org.springframework.expression.spel.ast
Class ConstructorReference

java.lang.Object
  org.antlr.runtime.tree.BaseTree
      org.antlr.runtime.tree.CommonTree
          org.springframework.expression.spel.ast.SpelNodeImpl
              org.springframework.expression.spel.ast.ConstructorReference

All Implemented Interfaces:

java.io.Serializable, org.antlr.runtime.tree.Tree, SpelNode

public class ConstructorReference
extends SpelNodeImpl

Represents the invocation of a constructor. Either a constructor on a regular type or construction of an array. When an array is constructed, an initializer can be specified.

Examples:
new String('hello world')
new int[]{1,2,3,4}
new int[3] new int[3]{1,2,3}

Since:

3.0

Author:

Andy Clement, Juergen Hoeller

See Also:

Serialized Form

Field Summary

Fields inherited from class org.antlr.runtime.tree.CommonTree

startIndex, stopIndex, token

Fields inherited from class org.antlr.runtime.tree.BaseTree

children

Fields inherited from interface org.antlr.runtime.tree.Tree

INVALID_NODE

Constructor Summary

ConstructorReference(org.antlr.runtime.Token payload, boolean isArrayConstructor)

Method Summary

protected ConstructorExecutor	findExecutorForConstructor(java.lang.String typename, java.lang.Class<?>[] argumentTypes, ExpressionState state) Go through the list of registered constructor resolvers and see if any can find a constructor that takes the specified set of arguments.
java.lang.Object	getValueInternal(ExpressionState state) Implements getValue() - delegating to the code for building an array or a simple type.
boolean	isWritable(ExpressionState expressionState) Determine if this expression node will support a setValue() call.
java.lang.String	toStringAST()

Methods inherited from class org.springframework.expression.spel.ast.SpelNodeImpl

getChild, getObjectClass, getStartPosition, getTokenName, getValue, getValue, setValue

Methods inherited from class org.antlr.runtime.tree.CommonTree

dupNode, getCharPositionInLine, getLine, getText, getToken, getTokenStartIndex, getTokenStopIndex, getType, isNil, setTokenStartIndex, setTokenStopIndex, toString

Methods inherited from class org.antlr.runtime.tree.BaseTree

addChild, addChildren, createChildrenList, deleteChild, dupTree, getChildCount, getFirstChildWithType, setChild, toStringTree

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.springframework.expression.spel.SpelNode

getChildCount

Constructor Detail

ConstructorReference

public ConstructorReference(org.antlr.runtime.Token payload,
                            boolean isArrayConstructor)

Method Detail

getValueInternal

public java.lang.Object getValueInternal(ExpressionState state)
                                  throws EvaluationException

Implements getValue() - delegating to the code for building an array or a simple type.

Specified by:

getValueInternal in class SpelNodeImpl

Throws:

EvaluationException

toStringAST

public java.lang.String toStringAST()

Specified by:

toStringAST in interface SpelNode

Specified by:

toStringAST in class SpelNodeImpl

Returns:

the string form of this AST node

isWritable

public boolean isWritable(ExpressionState expressionState)
                   throws SpelException

Description copied from interface: SpelNode

Determine if this expression node will support a setValue() call.

Specified by:

isWritable in interface SpelNode

Overrides:

isWritable in class SpelNodeImpl

Parameters:

expressionState - the current expression state (includes the context)

Returns:

true if the expression node will allow setValue()

Throws:

SpelException

findExecutorForConstructor

protected ConstructorExecutor findExecutorForConstructor(java.lang.String typename,
                                                         java.lang.Class<?>[] argumentTypes,
                                                         ExpressionState state)
                                                  throws SpelException

Go through the list of registered constructor resolvers and see if any can find a constructor that takes the specified set of arguments.

Parameters:

typename - the type trying to be constructed

argumentTypes - the types of the arguments supplied that the constructor must take

state - the current state of the expression

Returns:

a reusable ConstructorExecutor that can be invoked to run the constructor or null

Throws:

SpelException - if there is a problem locating the constructor