| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.core.dom; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * Local variable declaration statement AST node type. |
| * <p> |
| * This kind of node collects several variable declaration fragments |
| * (<code>VariableDeclarationFragment</code>) into a statement |
| * (<code>Statement</code>), all sharing the same modifiers and base type. |
| * </p> |
| * For JLS2: |
| * <pre> |
| * VariableDeclarationStatement: |
| * { Modifier } Type VariableDeclarationFragment |
| * { <b>,</b> VariableDeclarationFragment } <b>;</b> |
| * </pre> |
| * For JLS3, the modifier flags were replaced by |
| * a list of modifier nodes (intermixed with annotations): |
| * <pre> |
| * VariableDeclarationStatement: |
| * { ExtendedModifier } Type VariableDeclarationFragment |
| * { <b>,</b> VariableDeclarationFragment } <b>;</b> |
| * </pre> |
| * |
| * @since 2.0 |
| */ |
| public class VariableDeclarationStatement extends Statement { |
| |
| /** |
| * The "modifiers" structural property of this node type (JLS2 API only). |
| * @since 3.0 |
| */ |
| // TODO (jeem) When JLS3 support is complete (post 3.0) - deprecated Replaced by {@link #MODIFIERS2_PROPERTY} in the JLS3 API. |
| public static final SimplePropertyDescriptor MODIFIERS_PROPERTY = |
| new SimplePropertyDescriptor(VariableDeclarationStatement.class, "modifiers", int.class, MANDATORY); //$NON-NLS-1$ |
| |
| /** |
| * The "modifiers" structural property of this node type (added in JLS3 API). |
| * @since 3.0 |
| */ |
| public static final ChildListPropertyDescriptor MODIFIERS2_PROPERTY = |
| new ChildListPropertyDescriptor(VariableDeclarationStatement.class, "modifiers", IExtendedModifier.class, CYCLE_RISK); //$NON-NLS-1$ |
| |
| /** |
| * The "type" structural property of this node type. |
| * @since 3.0 |
| */ |
| public static final ChildPropertyDescriptor TYPE_PROPERTY = |
| new ChildPropertyDescriptor(VariableDeclarationStatement.class, "type", Type.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$ |
| |
| /** |
| * The "fragments" structural property of this node type). |
| * @since 3.0 |
| */ |
| public static final ChildListPropertyDescriptor FRAGMENTS_PROPERTY = |
| new ChildListPropertyDescriptor(VariableDeclarationStatement.class, "fragments", VariableDeclarationFragment.class, 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 3.0 |
| */ |
| private static final List PROPERTY_DESCRIPTORS_3_0; |
| |
| static { |
| createPropertyList(VariableDeclarationStatement.class); |
| addProperty(MODIFIERS_PROPERTY); |
| addProperty(TYPE_PROPERTY); |
| addProperty(FRAGMENTS_PROPERTY); |
| PROPERTY_DESCRIPTORS_2_0 = reapPropertyList(); |
| |
| createPropertyList(VariableDeclarationStatement.class); |
| addProperty(MODIFIERS2_PROPERTY); |
| addProperty(TYPE_PROPERTY); |
| addProperty(FRAGMENTS_PROPERTY); |
| PROPERTY_DESCRIPTORS_3_0 = reapPropertyList(); |
| } |
| |
| /** |
| * 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 |
| * <code>AST.JLS*</code> constants |
| |
| * @return a list of property descriptors (element type: |
| * {@link StructuralPropertyDescriptor}) |
| * @since 3.0 |
| */ |
| public static List propertyDescriptors(int apiLevel) { |
| if (apiLevel == AST.JLS2) { |
| return PROPERTY_DESCRIPTORS_2_0; |
| } else { |
| return PROPERTY_DESCRIPTORS_3_0; |
| } |
| } |
| |
| /** |
| * The extended modifiers (element type: <code>IExtendedModifier</code>). |
| * Null in JLS2. Added in JLS3; defaults to an empty list |
| * (see constructor). |
| * @since 3.0 |
| */ |
| private ASTNode.NodeList modifiers = null; |
| |
| /** |
| * The modifier flagss; bit-wise or of Modifier flags. |
| * Defaults to none. Not used in JLS3. |
| */ |
| private int modifierFlags = Modifier.NONE; |
| |
| /** |
| * The base type; lazily initialized; defaults to an unspecified, |
| * legal type. |
| */ |
| private Type baseType = null; |
| |
| /** |
| * The list of variable variable declaration fragments (element type: |
| * <code VariableDeclarationFragment</code>). Defaults to an empty list. |
| */ |
| private ASTNode.NodeList variableDeclarationFragments = |
| new ASTNode.NodeList(FRAGMENTS_PROPERTY); |
| |
| /** |
| * Creates a new unparented local variable declaration statement node owned |
| * by the given AST. By default, the variable declaration has: no modifiers, |
| * an unspecified (but legal) type, and an empty list of variable |
| * declaration fragments (which is syntactically illegal). |
| * <p> |
| * N.B. This constructor is package-private. |
| * </p> |
| * |
| * @param ast the AST that is to own this node |
| */ |
| VariableDeclarationStatement(AST ast) { |
| super(ast); |
| if (ast.apiLevel >= AST.JLS3) { |
| this.modifiers = new ASTNode.NodeList(MODIFIERS2_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; |
| } |
| } |
| // allow default implementation to flag the error |
| return super.internalGetSetIntProperty(property, get, value); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) { |
| if (property == TYPE_PROPERTY) { |
| if (get) { |
| return getType(); |
| } else { |
| setType((Type) 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(); |
| } |
| if (property == FRAGMENTS_PROPERTY) { |
| return fragments(); |
| } |
| // allow default implementation to flag the error |
| return super.internalGetChildListProperty(property); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final int getNodeType0() { |
| return VARIABLE_DECLARATION_STATEMENT; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| ASTNode clone0(AST target) { |
| VariableDeclarationStatement result = |
| new VariableDeclarationStatement(target); |
| result.setSourceRange(this.getStartPosition(), this.getLength()); |
| result.copyLeadingComment(this); |
| if (this.ast.apiLevel == AST.JLS2) { |
| result.setModifiers(getModifiers()); |
| } |
| if (this.ast.apiLevel >= AST.JLS3) { |
| result.modifiers().addAll(ASTNode.copySubtrees(target, modifiers())); |
| } |
| result.setType((Type) getType().clone(target)); |
| result.fragments().addAll( |
| ASTNode.copySubtrees(target, fragments())); |
| 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()); |
| acceptChildren(visitor, this.variableDeclarationFragments); |
| } |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the live ordered list of modifiers and annotations |
| * of this declaration (added in JLS3 API). |
| * <p> |
| * Note that the final modifier is the only meaningful modifier for local |
| * variable declarations. |
| * </p> |
| * |
| * @return the live list of modifiers and annotations |
| * (element type: <code>IExtendedModifier</code>) |
| * @exception UnsupportedOperationException if this operation is used in |
| * a JLS2 AST |
| * @since 3.0 |
| */ |
| 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. |
| * <p> |
| * In the JLS3 API, this method is a convenience method that |
| * computes these flags from <code>modifiers()</code>. |
| * </p> |
| * |
| * @return the bit-wise or of <code>Modifier</code> 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 - convenience 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). |
| * <p> |
| * Note that the final modifier is the only meaningful modifier for local |
| * variable declarations. |
| * </p> |
| * |
| * @param modifiers the given modifiers (bit-wise or of <code>Modifier</code> constants) |
| * @exception UnsupportedOperationException if this operation is used in |
| * an AST later than JLS2 |
| * @see Modifier |
| */ |
| // TODO (jeem) When JLS3 support is complete (post 3.0) - deprecated In the JLS3 API, this method is replaced by <code>modifiers()</code> which contains a list of a <code>Modifier</code> nodes. |
| public void setModifiers(int modifiers) { |
| supportedOnlyIn2(); |
| preValueChange(MODIFIERS_PROPERTY); |
| this.modifierFlags = modifiers; |
| postValueChange(MODIFIERS_PROPERTY); |
| } |
| |
| /** |
| * Returns the base type declared in this variable declaration statement. |
| * <p> |
| * N.B. The individual child variable declaration fragments may specify |
| * additional array dimensions. So the type of the variable are not |
| * necessarily exactly this type. |
| * </p> |
| * |
| * @return the base type |
| */ |
| public Type getType() { |
| if (this.baseType == null) { |
| // lazy init must be thread-safe for readers |
| synchronized (this) { |
| if (this.baseType == null) { |
| preLazyInit(); |
| this.baseType = this.ast.newPrimitiveType(PrimitiveType.INT); |
| postLazyInit(this.baseType, TYPE_PROPERTY); |
| } |
| } |
| } |
| return this.baseType; |
| } |
| |
| /** |
| * Sets the base type declared in this variable declaration statement to |
| * the given type. |
| * |
| * @param type the new base type |
| * @exception IllegalArgumentException if: |
| * <ul> |
| * <li>the node belongs to a different AST</li> |
| * <li>the node already has a parent</li> |
| * </ul> |
| */ |
| public void setType(Type type) { |
| if (type == null) { |
| throw new IllegalArgumentException(); |
| } |
| ASTNode oldChild = this.baseType; |
| preReplaceChild(oldChild, type, TYPE_PROPERTY); |
| this.baseType = type; |
| postReplaceChild(oldChild, type, TYPE_PROPERTY); |
| } |
| |
| /** |
| * Returns the live list of variable declaration fragments in this statement. |
| * Adding and removing nodes from this list affects this node dynamically. |
| * All nodes in this list must be <code>VariableDeclarationFragment</code>s; |
| * attempts to add any other type of node will trigger an |
| * exception. |
| * |
| * @return the live list of variable declaration fragments in this |
| * statement (element type: <code>VariableDeclarationFragment</code>) |
| */ |
| public List fragments() { |
| return this.variableDeclarationFragments; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int memSize() { |
| return super.memSize() + 4 * 4; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int treeSize() { |
| return |
| memSize() |
| + (this.modifiers == null ? 0 : this.modifiers.listSize()) |
| + (this.baseType == null ? 0 : getType().treeSize()) |
| + this.variableDeclarationFragments.listSize(); |
| } |
| } |
| |