Copyright (c) 2018 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. - copied from SemanticHighlightingReconciler and modified
/*******************************************************************************
 * Copyright (c) 2018 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. - copied from SemanticHighlightingReconciler and modified
 *******************************************************************************/

package org.eclipse.jdt.internal.ui.javaeditor;

import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.BooleanLiteral;
import org.eclipse.jdt.core.dom.CharacterLiteral;
import org.eclipse.jdt.core.dom.ConstructorInvocation;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jdt.core.dom.NumberLiteral;
import org.eclipse.jdt.core.dom.SimpleName;
import org.eclipse.jdt.core.dom.SimpleType;
import org.eclipse.jdt.core.dom.SuperConstructorInvocation;

import org.eclipse.jdt.internal.corext.dom.GenericVisitor;


Collects positions from the AST.
Since:
1.11/**
 * Collects positions from the AST.
 * 
 * @since 1.11
 */
public abstract class PositionCollectorCore extends GenericVisitor {

	/*
	 * @see org.eclipse.jdt.internal.corext.dom.GenericVisitor#visitNode(org.eclipse.jdt.core.dom.ASTNode)
	 */
	@Override
	protected boolean visitNode(ASTNode node) {
		if ((node.getFlags() & ASTNode.MALFORMED) == ASTNode.MALFORMED) {
			retainPositions(node.getStartPosition(), node.getLength());
			return false;
		}
		return true;
	}

	/*
	 * @see org.eclipse.jdt.core.dom.ASTVisitor#visit(org.eclipse.jdt.core.dom.BooleanLiteral)
	 */
	@Override
	public boolean visit(BooleanLiteral node) {
		return visitLiteral(node);
	}

	/*
	 * @see org.eclipse.jdt.core.dom.ASTVisitor#visit(org.eclipse.jdt.core.dom.CharacterLiteral)
	 */
	@Override
	public boolean visit(CharacterLiteral node) {
		return visitLiteral(node);
	}

	/*
	 * @see org.eclipse.jdt.core.dom.ASTVisitor#visit(org.eclipse.jdt.core.dom.NumberLiteral)
	 */
	@Override
	public boolean visit(NumberLiteral node) {
		return visitLiteral(node);
	}

	protected abstract boolean visitLiteral(Expression node);

	/*
	 * @see org.eclipse.jdt.internal.corext.dom.GenericVisitor#visit(org.eclipse.jdt.core.dom.ConstructorInvocation)
	 * @since 3.5
	 */
	@Override
	public abstract boolean visit(ConstructorInvocation node);

	/*
	 * @see org.eclipse.jdt.internal.corext.dom.GenericVisitor#visit(org.eclipse.jdt.core.dom.ConstructorInvocation)
	 * @since 3.5
	 */
	@Override
	public abstract boolean visit(SuperConstructorInvocation node); 

	@Override
	public abstract boolean visit(SimpleType node);

	/*
	 * @see org.eclipse.jdt.core.dom.ASTVisitor#visit(org.eclipse.jdt.core.dom.SimpleName)
	 */
	@Override
	public abstract boolean visit(SimpleName node); 

	
Retain the positions completely contained in the given range.
Params:
offset – The range offset
length – The range length/**
	 * Retain the positions completely contained in the given range.
	 * @param offset The range offset
	 * @param length The range length
	 */
	protected abstract void retainPositions(int offset, int length);
	
}