Copyright (c) 2004, 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
/*******************************************************************************
 * Copyright (c) 2004, 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.eclipse.core.internal.content;

import java.io.*;
import org.eclipse.core.runtime.QualifiedName;
import org.eclipse.core.runtime.content.IContentDescription;
import org.eclipse.core.runtime.content.ITextContentDescriber;

This class provides internal basis for text-based content describers.

Note: do not add protected/public members to this class if you don't intend to
make them public API.

See Also:
XMLRootElementContentDescriber2
Since:
3.0/**
 * This class provides internal basis for text-based content describers.
 *
 * <p>
 * Note: do not add protected/public members to this class if you don't intend to
 * make them public API.
 * </p>
 *
 * @see org.eclipse.core.runtime.content.XMLRootElementContentDescriber2
 * @since 3.0
 */
public class TextContentDescriber implements ITextContentDescriber {

	private final static QualifiedName[] SUPPORTED_OPTIONS = {IContentDescription.BYTE_ORDER_MARK};

	@Override
	public int describe(Reader contents, IContentDescription description) throws IOException {
		// we want to be pretty loose on detecting the text content type
		return INDETERMINATE;
	}

	@Override
	public int describe(InputStream contents, IContentDescription description) throws IOException {
		if (description == null || !description.isRequested(IContentDescription.BYTE_ORDER_MARK))
			return INDETERMINATE;
		byte[] bom = Util.getByteOrderMark(contents);
		if (bom != null)
			description.setProperty(IContentDescription.BYTE_ORDER_MARK, bom);
		// we want to be pretty loose on detecting the text content type
		return INDETERMINATE;
	}

	@Override
	public QualifiedName[] getSupportedOptions() {
		return SUPPORTED_OPTIONS;
	}
}