Copyright (c) 2000, 2016 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
/*******************************************************************************
 * Copyright (c) 2000, 2016 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.eclipse.jdt.internal.corext.refactoring.typeconstraints.types;

import org.eclipse.jdt.core.dom.ITypeBinding;


public abstract class AbstractTypeVariable extends TType {

	protected TType[] fBounds;

	protected AbstractTypeVariable(TypeEnvironment environment) {
		super(environment);
	}

	@Override
	protected void initialize(ITypeBinding binding) {
		super.initialize(binding);
		ITypeBinding[] bounds= binding.getTypeBounds();
		if (bounds.length == 0) {
			fBounds= EMPTY_TYPE_ARRAY;
			if (getEnvironment().getJavaLangObject() == null) {
				getEnvironment().initializeJavaLangObject(binding.getErasure());
			}
		} else {
			fBounds= new TType[bounds.length];
			for (int i= 0; i < bounds.length; i++) {
				fBounds[i]= getEnvironment().create(bounds[i]);
			}
		}
	}

	@Override
	public TType getErasure() {
		if (fBounds.length == 0)
			return getEnvironment().getJavaLangObject();
		return fBounds[0].getErasure();
	}

	/* package */ final boolean isUnbounded() {
		if (fBounds.length == 0)
			return true;
		return fBounds[0].isJavaLangObject();
	}

	public final TType[] getBounds() {
		return fBounds.clone();
	}

	@Override
	public final TType[] getSubTypes() {
		return EMPTY_TYPE_ARRAY;
	}

	protected final boolean checkAssignmentBound(TType rhs) {
		if (fBounds.length == 0)
			return true;
		for (int i= 0; i < fBounds.length; i++) {
			if (rhs.canAssignTo(fBounds[i]))
				return true;
		}
		return false;
	}

	protected final boolean canAssignOneBoundTo(TType lhs) {
		if (fBounds.length == 0)
			return lhs.isJavaLangObject();
		for (int i= 0; i < fBounds.length; i++) {
			if (fBounds[i].canAssignTo(lhs))
				return true;
		}
		return false;
	}

}