PrintWriter.void
appendAsString(Appendable out)
Appends own content as a String to the provided Appendable.boolean
equals(Object o)
protected Object
evaluateNode(Object o)
Evaluates itself with object, pushing result on the stack.protected String
getExpressionOperator(int index)
Object
getValue()
int
hashCode()
void
setValue(Object value)
Expression
shallowCopy()
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:SimpleNode
Evaluates itself with object, pushing result on the stack.- Specified by:
evaluateNode
in classSimpleNode
- Throws:
Exception
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shallowCopy
public Expression shallowCopy()
Creates a copy of this expression node, without copying children.- Specified by:
shallowCopy
in classExpression
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appendAsString
public void appendAsString(Appendable out) throws IOException
Description copied from class:Expression
Appends own content as a String to the provided Appendable.- Overrides:
appendAsString
in 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:Expression
Stores 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:
appendAsEJBQL
in 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:
getExpressionOperator
in classSimpleNode
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equals
public boolean equals(Object o)
- Overrides:
equals
in classExpression
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hashCode
public int hashCode()
- Overrides:
hashCode
in classExpression
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