com.squareup.javawriter
Class JavaWriter

java.lang.Object
  com.squareup.javawriter.JavaWriter

All Implemented Interfaces:

Closeable

public final class JavaWriter
extends Object
implements Closeable

A utility class which aids in generating Java source files.

Constructor Summary

JavaWriter(Writer out)

Method Summary

JavaWriter	beginControlFlow(String controlFlow)
JavaWriter	beginInitializer(boolean isStatic) Emits an initializer declaration.
JavaWriter	beginMethod(String returnType, String name, int modifiers, List<String> parameters, List<String> throwsTypes) Emit a method declaration.
JavaWriter	beginMethod(String returnType, String name, int modifiers, String... parameters) Emit a method declaration.
JavaWriter	beginType(String type, String kind, int modifiers) Emits a type declaration.
JavaWriter	beginType(String type, String kind, int modifiers, String extendsType, String... implementsTypes) Emits a type declaration.
void	close()
String	compressType(String type) Try to compress a fully-qualified class name to only the class name.
JavaWriter	emitAnnotation(Class<? extends Annotation> annotationType) Equivalent to annotation(annotationType.getName(), emptyMap()).
JavaWriter	emitAnnotation(Class<? extends Annotation> annotationType, Map<String,?> attributes) Equivalent to annotation(annotationType.getName(), attributes).
JavaWriter	emitAnnotation(Class<? extends Annotation> annotationType, Object value) Annotates the next element with annotationType and a value.
JavaWriter	emitAnnotation(String annotation) Equivalent to annotation(annotation, emptyMap()).
JavaWriter	emitAnnotation(String annotation, Map<String,?> attributes) Annotates the next element with annotation and attributes.
JavaWriter	emitAnnotation(String annotation, Object value) Annotates the next element with annotation and a value.
JavaWriter	emitEmptyLine()
JavaWriter	emitEnumValue(String name)
JavaWriter	emitField(String type, String name, int modifiers) Emits a field declaration.
JavaWriter	emitField(String type, String name, int modifiers, String initialValue)
JavaWriter	emitImports(Collection<String> types) Emit an import for each type in the provided Collection.
JavaWriter	emitImports(String... types) Emit an import for each type provided.
JavaWriter	emitJavadoc(String javadoc, Object... params) Emits some Javadoc comments with line separated by \n.
JavaWriter	emitPackage(String packageName) Emit a package declaration and empty line.
JavaWriter	emitSingleLineCOmment(String comment, Object... args) Emits a single line comment.
JavaWriter	emitStatement(String pattern, Object... args)
JavaWriter	emitStaticImports(Collection<String> types) Emit a static import for each type in the provided Collection.
JavaWriter	emitStaticImports(String... types) Emit a static import for each type provided.
JavaWriter	endControlFlow()
JavaWriter	endControlFlow(String controlFlow)
JavaWriter	endInitializer() Ends the current initializer declaration.
JavaWriter	endMethod() Completes the current method declaration.
JavaWriter	endType() Completes the current type declaration.
JavaWriter	nextControlFlow(String controlFlow)
static String	stringLiteral(String data) Returns the string literal representing data, including wrapping quotes.
static String	type(Class<?> raw, String... parameters) Build a string representation of a type and optionally its generic type arguments.

Methods inherited from class java.lang.Object

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

Constructor Detail

JavaWriter

public JavaWriter(Writer out)

Parameters:

out - the stream to which Java source will be written. This should be a buffered stream.

Method Detail

emitPackage

public JavaWriter emitPackage(String packageName)
                       throws IOException

Emit a package declaration and empty line.

Throws:

IOException

emitImports

public JavaWriter emitImports(String... types)
                       throws IOException

Emit an import for each type provided. For the duration of the file, all references to these classes will be automatically shortened.

Throws:

IOException

emitImports

public JavaWriter emitImports(Collection<String> types)
                       throws IOException

Emit an import for each type in the provided Collection. For the duration of the file, all references to these classes will be automatically shortened.

Throws:

IOException

emitStaticImports

public JavaWriter emitStaticImports(String... types)
                             throws IOException

Emit a static import for each type provided. For the duration of the file, all references to these classes will be automatically shortened.

Throws:

IOException

emitStaticImports

public JavaWriter emitStaticImports(Collection<String> types)
                             throws IOException

Emit a static import for each type in the provided Collection. For the duration of the file, all references to these classes will be automatically shortened.

Throws:

IOException

compressType

public String compressType(String type)

Try to compress a fully-qualified class name to only the class name.

beginInitializer

public JavaWriter beginInitializer(boolean isStatic)
                            throws IOException

Emits an initializer declaration.

Parameters:

isStatic - true if it should be an static initializer, false for an instance initializer.

Throws:

IOException

endInitializer

public JavaWriter endInitializer()
                          throws IOException

Ends the current initializer declaration.

Throws:

IOException

beginType

public JavaWriter beginType(String type,
                            String kind,
                            int modifiers)
                     throws IOException

Emits a type declaration.

Parameters:

kind - such as "class", "interface" or "enum".

Throws:

IOException

beginType

public JavaWriter beginType(String type,
                            String kind,
                            int modifiers,
                            String extendsType,
                            String... implementsTypes)
                     throws IOException

Emits a type declaration.

Parameters:

kind - such as "class", "interface" or "enum".

extendsType - the class to extend, or null for no extends clause.

Throws:

IOException

endType

public JavaWriter endType()
                   throws IOException

Completes the current type declaration.

Throws:

IOException

emitField

public JavaWriter emitField(String type,
                            String name,
                            int modifiers)
                     throws IOException

Emits a field declaration.

Throws:

IOException

emitField

public JavaWriter emitField(String type,
                            String name,
                            int modifiers,
                            String initialValue)
                     throws IOException

Throws:

IOException

beginMethod

public JavaWriter beginMethod(String returnType,
                              String name,
                              int modifiers,
                              String... parameters)
                       throws IOException

Emit a method declaration.

Parameters:

returnType - the method's return type, or null for constructors.

name - the method name, or the fully qualified class name for constructors.

parameters - alternating parameter types and names.

Throws:

IOException

beginMethod

public JavaWriter beginMethod(String returnType,
                              String name,
                              int modifiers,
                              List<String> parameters,
                              List<String> throwsTypes)
                       throws IOException

Emit a method declaration.

Parameters:

returnType - the method's return type, or null for constructors.

name - the method name, or the fully qualified class name for constructors.

parameters - alternating parameter types and names.

throwsTypes - the classes to throw, or null for no throws clause.

Throws:

IOException

emitJavadoc

public JavaWriter emitJavadoc(String javadoc,
                              Object... params)
                       throws IOException

Emits some Javadoc comments with line separated by \n.

Throws:

IOException

emitSingleLineCOmment

public JavaWriter emitSingleLineCOmment(String comment,
                                        Object... args)
                                 throws IOException

Emits a single line comment.

Throws:

IOException

emitEmptyLine

public JavaWriter emitEmptyLine()
                         throws IOException

Throws:

IOException

emitEnumValue

public JavaWriter emitEnumValue(String name)
                         throws IOException

Throws:

IOException

emitAnnotation

public JavaWriter emitAnnotation(String annotation)
                          throws IOException

Equivalent to annotation(annotation, emptyMap()).

Throws:

IOException

emitAnnotation

public JavaWriter emitAnnotation(Class<? extends Annotation> annotationType)
                          throws IOException

Equivalent to annotation(annotationType.getName(), emptyMap()).

Throws:

IOException

emitAnnotation

public JavaWriter emitAnnotation(Class<? extends Annotation> annotationType,
                                 Object value)
                          throws IOException

Annotates the next element with annotationType and a value.

Parameters:

value - an object used as the default (value) parameter of the annotation. The value will be encoded using Object.toString(); use stringLiteral(java.lang.String) for String values. Object arrays are written one element per line.

Throws:

IOException

emitAnnotation

public JavaWriter emitAnnotation(String annotation,
                                 Object value)
                          throws IOException

Annotates the next element with annotation and a value.

Parameters:

value - an object used as the default (value) parameter of the annotation. The value will be encoded using Object.toString(); use stringLiteral(java.lang.String) for String values. Object arrays are written one element per line.

Throws:

IOException

emitAnnotation

public JavaWriter emitAnnotation(Class<? extends Annotation> annotationType,
                                 Map<String,?> attributes)
                          throws IOException

Equivalent to annotation(annotationType.getName(), attributes).

Throws:

IOException

emitAnnotation

public JavaWriter emitAnnotation(String annotation,
                                 Map<String,?> attributes)
                          throws IOException

Annotates the next element with annotation and attributes.

Parameters:

attributes - a map from annotation attribute names to their values. Values are encoded using Object.toString(); use stringLiteral(java.lang.String) for String values. Object arrays are written one element per line.

Throws:

IOException

emitStatement

public JavaWriter emitStatement(String pattern,
                                Object... args)
                         throws IOException

Parameters:

pattern - a code pattern like "int i = %s". Newlines will be further indented. Should not contain trailing semicolon.

Throws:

IOException

beginControlFlow

public JavaWriter beginControlFlow(String controlFlow)
                            throws IOException

Parameters:

controlFlow - the control flow construct and its code, such as "if (foo == 5)". Shouldn't contain braces or newline characters.

Throws:

IOException

nextControlFlow

public JavaWriter nextControlFlow(String controlFlow)
                           throws IOException

Parameters:

controlFlow - the control flow construct and its code, such as "else if (foo == 10)". Shouldn't contain braces or newline characters.

Throws:

IOException

endControlFlow

public JavaWriter endControlFlow()
                          throws IOException

Throws:

IOException

endControlFlow

public JavaWriter endControlFlow(String controlFlow)
                          throws IOException

Parameters:

controlFlow - the optional control flow construct and its code, such as "while(foo == 20)". Only used for "do/while" control flows.

Throws:

IOException

endMethod

public JavaWriter endMethod()
                     throws IOException

Completes the current method declaration.

Throws:

IOException

stringLiteral

public static String stringLiteral(String data)

Returns the string literal representing data, including wrapping quotes.

type

public static String type(Class<?> raw,
                          String... parameters)

Build a string representation of a type and optionally its generic type arguments.

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Throws:

IOException