com.sun.codemodel

Class JBlock

java.lang.Object

com.sun.codemodel.JBlock

All Implemented Interfaces:

JGenerable, JStatement

public final class JBlock
extends Object
implements JGenerable, JStatement

A block of Java code, which may contain statements and local declarations.

JBlock contains a large number of factory methods that creates new statements/declarations. Those newly created statements/declarations are inserted into the "current position". The position advances one every time you add a new instruction.

Constructor Summary

Constructors

Constructor and Description
JBlock()
JBlock(boolean bracesRequired, boolean indentRequired)

Method Summary

Modifier and Type	Method and Description
void	_break() Create a break statement and add it to this block
void	_break(JLabel label)
void	_continue()
void	_continue(JLabel label) Create a continue statement and add it to this block
JDoLoop	_do(JExpression test) Create a Do statement and add it to this block
JForLoop	_for() Create a For statement and add it to this block
JConditional	_if(JExpression expr) Create an If statement and add it to this block
void	_return() Create a return statement and add it to this block
void	_return(JExpression exp) Create a return statement and add it to this block
JSwitch	_switch(JExpression test) Create a switch/case statement and add it to this block
void	_throw(JExpression exp) Create a throw statement and add it to this block
JTryBlock	_try() Create a Try statement and add it to this block
JWhileLoop	_while(JExpression test) Create a While statement and add it to this block
JBlock	add(JStatement s) Adds a statement to this block
JBlock	assign(JAssignmentTarget lhs, JExpression exp) Creates an assignment statement and adds it to this block.
JBlock	assignPlus(JAssignmentTarget lhs, JExpression exp)
JBlock	block() Create a sub-block and add it to this block
JVar	decl(int mods, JType type, String name, JExpression init) Adds a local variable declaration to this block
JVar	decl(JType type, String name) Adds a local variable declaration to this block
JVar	decl(JType type, String name, JExpression init) Adds a local variable declaration to this block
JStatement	directStatement(String source) Creates a "literal" statement directly.
JForEach	forEach(JType varType, String name, JExpression collection) Creates an enhanced For statement based on j2se 1.5 JLS and add it to this block
void	generate(JFormatter f)
List<Object>	getContents() Returns a read-only view of JStatements and JDeclaration in this block.
JInvocation	invoke(JExpression expr, JMethod method) Creates an invocation statement and adds it to this block.
JInvocation	invoke(JExpression expr, String method) Creates an invocation statement and adds it to this block.
JInvocation	invoke(JMethod method) Creates an invocation statement and adds it to this block.
JInvocation	invoke(String method) Creates an invocation statement and adds it to this block.
boolean	isEmpty() Returns true if this block is empty and does not contain any statement.
JLabel	label(String name) Create a label, which can be referenced from continue and break statements.
int	pos() Gets the current position to which new statements will be inserted.
int	pos(int newPos) Sets the current position.
void	state(JFormatter f)
JInvocation	staticInvoke(JClass type, String method) Creates a static invocation statement.

Methods inherited from class java.lang.Object

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

Constructor Detail

JBlock

public JBlock()

JBlock

public JBlock(boolean bracesRequired,
              boolean indentRequired)

Method Detail

getContents

public List<Object> getContents()

Returns a read-only view of JStatements and JDeclaration in this block.

pos

public int pos()

Gets the current position to which new statements will be inserted. For example if the value is 0, newly created instructions will be inserted at the very beginning of the block.

See Also:

pos(int)

pos

public int pos(int newPos)

Sets the current position.

Returns:

the old value of the current position.

Throws:

IllegalArgumentException - if the new position value is illegal.

See Also:

pos()

isEmpty

public boolean isEmpty()

Returns true if this block is empty and does not contain any statement.

decl

public JVar decl(JType type,
                 String name)

Adds a local variable declaration to this block

Parameters:

type - JType of the variable

name - Name of the variable

Returns:

Newly generated JVar

decl

public JVar decl(JType type,
                 String name,
                 JExpression init)

Adds a local variable declaration to this block

Parameters:

type - JType of the variable

name - Name of the variable

init - Initialization expression for this variable. May be null.

Returns:

Newly generated JVar

decl

public JVar decl(int mods,
                 JType type,
                 String name,
                 JExpression init)

Adds a local variable declaration to this block

Parameters:

mods - Modifiers for the variable

type - JType of the variable

name - Name of the variable

init - Initialization expression for this variable. May be null.

Returns:

Newly generated JVar

assign

public JBlock assign(JAssignmentTarget lhs,
                     JExpression exp)

Creates an assignment statement and adds it to this block.

Parameters:

lhs - Assignable variable or field for left hand side of expression

exp - Right hand side expression

assignPlus

public JBlock assignPlus(JAssignmentTarget lhs,
                         JExpression exp)

invoke

public JInvocation invoke(JExpression expr,
                          String method)

Creates an invocation statement and adds it to this block.

Parameters:

expr - JExpression evaluating to the class or object upon which the named method will be invoked

method - Name of method to invoke

Returns:

Newly generated JInvocation

invoke

public JInvocation invoke(JExpression expr,
                          JMethod method)

Creates an invocation statement and adds it to this block.

Parameters:

expr - JExpression evaluating to the class or object upon which the method will be invoked

method - JMethod to invoke

Returns:

Newly generated JInvocation

staticInvoke

public JInvocation staticInvoke(JClass type,
                                String method)

Creates a static invocation statement.

invoke

public JInvocation invoke(String method)

Creates an invocation statement and adds it to this block.

Parameters:

method - Name of method to invoke

Returns:

Newly generated JInvocation

invoke

public JInvocation invoke(JMethod method)

Creates an invocation statement and adds it to this block.

Parameters:

method - JMethod to invoke

Returns:

Newly generated JInvocation

add

public JBlock add(JStatement s)

Adds a statement to this block

Parameters:

s - JStatement to be added

Returns:

This block

_if

public JConditional _if(JExpression expr)

Create an If statement and add it to this block

Parameters:

expr - JExpression to be tested to determine branching

Returns:

Newly generated conditional statement

_for

public JForLoop _for()

Create a For statement and add it to this block

Returns:

Newly generated For statement

_while

public JWhileLoop _while(JExpression test)

Create a While statement and add it to this block

Returns:

Newly generated While statement

_switch

public JSwitch _switch(JExpression test)

Create a switch/case statement and add it to this block

_do

public JDoLoop _do(JExpression test)

Create a Do statement and add it to this block

Returns:

Newly generated Do statement

_try

public JTryBlock _try()

Create a Try statement and add it to this block

Returns:

Newly generated Try statement

_return

public void _return()

Create a return statement and add it to this block

_return

public void _return(JExpression exp)

Create a return statement and add it to this block

_throw

public void _throw(JExpression exp)

Create a throw statement and add it to this block

_break

public void _break()

Create a break statement and add it to this block

_break

public void _break(JLabel label)

label

public JLabel label(String name)

Create a label, which can be referenced from continue and break statements.

_continue

public void _continue(JLabel label)

Create a continue statement and add it to this block

_continue

public void _continue()

block

public JBlock block()

Create a sub-block and add it to this block

directStatement

public JStatement directStatement(String source)

Creates a "literal" statement directly.

Specified string is printed as-is. This is useful as a short-cut.

For example, you can invoke this method as: directStatement("a=b+c;").

generate

public void generate(JFormatter f)

Specified by:

generate in interface JGenerable

forEach

public JForEach forEach(JType varType,
                        String name,
                        JExpression collection)

Creates an enhanced For statement based on j2se 1.5 JLS and add it to this block

Returns:

Newly generated enhanced For statement per j2se 1.5 specification

state

public void state(JFormatter f)

Specified by:

state in interface JStatement