org.checkerframework.javacutil.trees

Class TreeBuilder

java.lang.Object

org.checkerframework.javacutil.trees.TreeBuilder

Direct Known Subclasses:

CFTreeBuilder

public class TreeBuilder
extends Object

The TreeBuilder permits the creation of new AST Trees using the non-public Java compiler API TreeMaker.

Field Summary

Fields

Modifier and Type	Field and Description
protected Elements	elements
protected ProcessingEnvironment	env
protected com.sun.tools.javac.code.Types	javacTypes
protected com.sun.tools.javac.tree.TreeMaker	maker
protected Types	modelTypes
protected com.sun.tools.javac.util.Names	names
protected com.sun.tools.javac.code.Symtab	symtab

Constructor Summary

Constructors

Constructor and Description
TreeBuilder(ProcessingEnvironment env)

Method Summary

Modifier and Type	Method and Description
ArrayAccessTree	buildArrayAccess(ExpressionTree array, ExpressionTree index) Builds an AST Tree to dereference an array.
MemberSelectTree	buildArrayLengthAccess(ExpressionTree expression) Builds an AST Tree to dereference the length field of an array.
AssignmentTree	buildAssignment(ExpressionTree lhs, ExpressionTree rhs) Builds an AST Tree to assign an RHS expression to an LHS expression.
StatementTree	buildAssignment(VariableTree variable, ExpressionTree expr) Builds an AST Tree to assign an expression to a variable.
BinaryTree	buildBinary(TypeMirror type, Tree.Kind op, ExpressionTree left, ExpressionTree right) Builds an AST Tree to perform a binary operation.
IdentifierTree	buildClassUse(Element elt) Builds an AST Tree to refer to a class name.
MemberSelectTree	buildHasNextMethodAccess(ExpressionTree iteratorExpr) Builds an AST Tree to access the hasNext() method of an iterator.
MemberSelectTree	buildIteratorMethodAccess(ExpressionTree iterableExpr) Builds an AST Tree to access the iterator() method of some iterable expression.
BinaryTree	buildLessThan(ExpressionTree left, ExpressionTree right) Builds an AST Tree to compare two operands with less than.
LiteralTree	buildLiteral(Object value) Builds an AST Tree representing a literal value of primitive or String type.
MethodInvocationTree	buildMethodInvocation(ExpressionTree methodExpr) Builds an AST Tree to call a method designated by the argument expression.
MethodInvocationTree	buildMethodInvocation(ExpressionTree methodExpr, ExpressionTree argExpr) Builds an AST Tree to call a method designated by methodExpr, with one argument designated by argExpr.
NewArrayTree	buildNewArray(TypeMirror componentType, List<ExpressionTree> elems) Builds an AST Tree to create a new array with initializers.
MemberSelectTree	buildNextMethodAccess(ExpressionTree iteratorExpr) Builds an AST Tree to access the next() method of an iterator.
MemberSelectTree	buildPrimValueMethodAccess(Tree expr) Builds an AST Tree to access the *Value() method of a boxed type such as Short or Float, where * is the corresponding primitive type (i.e.
TypeCastTree	buildTypeCast(TypeMirror type, ExpressionTree expr) Builds an AST Tree to cast the type of an expression.
MemberSelectTree	buildValueOfMethodAccess(Tree expr) Builds an AST Tree to access the valueOf() method of boxed type such as Short or Float.
VariableTree	buildVariableDecl(Tree type, String name, Element owner, ExpressionTree initializer) Builds an AST Tree to declare and initialize a variable.
VariableTree	buildVariableDecl(TypeMirror type, String name, Element owner, ExpressionTree initializer) Builds an AST Tree to declare and initialize a variable, with no modifiers.
IdentifierTree	buildVariableUse(VariableTree decl) Builds an AST Tree to refer to a variable.
static com.sun.tools.javac.code.Symbol.MethodSymbol	getValueOfMethod(ProcessingEnvironment env, TypeMirror boxedType) Returns the valueOf method of a boxed type such as Short or Float.
com.sun.tools.javac.tree.JCTree.Tag	kindToTag(Tree.Kind kind) Map public AST Tree.Kinds to internal javac JCTree.Tags.

Methods inherited from class java.lang.Object

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

Field Detail

elements

protected final Elements elements

modelTypes

protected final Types modelTypes

javacTypes

protected final com.sun.tools.javac.code.Types javacTypes

maker

protected final com.sun.tools.javac.tree.TreeMaker maker

names

protected final com.sun.tools.javac.util.Names names

symtab

protected final com.sun.tools.javac.code.Symtab symtab

env

protected final ProcessingEnvironment env

Constructor Detail

TreeBuilder

public TreeBuilder(ProcessingEnvironment env)

Method Detail

buildIteratorMethodAccess

public MemberSelectTree buildIteratorMethodAccess(ExpressionTree iterableExpr)

Builds an AST Tree to access the iterator() method of some iterable expression.

Parameters:

iterableExpr - an expression whose type is a subtype of Iterable

Returns:

a MemberSelectTree that accesses the iterator() method of the expression

buildHasNextMethodAccess

public MemberSelectTree buildHasNextMethodAccess(ExpressionTree iteratorExpr)

Builds an AST Tree to access the hasNext() method of an iterator.

Parameters:

iteratorExpr - an expression whose type is a subtype of Iterator

Returns:

a MemberSelectTree that accesses the hasNext() method of the expression

buildNextMethodAccess

public MemberSelectTree buildNextMethodAccess(ExpressionTree iteratorExpr)

Builds an AST Tree to access the next() method of an iterator.

Parameters:

iteratorExpr - an expression whose type is a subtype of Iterator

Returns:

a MemberSelectTree that accesses the next() method of the expression

buildArrayLengthAccess

public MemberSelectTree buildArrayLengthAccess(ExpressionTree expression)

Builds an AST Tree to dereference the length field of an array.

Parameters:

expression - the array expression whose length is being accessed

Returns:

a MemberSelectTree to dereference the length of the array

buildMethodInvocation

public MethodInvocationTree buildMethodInvocation(ExpressionTree methodExpr)

Builds an AST Tree to call a method designated by the argument expression.

Parameters:

methodExpr - an expression denoting a method with no arguments

Returns:

a MethodInvocationTree to call the argument method

buildMethodInvocation

public MethodInvocationTree buildMethodInvocation(ExpressionTree methodExpr,
                                                  ExpressionTree argExpr)

Builds an AST Tree to call a method designated by methodExpr, with one argument designated by argExpr.

Parameters:

methodExpr - an expression denoting a method with one argument

argExpr - an expression denoting an argument to the method

Returns:

a MethodInvocationTree to call the argument method

buildVariableDecl

public VariableTree buildVariableDecl(TypeMirror type,
                                      String name,
                                      Element owner,
                                      ExpressionTree initializer)

Builds an AST Tree to declare and initialize a variable, with no modifiers.

Parameters:

type - the type of the variable

name - the name of the variable

owner - the element containing the new symbol

initializer - the initializer expression

Returns:

a VariableDeclTree declaring the new variable

buildVariableDecl

public VariableTree buildVariableDecl(Tree type,
                                      String name,
                                      Element owner,
                                      ExpressionTree initializer)

Builds an AST Tree to declare and initialize a variable. The type of the variable is specified by a Tree.

Parameters:

type - the type of the variable, as a Tree

name - the name of the variable

owner - the element containing the new symbol

initializer - the initializer expression

Returns:

a VariableDeclTree declaring the new variable

buildVariableUse

public IdentifierTree buildVariableUse(VariableTree decl)

Builds an AST Tree to refer to a variable.

Parameters:

decl - the declaration of the variable

Returns:

an IdentifierTree to refer to the variable

buildTypeCast

public TypeCastTree buildTypeCast(TypeMirror type,
                                  ExpressionTree expr)

Builds an AST Tree to cast the type of an expression.

Parameters:

type - the type to cast to

expr - the expression to be cast

Returns:

a cast of the expression to the type

buildAssignment

public StatementTree buildAssignment(VariableTree variable,
                                     ExpressionTree expr)

Builds an AST Tree to assign an expression to a variable.

Parameters:

variable - the declaration of the variable to assign to

expr - the expression to be assigned

Returns:

a statement assigning the expression to the variable

buildAssignment

public AssignmentTree buildAssignment(ExpressionTree lhs,
                                      ExpressionTree rhs)

Builds an AST Tree to assign an RHS expression to an LHS expression.

Parameters:

lhs - the expression to be assigned to

rhs - the expression to be assigned

Returns:

a statement assigning the expression to the variable

buildLiteral

public LiteralTree buildLiteral(Object value)

Builds an AST Tree representing a literal value of primitive or String type.

buildLessThan

public BinaryTree buildLessThan(ExpressionTree left,
                                ExpressionTree right)

Builds an AST Tree to compare two operands with less than.

Parameters:

left - the left operand tree

right - the right operand tree

Returns:

a Tree representing "left < right"

buildArrayAccess

public ArrayAccessTree buildArrayAccess(ExpressionTree array,
                                        ExpressionTree index)

Builds an AST Tree to dereference an array.

Parameters:

array - the array to dereference

index - the index at which to dereference

Returns:

a Tree representing the dereference

buildClassUse

public IdentifierTree buildClassUse(Element elt)

Builds an AST Tree to refer to a class name.

Parameters:

elt - an element representing the class

Returns:

an IdentifierTree referring to the class

buildValueOfMethodAccess

public MemberSelectTree buildValueOfMethodAccess(Tree expr)

Builds an AST Tree to access the valueOf() method of boxed type such as Short or Float.

Parameters:

expr - an expression whose type is a boxed type

Returns:

a MemberSelectTree that accesses the valueOf() method of the expression

getValueOfMethod

public static com.sun.tools.javac.code.Symbol.MethodSymbol getValueOfMethod(ProcessingEnvironment env,
                                                                            TypeMirror boxedType)

Returns the valueOf method of a boxed type such as Short or Float.

buildPrimValueMethodAccess

public MemberSelectTree buildPrimValueMethodAccess(Tree expr)

Builds an AST Tree to access the *Value() method of a boxed type such as Short or Float, where * is the corresponding primitive type (i.e. shortValue or floatValue).

Parameters:

expr - an expression whose type is a boxed type

Returns:

a MemberSelectTree that accesses the *Value() method of the expression

kindToTag

public com.sun.tools.javac.tree.JCTree.Tag kindToTag(Tree.Kind kind)

Map public AST Tree.Kinds to internal javac JCTree.Tags.

buildBinary

public BinaryTree buildBinary(TypeMirror type,
                              Tree.Kind op,
                              ExpressionTree left,
                              ExpressionTree right)

Builds an AST Tree to perform a binary operation.

Parameters:

type - result type of the operation

op - AST Tree operator

left - the left operand tree

right - the right operand tree

Returns:

a Tree representing "left < right"

buildNewArray

public NewArrayTree buildNewArray(TypeMirror componentType,
                                  List<ExpressionTree> elems)

Builds an AST Tree to create a new array with initializers.

Parameters:

componentType - component type of the new array

elems - expression trees of initializers

Returns:

a NewArrayTree to create a new array with initializers