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
Fields inherited from class org.apache.cayenne.exp.Expression |
ADD, AND, BETWEEN, BITWISE_AND, BITWISE_LEFT_SHIFT, BITWISE_NOT, BITWISE_OR, BITWISE_RIGHT_SHIFT, BITWISE_XOR, DB_PATH, DIVIDE, EQUAL_TO, FALSE, 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 |
Methods inherited from class org.apache.cayenne.exp.parser.SimpleNode |
appendAsEscapedString, appendChildrenAsEJBQL, appendScalarAsString, connectChildren, encodeAsEJBQL, encodeAsString, evaluate, evaluateChild, expName, flattenTree, getEJBQLExpressionOperator, getOperand, getOperandCount, getPathAliases, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, notExp, pruneNodeForPrunedChild, setOperand, unwrapChild, wrapChild |
Methods inherited from class org.apache.cayenne.exp.Expression |
andExp, andExp, deepCopy, encodeAsXML, equals, expWithParameters, expWithParameters, filter, filterObjects, first, fromString, joinExp, joinExp, match, orExp, orExp, setType, toEJBQL, toString, transform, transformExpression, traverse, traverse |
ASTTrue
public ASTTrue()
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 class SimpleNode
- Throws:
Exception
getExpressionOperator
protected String getExpressionOperator(int index)
- Specified by:
getExpressionOperator
in class SimpleNode
shallowCopy
public Expression shallowCopy()
- Description copied from class:
Expression
- Creates a copy of this expression node, without copying children.
- Specified by:
shallowCopy
in class Expression
getType
public int getType()
- Description copied from class:
Expression
- Returns a type of expression. Most common types are defined as public
static fields of this interface.
- Overrides:
getType
in class Expression
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 class SimpleNode
- Throws:
IOException
- Since:
- 3.2
appendAsEJBQL
public void appendAsEJBQL(Appendable out,
String rootId)
throws IOException
- Description copied from class:
Expression
- Stores a String representation of Expression as EJBQL using a provided
Appendable. DB path expressions produce non-standard EJBQL path
expressions.
- Overrides:
appendAsEJBQL
in class SimpleNode
- Throws:
IOException
- Since:
- 3.2
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