org.aspectj.org.eclipse.jdt.internal.core.CreatePackageDeclarationOperation Maven / Gradle / Ivy

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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.core;

import org.eclipse.core.runtime.IStatus;
import org.aspectj.org.eclipse.jdt.core.ICompilationUnit;
import org.aspectj.org.eclipse.jdt.core.IImportDeclaration;
import org.aspectj.org.eclipse.jdt.core.IJavaElement;
import org.aspectj.org.eclipse.jdt.core.IJavaModelStatus;
import org.aspectj.org.eclipse.jdt.core.IJavaModelStatusConstants;
import org.aspectj.org.eclipse.jdt.core.IJavaProject;
import org.aspectj.org.eclipse.jdt.core.IType;
import org.aspectj.org.eclipse.jdt.core.JavaConventions;
import org.aspectj.org.eclipse.jdt.core.JavaCore;
import org.aspectj.org.eclipse.jdt.core.JavaModelException;
import org.aspectj.org.eclipse.jdt.core.dom.AST;
import org.aspectj.org.eclipse.jdt.core.dom.ASTNode;
import org.aspectj.org.eclipse.jdt.core.dom.CompilationUnit;
import org.aspectj.org.eclipse.jdt.core.dom.Name;
import org.aspectj.org.eclipse.jdt.core.dom.PackageDeclaration;
import org.aspectj.org.eclipse.jdt.core.dom.StructuralPropertyDescriptor;
import org.aspectj.org.eclipse.jdt.core.dom.rewrite.ASTRewrite;
import org.aspectj.org.eclipse.jdt.internal.core.util.Messages;

/**
 * This operation adds/replaces a package declaration in an existing compilation unit.
 * If the compilation unit already includes the specified package declaration,
 * it is not generated (it does not generate duplicates).
 *
 * 
Required Attributes:

 *  Compilation unit element
 *  
Package name
 * 
 */
public class CreatePackageDeclarationOperation extends CreateElementInCUOperation {
	/**
	 * The name of the package declaration being created
	 */
	protected String name = null;
/**
 * When executed, this operation will add a package declaration to the given compilation unit.
 */
public CreatePackageDeclarationOperation(String name, ICompilationUnit parentElement) {
	super(parentElement);
	this.name= name;
}
@Override
protected StructuralPropertyDescriptor getChildPropertyDescriptor(ASTNode parent) {
	return CompilationUnit.PACKAGE_PROPERTY;
}
@Override
protected ASTNode generateElementAST(ASTRewrite rewriter, ICompilationUnit cu) throws JavaModelException {
	//look for an existing package declaration
	IJavaElement[] children = getCompilationUnit().getChildren();
	for (int i = 0; i < children.length; i++) {
		if (children[i].getElementType() ==  IJavaElement.PACKAGE_DECLARATION && this.name.equals(children[i].getElementName())) {
			//equivalent package declaration already exists
			this.creationOccurred = false;
			return null;
		}
	}
	AST ast = this.cuAST.getAST();
	PackageDeclaration pkgDeclaration = ast.newPackageDeclaration();
	Name astName = ast.newName(this.name);
	pkgDeclaration.setName(astName);
	return pkgDeclaration;
}
/**
 * Creates and returns the handle for the element this operation created.
 */
@Override
protected IJavaElement generateResultHandle() {
	return getCompilationUnit().getPackageDeclaration(this.name);
}
/**
 * @see CreateElementInCUOperation#getMainTaskName()
 */
@Override
public String getMainTaskName(){
	return Messages.operation_createPackageProgress;
}
/**
 * Sets the correct position for new package declaration:
 *  before the first import
 * 
 if no imports, before the first type
 * 
 if no type - first thing in the CU
 * 
 */
@Override
protected void initializeDefaultPosition() {
	try {
		ICompilationUnit cu = getCompilationUnit();
		IImportDeclaration[] imports = cu.getImports();
		if (imports.length > 0) {
			createBefore(imports[0]);
			return;
		}
		IType[] types = cu.getTypes();
		if (types.length > 0) {
			createBefore(types[0]);
			return;
		}
	} catch (JavaModelException e) {
		// cu doesn't exist: ignore
	}
}
/**
 * Possible failures: 
 *  NO_ELEMENTS_TO_PROCESS - no compilation unit was supplied to the operation
 *  
INVALID_NAME - a name supplied to the operation was not a valid
 * 		package declaration name.
 * 
 * @see IJavaModelStatus
 * @see JavaConventions
 */
@Override
public IJavaModelStatus verify() {
	IJavaModelStatus status = super.verify();
	if (!status.isOK()) {
		return status;
	}
	IJavaProject project = getParentElement().getJavaProject();
	if (JavaConventions.validatePackageName(this.name, project.getOption(JavaCore.COMPILER_SOURCE, true), project.getOption(JavaCore.COMPILER_COMPLIANCE, true)).getSeverity() == IStatus.ERROR) {
		return new JavaModelStatus(IJavaModelStatusConstants.INVALID_NAME, this.name);
	}
	return JavaModelStatus.VERIFIED_OK;
}
}