Copyright (c) 2019 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
    Red Hat Inc. - code modified from SerialVersionDefaultOperation
/*******************************************************************************
 * Copyright (c) 2019 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
 *     Red Hat Inc. - code modified from SerialVersionDefaultOperation
 *******************************************************************************/
package org.eclipse.jdt.internal.corext.fix;

import org.eclipse.core.runtime.Assert;

import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jdt.core.dom.VariableDeclarationFragment;
import org.eclipse.jdt.core.dom.rewrite.ASTRewrite;


Proposal for a default serial version id.
Since:
3.1/**
 * Proposal for a default serial version id.
 *
 * @since 3.1
 */
public final class SerialVersionDefaultOperationCore extends AbstractSerialVersionOperationCore {

	
The initializer linked position group id /** The initializer linked position group id */
	private static final String GROUP_INITIALIZER= "initializer"; //$NON-NLS-1$

	
Creates a new serial version default proposal.
Params:
unit – 
           the compilation unit
nodes – 
           the originally selected nodes/**
	 * Creates a new serial version default proposal.
	 *
	 * @param unit
	 *            the compilation unit
	 * @param nodes
	 *            the originally selected nodes
	 */
	public SerialVersionDefaultOperationCore(ICompilationUnit unit, ASTNode[] nodes) {
		super(unit, nodes);
	}


	@Override
	protected boolean addInitializer(final VariableDeclarationFragment fragment, final ASTNode declarationNode) {
		Assert.isNotNull(fragment);

		final Expression expression= fragment.getAST().newNumberLiteral(DEFAULT_EXPRESSION);
		if (expression != null)
			fragment.setInitializer(expression);
		return true;
	}

	@Override
	protected void addLinkedPositions(final ASTRewrite rewrite, final VariableDeclarationFragment fragment, final LinkedProposalModelCore positionGroups) {

		Assert.isNotNull(rewrite);
		Assert.isNotNull(fragment);

		final Expression initializer= fragment.getInitializer();
		if (initializer != null) {
			LinkedProposalPositionGroupCore group= positionGroups.createPositionGroup(GROUP_INITIALIZER);
			group.addPosition(rewrite.track(initializer), true);
			positionGroups.addPositionGroup(group);
		}
	}

}