Copyright (c) 2000, 2015 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, 2015 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.runtime;

import java.util.*;

A concrete multi-status implementation, 
suitable either for instantiating or subclassing.

This class can be used without OSGi running.

/**
 * A concrete multi-status implementation, 
 * suitable either for instantiating or subclassing.
 * <p>
 * This class can be used without OSGi running.
 * </p>
 */
public class MultiStatus extends Status {

	
List of child statuses.
/** List of child statuses.
	 */
	private final List<IStatus> children = new ArrayList<>();

	
Creates and returns a new multi-status object with the given children.
Params:
pluginId – the unique identifier of the relevant plug-in
code – the plug-in-specific status code
newChildren – the list of children status objects
message – a human-readable message, localized to the
   current locale
exception – a low-level exception, or null if not
   applicable/**
	 * Creates and returns a new multi-status object with the given children.
	 *
	 * @param pluginId the unique identifier of the relevant plug-in
	 * @param code the plug-in-specific status code
	 * @param newChildren the list of children status objects
	 * @param message a human-readable message, localized to the
	 *    current locale
	 * @param exception a low-level exception, or <code>null</code> if not
	 *    applicable 
	 */
	public MultiStatus(String pluginId, int code, IStatus[] newChildren, String message, Throwable exception) {
		this(pluginId, code, message, exception);
		Assert.isLegal(newChildren != null);
		addAllInternal(newChildren);
	}

	
Creates and returns a new multi-status object with no children.
Params:
pluginId – the unique identifier of the relevant plug-in
code – the plug-in-specific status code
message – a human-readable message, localized to the
   current locale
exception – a low-level exception, or null if not
   applicable/**
	 * Creates and returns a new multi-status object with no children.
	 *
	 * @param pluginId the unique identifier of the relevant plug-in
	 * @param code the plug-in-specific status code
	 * @param message a human-readable message, localized to the
	 *    current locale
	 * @param exception a low-level exception, or <code>null</code> if not
	 *    applicable 
	 */
	public MultiStatus(String pluginId, int code, String message, Throwable exception) {
		super(OK, pluginId, code, message, exception);
	}

	
Adds the given status to this multi-status.
Params:
status – the new child status/**
	 * Adds the given status to this multi-status.
	 *
	 * @param status the new child status
	 */
	public void add(IStatus status) {
		Assert.isLegal(status != null);
		children.add(status);
		int newSev = status.getSeverity();
		if (newSev > getSeverity()) {
			setSeverity(newSev);
		}
	}

	
Adds all of the children of the given status to this multi-status.
Does nothing if the given status has no children (which includes
the case where it is not a multi-status).
Params:
status – the status whose children are to be added to this one/**
	 * Adds all of the children of the given status to this multi-status.
	 * Does nothing if the given status has no children (which includes
	 * the case where it is not a multi-status).
	 *
	 * @param status the status whose children are to be added to this one
	 */
	public void addAll(IStatus status) {
		Assert.isLegal(status != null);
		addAllInternal(status.getChildren());
	}

	private void addAllInternal(IStatus[] newChildren) {
		int maxSeverity = getSeverity();
		for (IStatus child : newChildren) {
			Assert.isLegal(child != null);
			int severity = child.getSeverity();
			if (severity > maxSeverity)
				maxSeverity = severity;
		}
		this.children.addAll(Arrays.asList(newChildren));
		setSeverity(maxSeverity);
	}

	@Override
	public IStatus[] getChildren() {
		return children.toArray(new IStatus[0]);
	}

	@Override
	public boolean isMultiStatus() {
		return true;
	}

	
Merges the given status into this multi-status.
Equivalent to add(status) if the
given status is not a multi-status. 
Equivalent to addAll(status) if the
given status is a multi-status. 
Params:
status – the status to merge into this one
See Also:
add(IStatus)
addAll(IStatus)/**
	 * Merges the given status into this multi-status.
	 * Equivalent to <code>add(status)</code> if the
	 * given status is not a multi-status. 
	 * Equivalent to <code>addAll(status)</code> if the
	 * given status is a multi-status. 
	 *
	 * @param status the status to merge into this one
	 * @see #add(IStatus)
	 * @see #addAll(IStatus)
	 */
	public void merge(IStatus status) {
		Assert.isLegal(status != null);
		if (!status.isMultiStatus()) {
			add(status);
		} else {
			addAll(status);
		}
	}

	
Returns a string representation of the status, suitable 
for debugging purposes only.
/**
	 * Returns a string representation of the status, suitable 
	 * for debugging purposes only.
	 */
	@Override
	public String toString() {
		StringJoiner joiner = new StringJoiner(" ", super.toString() + " children=[", "]"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
		for (IStatus child : children) {
			joiner.add(child.toString());
		}
		return joiner.toString();
	}
}