| /******************************************************************************* |
| * Copyright (c) 2000, 2003 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 declaration AST node type. |
| * |
| * <pre> |
| * ImportDeclaration: |
| * <b>import</b> Name [ <b>.</b> <b>*</b> ] <b>;</b> |
| * </pre> |
| * |
| * @since 2.0 |
| */ |
| public class ImportDeclaration extends ASTNode { |
| /** |
| * The import name; lazily initialized; defaults to a unspecified, |
| * legal Java identifier. |
| */ |
| private Name importName = null; |
| |
| /** |
| * On demand versus single type import; defaults to single type import. |
| */ |
| private boolean onDemand = false; |
| |
| /** |
| * Creates a new AST node for an import declaration owned by the |
| * given AST. The import declaration initially is a single type |
| * import for an unspecified, but legal, Java type name. |
| * <p> |
| * N.B. This constructor is package-private; all subclasses must be |
| * declared in the same package; clients are unable to declare |
| * additional subclasses. |
| * </p> |
| * |
| * @param ast the AST that is to own this node |
| */ |
| ImportDeclaration(AST ast) { |
| super(ast); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| public int getNodeType() { |
| return IMPORT_DECLARATION; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| ASTNode clone(AST target) { |
| ImportDeclaration result = new ImportDeclaration(target); |
| result.setSourceRange(this.getStartPosition(), this.getLength()); |
| result.setOnDemand(isOnDemand()); |
| result.setName((Name) getName().clone(target)); |
| return result; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| public boolean subtreeMatch(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) { |
| acceptChild(visitor, getName()); |
| } |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the name imported by this declaration. |
| * <p> |
| * For an on-demand import, this is the name of a package. For a |
| * single-type import, this is the qualified name of a type. |
| * </p> |
| * |
| * @return the imported name node |
| */ |
| public Name getName() { |
| if (importName == null) { |
| // lazy initialize - use setter to ensure parent link set too |
| long count = getAST().modificationCount(); |
| setName(getAST().newQualifiedName( |
| new SimpleName(getAST()), new SimpleName(getAST()))); |
| getAST().setModificationCount(count); |
| } |
| return importName; |
| } |
| |
| /** |
| * Sets the name of this import declaration to the given name. |
| * <p> |
| * For an on-demand import, this is the name of a package. For a |
| * single-type import, this is the qualified name of a type. |
| * </p> |
| * |
| * @param name the new import name |
| * @exception IllegalArgumentException if: |
| * <ul> |
| * <li>the node belongs to a different AST</li> |
| * <li>the node already has a parent</li> |
| * </ul> |
| */ |
| public void setName(Name name) { |
| if (name == null) { |
| throw new IllegalArgumentException(); |
| } |
| replaceChild(this.importName, name, false); |
| this.importName = name; |
| } |
| |
| /** |
| * Returns whether this import declaration is an on-demand or a |
| * single-type import. |
| * |
| * @return <code>true</code> if this is an on-demand import, |
| * and <code>false</code> if this is a single type import |
| */ |
| public boolean isOnDemand() { |
| return onDemand; |
| } |
| |
| /** |
| * Sets whether this import declaration is an on-demand or a |
| * single-type import. |
| * |
| * @param onDemand <code>true</code> if this is an on-demand import, |
| * and <code>false</code> if this is a single type import |
| */ |
| public void setOnDemand(boolean onDemand) { |
| modifying(); |
| this.onDemand = onDemand; |
| } |
| |
| /** |
| * Resolves and returns the binding for the package or type imported by |
| * this import declaration. |
| * <p> |
| * Note that bindings are generally unavailable unless requested when the |
| * AST is being built. |
| * </p> |
| * |
| * @return the package binding (for on-demand imports) or type binding |
| * (for single-type imports), or <code>null</code> if the binding cannot |
| * be resolved |
| */ |
| public IBinding resolveBinding() { |
| return getAST().getBindingResolver().resolveImport(this); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int memSize() { |
| return BASE_NODE_SIZE + 2 * 4; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int treeSize() { |
| return |
| memSize() |
| + (importName == null ? 0 : getName().treeSize()); |
| } |
| } |
| |