Package de.odysseus.el.tree.impl.ast
Class AstNode
- java.lang.Object
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- de.odysseus.el.tree.impl.ast.AstNode
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- All Implemented Interfaces:
ExpressionNode
,Node
- Direct Known Subclasses:
AstEval
,AstIdentifier
,AstMethod
,AstProperty
,AstRightValue
,AstText
public abstract class AstNode extends java.lang.Object implements ExpressionNode
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Constructor Summary
Constructors Constructor Description AstNode()
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Method Summary
All Methods Static Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description abstract void
appendStructure(java.lang.StringBuilder builder, Bindings bindings)
abstract java.lang.Object
eval(Bindings bindings, javax.el.ELContext context)
protected java.lang.reflect.Method
findAccessibleMethod(java.lang.reflect.Method method)
private static java.lang.reflect.Method
findPublicAccessibleMethod(java.lang.reflect.Method method)
Find accessible method.java.lang.String
getStructuralId(Bindings bindings)
Get the canonical expression string for this node.java.lang.Object
getValue(Bindings bindings, javax.el.ELContext context, java.lang.Class<?> type)
evaluate and return the (optionally coerced) result.-
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface de.odysseus.el.tree.ExpressionNode
getMethodInfo, getType, getValueReference, invoke, isLeftValue, isLiteralText, isMethodInvocation, isReadOnly, setValue
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Methods inherited from interface de.odysseus.el.tree.Node
getCardinality, getChild
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Method Detail
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getValue
public final java.lang.Object getValue(Bindings bindings, javax.el.ELContext context, java.lang.Class<?> type)
evaluate and return the (optionally coerced) result.- Specified by:
getValue
in interfaceExpressionNode
- Parameters:
bindings
- bindings containing variables and functionscontext
- evaluation contexttype
- result type- Returns:
- evaluated node, coerced to the expected type
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appendStructure
public abstract void appendStructure(java.lang.StringBuilder builder, Bindings bindings)
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eval
public abstract java.lang.Object eval(Bindings bindings, javax.el.ELContext context)
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getStructuralId
public final java.lang.String getStructuralId(Bindings bindings)
Description copied from interface:ExpressionNode
Get the canonical expression string for this node. Variable and funtion names will be replaced in a way such that two expression nodes that have the same node structure and bindings will also answer the same value here. For example,"${foo:bar()+2*foobar}"
may lead to"${<fn>() + 2 * <var>}"
iffoobar
is a bound variable. Otherwise, the structural id would be"${<fn>() + 2 * foobar}"
. If the bindings isnull
, the full canonical subexpression is returned.- Specified by:
getStructuralId
in interfaceExpressionNode
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findPublicAccessibleMethod
private static java.lang.reflect.Method findPublicAccessibleMethod(java.lang.reflect.Method method)
Find accessible method. Searches the inheritance tree of the class declaring the method until it finds a method that can be invoked.- Parameters:
method
- method- Returns:
- accessible method or
null
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findAccessibleMethod
protected java.lang.reflect.Method findAccessibleMethod(java.lang.reflect.Method method)
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