+ * SingleVariableDeclaration:
+ * { Modifier } Type Identifier { [] } [ = Expression ]
+ *
+ * For JLS3, the modifier flags were replaced by
+ * a list of modifier nodes (intermixed with annotations), and the variable arity
+ * indicator was added:
+ *
+ * SingleVariableDeclaration:
+ * { ExtendedModifier } Type [ ... ] Identifier { [] } [ = Expression ]
+ *
+ *
+ * @since 2.0
+ * @noinstantiate This class is not intended to be instantiated by clients.
+ */
+public class SingleVariableDeclaration extends VariableDeclaration {
+
+ /**
+ * The "modifiers" structural property of this node type (JLS2 API only).
+ * @since 3.0
+ */
+ public static final SimplePropertyDescriptor MODIFIERS_PROPERTY =
+ new SimplePropertyDescriptor(SingleVariableDeclaration.class, "modifiers", int.class, MANDATORY); //$NON-NLS-1$
+
+ /**
+ * The "modifiers" structural property of this node type (added in JLS3 API).
+ * @since 3.1
+ */
+ public static final ChildListPropertyDescriptor MODIFIERS2_PROPERTY =
+ new ChildListPropertyDescriptor(SingleVariableDeclaration.class, "modifiers", IExtendedModifier.class, CYCLE_RISK); //$NON-NLS-1$
+
+ /**
+ * The "name" structural property of this node type.
+ * @since 3.0
+ */
+ public static final ChildPropertyDescriptor NAME_PROPERTY =
+ new ChildPropertyDescriptor(SingleVariableDeclaration.class, "name", SimpleName.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$
+
+ /**
+ * The "type" structural property of this node type.
+ * @since 3.0
+ */
+ public static final ChildPropertyDescriptor TYPE_PROPERTY =
+ new ChildPropertyDescriptor(SingleVariableDeclaration.class, "type", Type.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$
+
+ /**
+ * The "varargs" structural property of this node type (added in JLS3 API).
+ * @since 3.1
+ */
+ public static final SimplePropertyDescriptor VARARGS_PROPERTY =
+ new SimplePropertyDescriptor(SingleVariableDeclaration.class, "varargs", boolean.class, MANDATORY); //$NON-NLS-1$
+
+ /**
+ * The "extraDimensions" structural property of this node type.
+ * @since 3.0
+ */
+ public static final SimplePropertyDescriptor EXTRA_DIMENSIONS_PROPERTY =
+ new SimplePropertyDescriptor(SingleVariableDeclaration.class, "extraDimensions", int.class, MANDATORY); //$NON-NLS-1$
+
+ /**
+ * The "initializer" structural property of this node type.
+ * @since 3.0
+ */
+ public static final ChildPropertyDescriptor INITIALIZER_PROPERTY =
+ new ChildPropertyDescriptor(SingleVariableDeclaration.class, "initializer", Expression.class, OPTIONAL, CYCLE_RISK); //$NON-NLS-1$
+
+ /**
+ * A list of property descriptors (element type:
+ * {@link StructuralPropertyDescriptor}),
+ * or null if uninitialized.
+ * @since 3.0
+ */
+ private static final List PROPERTY_DESCRIPTORS_2_0;
+
+ /**
+ * A list of property descriptors (element type:
+ * {@link StructuralPropertyDescriptor}),
+ * or null if uninitialized.
+ * @since 3.1
+ */
+ private static final List PROPERTY_DESCRIPTORS_3_0;
+
+ static {
+ List propertyList = new ArrayList(6);
+ createPropertyList(SingleVariableDeclaration.class, propertyList);
+ addProperty(MODIFIERS_PROPERTY, propertyList);
+ addProperty(TYPE_PROPERTY, propertyList);
+ addProperty(NAME_PROPERTY, propertyList);
+ addProperty(EXTRA_DIMENSIONS_PROPERTY, propertyList);
+ addProperty(INITIALIZER_PROPERTY, propertyList);
+ PROPERTY_DESCRIPTORS_2_0 = reapPropertyList(propertyList);
+
+ propertyList = new ArrayList(7);
+ createPropertyList(SingleVariableDeclaration.class, propertyList);
+ addProperty(MODIFIERS2_PROPERTY, propertyList);
+ addProperty(TYPE_PROPERTY, propertyList);
+ addProperty(VARARGS_PROPERTY, propertyList);
+ addProperty(NAME_PROPERTY, propertyList);
+ addProperty(EXTRA_DIMENSIONS_PROPERTY, propertyList);
+ addProperty(INITIALIZER_PROPERTY, propertyList);
+ PROPERTY_DESCRIPTORS_3_0 = reapPropertyList(propertyList);
+ }
+
+ /**
+ * Returns a list of structural property descriptors for this node type.
+ * Clients must not modify the result.
+ *
+ * @param apiLevel the API level; one of the
+ * AST.JLS* constants
+ * @return a list of property descriptors (element type:
+ * {@link StructuralPropertyDescriptor})
+ * @since 3.0
+ */
+ public static List propertyDescriptors(int apiLevel) {
+ if (apiLevel == AST.JLS2_INTERNAL) {
+ return PROPERTY_DESCRIPTORS_2_0;
+ } else {
+ return PROPERTY_DESCRIPTORS_3_0;
+ }
+ }
+
+ /**
+ * The extended modifiers (element type: IExtendedModifier).
+ * Null in JLS2. Added in JLS3; defaults to an empty list
+ * (see constructor).
+ *
+ * @since 3.1
+ */
+ private ASTNode.NodeList modifiers = null;
+
+ /**
+ * The modifiers; bit-wise or of Modifier flags.
+ * Defaults to none. Not used in 3.0.
+ */
+ private int modifierFlags = Modifier.NONE;
+
+ /**
+ * The variable name; lazily initialized; defaults to a unspecified,
+ * legal Java identifier.
+ */
+ private SimpleName variableName = null;
+
+ /**
+ * The type; lazily initialized; defaults to a unspecified,
+ * legal type.
+ */
+ private Type type = null;
+
+ /**
+ * Indicates the last parameter of a variable arity method;
+ * defaults to false.
+ *
+ * @since 3.1
+ */
+ private boolean variableArity = false;
+
+ /**
+ * The number of extra array dimensions that appear after the variable;
+ * defaults to 0.
+ *
+ * @since 2.1
+ */
+ private int extraArrayDimensions = 0;
+
+ /**
+ * The initializer expression, or null if none;
+ * defaults to none.
+ */
+ private Expression optionalInitializer = null;
+
+ /**
+ * Creates a new AST node for a variable declaration owned by the given
+ * AST. By default, the variable declaration has: no modifiers, an
+ * unspecified (but legal) type, an unspecified (but legal) variable name,
+ * 0 dimensions after the variable; no initializer; not variable arity.
+ * + * N.B. This constructor is package-private. + *
+ * + * @param ast the AST that is to own this node + */ + SingleVariableDeclaration(AST ast) { + super(ast); + if (ast.apiLevel >= AST.JLS3) { + this.modifiers = new ASTNode.NodeList(MODIFIERS2_PROPERTY); + } + } + + /* (omit javadoc for this method) + * Method declared on VariableDeclaration. + * @since 3.1 + */ + final SimplePropertyDescriptor internalExtraDimensionsProperty() { + return EXTRA_DIMENSIONS_PROPERTY; + } + + /* (omit javadoc for this method) + * Method declared on VariableDeclaration. + * @since 3.1 + */ + final ChildPropertyDescriptor internalInitializerProperty() { + return INITIALIZER_PROPERTY; + } + + /* (omit javadoc for this method) + * Method declared on VariableDeclaration. + * @since 3.1 + */ + final ChildPropertyDescriptor internalNameProperty() { + return NAME_PROPERTY; + } + + /* (omit javadoc for this method) + * Method declared on ASTNode. + */ + final List internalStructuralPropertiesForType(int apiLevel) { + return propertyDescriptors(apiLevel); + } + + /* (omit javadoc for this method) + * Method declared on ASTNode. + */ + final int internalGetSetIntProperty(SimplePropertyDescriptor property, boolean get, int value) { + if (property == MODIFIERS_PROPERTY) { + if (get) { + return getModifiers(); + } else { + setModifiers(value); + return 0; + } + } + if (property == EXTRA_DIMENSIONS_PROPERTY) { + if (get) { + return getExtraDimensions(); + } else { + setExtraDimensions(value); + return 0; + } + } + // allow default implementation to flag the error + return super.internalGetSetIntProperty(property, get, value); + } + + /* (omit javadoc for this method) + * Method declared on ASTNode. + */ + final boolean internalGetSetBooleanProperty(SimplePropertyDescriptor property, boolean get, boolean value) { + if (property == VARARGS_PROPERTY) { + if (get) { + return isVarargs(); + } else { + setVarargs(value); + return false; + } + } + // allow default implementation to flag the error + return super.internalGetSetBooleanProperty(property, get, value); + } + + /* (omit javadoc for this method) + * Method declared on ASTNode. + */ + final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) { + if (property == NAME_PROPERTY) { + if (get) { + return getName(); + } else { + setName((SimpleName) child); + return null; + } + } + if (property == TYPE_PROPERTY) { + if (get) { + return getType(); + } else { + setType((Type) child); + return null; + } + } + if (property == INITIALIZER_PROPERTY) { + if (get) { + return getInitializer(); + } else { + setInitializer((Expression) child); + return null; + } + } + // allow default implementation to flag the error + return super.internalGetSetChildProperty(property, get, child); + } + + /* (omit javadoc for this method) + * Method declared on ASTNode. + */ + final List internalGetChildListProperty(ChildListPropertyDescriptor property) { + if (property == MODIFIERS2_PROPERTY) { + return modifiers(); + } + // allow default implementation to flag the error + return super.internalGetChildListProperty(property); + } + + /* (omit javadoc for this method) + * Method declared on ASTNode. + */ + final int getNodeType0() { + return SINGLE_VARIABLE_DECLARATION; + } + + /* (omit javadoc for this method) + * Method declared on ASTNode. + */ + ASTNode clone0(AST target) { + SingleVariableDeclaration result = new SingleVariableDeclaration(target); + result.setSourceRange(this.getStartPosition(), this.getLength()); + if (this.ast.apiLevel == AST.JLS2_INTERNAL) { + result.setModifiers(getModifiers()); + } else { + result.modifiers().addAll(ASTNode.copySubtrees(target, modifiers())); + result.setVarargs(isVarargs()); + } + result.setType((Type) getType().clone(target)); + result.setExtraDimensions(getExtraDimensions()); + result.setName((SimpleName) getName().clone(target)); + result.setInitializer( + (Expression) ASTNode.copySubtree(target, getInitializer())); + return result; + } + + /* (omit javadoc for this method) + * Method declared on ASTNode. + */ + final boolean subtreeMatch0(ASTMatcher matcher, Object other) { + // dispatch to correct overloaded match method + return matcher.match(this, other); + } + + /* (omit javadoc for this method) + * Method declared on ASTNode. + */ + void accept0(ASTVisitor visitor) { + boolean visitChildren = visitor.visit(this); + if (visitChildren) { + // visit children in normal left to right reading order + if (this.ast.apiLevel >= AST.JLS3) { + acceptChildren(visitor, this.modifiers); + } + acceptChild(visitor, getType()); + acceptChild(visitor, getName()); + acceptChild(visitor, getInitializer()); + } + visitor.endVisit(this); + } + + /** + * Returns the live ordered list of modifiers and annotations + * of this declaration (added in JLS3 API). + *+ * Note that the final modifier is the only meaningful modifier for local + * variable and formal parameter declarations. + *
+ * + * @return the live list of modifiers and annotations + * (element type:IExtendedModifier)
+ * @exception UnsupportedOperationException if this operation is used in
+ * a JLS2 AST
+ * @since 3.1
+ */
+ public List modifiers() {
+ // more efficient than just calling unsupportedIn2() to check
+ if (this.modifiers == null) {
+ unsupportedIn2();
+ }
+ return this.modifiers;
+ }
+
+ /**
+ * Returns the modifiers explicitly specified on this declaration.
+ *
+ * In the JLS3 API, this method is a convenience method that
+ * computes these flags from modifiers().
+ *
Modifier constants
+ * @see Modifier
+ */
+ public int getModifiers() {
+ // more efficient than checking getAST().API_LEVEL
+ if (this.modifiers == null) {
+ // JLS2 behavior - bona fide property
+ return this.modifierFlags;
+ } else {
+ // JLS3 behavior - convenient method
+ // performance could be improved by caching computed flags
+ // but this would require tracking changes to this.modifiers
+ int computedModifierFlags = Modifier.NONE;
+ for (Iterator it = modifiers().iterator(); it.hasNext(); ) {
+ Object x = it.next();
+ if (x instanceof Modifier) {
+ computedModifierFlags |= ((Modifier) x).getKeyword().toFlagValue();
+ }
+ }
+ return computedModifierFlags;
+ }
+ }
+
+ /**
+ * Sets the modifiers explicitly specified on this declaration (JLS2 API only).
+ * + * The following modifiers are meaningful for fields: public, private, protected, + * static, final, volatile, and transient. For local variable and formal + * parameter declarations, the only meaningful modifier is final. + *
+ * + * @param modifiers the given modifiers (bit-wise or ofModifier constants)
+ * @exception UnsupportedOperationException if this operation is used in
+ * an AST later than JLS2
+ * @see Modifier
+ * @deprecated In the JLS3 API, this method is replaced by
+ * {@link #modifiers()} which contains a list of a Modifier nodes.
+ */
+ public void setModifiers(int modifiers) {
+ internalSetModifiers(modifiers);
+ }
+
+ /**
+ * Internal synonym for deprecated method. Used to avoid
+ * deprecation warnings.
+ * @since 3.1
+ */
+ /*package*/ final void internalSetModifiers(int pmodifiers) {
+ supportedOnlyIn2();
+ preValueChange(MODIFIERS_PROPERTY);
+ this.modifierFlags = pmodifiers;
+ postValueChange(MODIFIERS_PROPERTY);
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on VariableDeclaration.
+ */
+ public SimpleName getName() {
+ if (this.variableName == null) {
+ // lazy init must be thread-safe for readers
+ synchronized (this) {
+ if (this.variableName == null) {
+ preLazyInit();
+ this.variableName = new SimpleName(this.ast);
+ postLazyInit(this.variableName, NAME_PROPERTY);
+ }
+ }
+ }
+ return this.variableName;
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on VariableDeclaration.
+ */
+ public void setName(SimpleName variableName) {
+ if (variableName == null) {
+ throw new IllegalArgumentException();
+ }
+ ASTNode oldChild = this.variableName;
+ preReplaceChild(oldChild, variableName, NAME_PROPERTY);
+ this.variableName = variableName;
+ postReplaceChild(oldChild, variableName, NAME_PROPERTY);
+ }
+
+ /**
+ * Returns the type of the variable declared in this variable declaration,
+ * exclusive of any extra array dimensions.
+ *
+ * @return the type
+ */
+ public Type getType() {
+ if (this.type == null) {
+ // lazy init must be thread-safe for readers
+ synchronized (this) {
+ if (this.type == null) {
+ preLazyInit();
+ this.type = this.ast.newPrimitiveType(PrimitiveType.INT);
+ postLazyInit(this.type, TYPE_PROPERTY);
+ }
+ }
+ }
+ return this.type;
+ }
+
+ /**
+ * Sets the type of the variable declared in this variable declaration to
+ * the given type, exclusive of any extra array dimensions.
+ *
+ * @param type the new type
+ * @exception IllegalArgumentException if:
+ *
+ * Note that the binding for the type Fooin the vararg method
+ * declaration void fun(Foo... args) is always for the type as
+ * written; i.e., the type binding for Foo. However, if you
+ * navigate from the method declaration to its method binding to the
+ * type binding for its last parameter, the type binding for the vararg
+ * parameter is always an array type (i.e., Foo[]) reflecting
+ * the way vararg methods get compiled.
+ *
true if this is a variable arity parameter declaration,
+ * and false otherwise
+ * @exception UnsupportedOperationException if this operation is used in
+ * a JLS2 AST
+ * @since 3.1
+ */
+ public boolean isVarargs() {
+ // more efficient than just calling unsupportedIn2() to check
+ if (this.modifiers == null) {
+ unsupportedIn2();
+ }
+ return this.variableArity;
+ }
+
+ /**
+ * Sets whether this declaration declares the last parameter of
+ * a variable arity method (added in JLS3 API).
+ *
+ * @param variableArity true if this is a variable arity
+ * parameter declaration, and false otherwise
+ * @since 3.1
+ */
+ public void setVarargs(boolean variableArity) {
+ // more efficient than just calling unsupportedIn2() to check
+ if (this.modifiers == null) {
+ unsupportedIn2();
+ }
+ preValueChange(VARARGS_PROPERTY);
+ this.variableArity = variableArity;
+ postValueChange(VARARGS_PROPERTY);
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on VariableDeclaration.
+ * @since 2.1
+ */
+ public int getExtraDimensions() {
+ return this.extraArrayDimensions;
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on VariableDeclaration.
+ * @since 2.1
+ */
+ public void setExtraDimensions(int dimensions) {
+ if (dimensions < 0) {
+ throw new IllegalArgumentException();
+ }
+ preValueChange(EXTRA_DIMENSIONS_PROPERTY);
+ this.extraArrayDimensions = dimensions;
+ postValueChange(EXTRA_DIMENSIONS_PROPERTY);
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on VariableDeclaration.
+ */
+ public Expression getInitializer() {
+ return this.optionalInitializer;
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on VariableDeclaration.
+ */
+ public void setInitializer(Expression initializer) {
+ // a SingleVariableDeclaration may occur inside an Expression
+ // must check cycles
+ ASTNode oldChild = this.optionalInitializer;
+ preReplaceChild(oldChild, initializer,INITIALIZER_PROPERTY);
+ this.optionalInitializer = initializer;
+ postReplaceChild(oldChild, initializer,INITIALIZER_PROPERTY);
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on ASTNode.
+ */
+ int memSize() {
+ // treat Operator as free
+ return BASE_NODE_SIZE + 7 * 4;
+ }
+
+ /* (omit javadoc for this method)
+ * Method declared on ASTNode.
+ */
+ int treeSize() {
+ return
+ memSize()
+ + (this.modifiers == null ? 0 : this.modifiers.listSize())
+ + (this.type == null ? 0 : getType().treeSize())
+ + (this.variableName == null ? 0 : getName().treeSize())
+ + (this.optionalInitializer == null ? 0 : getInitializer().treeSize());
+ }
+}