Copyright (c) 2010, 2015 Broadcom 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:
Broadcom Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2010, 2015 Broadcom 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:
 * Broadcom Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.internal.events;

import java.util.Arrays;
import org.eclipse.core.resources.IBuildConfiguration;
import org.eclipse.core.resources.IBuildContext;
import org.eclipse.core.runtime.Assert;

Concrete implementation of a build context
/**
 * Concrete implementation of a build context
 */
public class BuildContext implements IBuildContext {

	
The Build Configuration currently being built /** The Build Configuration currently being built */
	private final IBuildConfiguration buildConfiguration;
	
Configurations user requested to be built /** Configurations user requested to be built */
	private final IBuildConfiguration[] requestedBuilt;
	
The configurations built as part of this build invocations/** The configurations built as part of this build invocations*/
	private final IBuildConfiguration[] buildOrder;

	
Create an empty build context for the given project configuration.
Params:
buildConfiguration – the project configuration being built, that we need the context for/**
	 * Create an empty build context for the given project configuration.
	 * @param buildConfiguration the project configuration being built, that we need the context for
	 */
	public BuildContext(IBuildConfiguration buildConfiguration) {
		this.buildConfiguration = buildConfiguration;
		requestedBuilt = buildOrder = new IBuildConfiguration[] {buildConfiguration};
	}

	
Create a build context for the given project configuration.
Params:
buildConfiguration – the project configuration being built, that we need the context for
requestedBuilt – an array of configurations the user actually requested to be built
buildOrder – the build order for the entire build, indicating how cycles etc. have been resolved/**
	 * Create a build context for the given project configuration.
	 * @param buildConfiguration the project configuration being built, that we need the context for
	 * @param requestedBuilt an array of configurations the user actually requested to be built
	 * @param buildOrder the build order for the entire build, indicating how cycles etc. have been resolved
	 */
	public BuildContext(IBuildConfiguration buildConfiguration, IBuildConfiguration[] requestedBuilt, IBuildConfiguration[] buildOrder) {
		this.buildConfiguration = buildConfiguration;
		this.requestedBuilt = requestedBuilt;
		this.buildOrder = buildOrder;
	}

	private int findBuildConfigurationIndex() {
		int position = -1;
		for (int i = 0; i < buildOrder.length; i++) {
			if (buildOrder[i].equals(buildConfiguration)) {
				position = i;
				break;
			}
		}
		Assert.isTrue(0 <= position && position < buildOrder.length);
		return position;
	}

	@Override
	public IBuildConfiguration[] getRequestedConfigs() {
		return requestedBuilt.clone();
	}

	@Override
	public IBuildConfiguration[] getAllReferencedBuildConfigs() {
		int position = findBuildConfigurationIndex();
		IBuildConfiguration[] builtBefore = new IBuildConfiguration[position];
		System.arraycopy(buildOrder, 0, builtBefore, 0, builtBefore.length);
		return builtBefore;
	}

	@Override
	public IBuildConfiguration[] getAllReferencingBuildConfigs() {
		int position = findBuildConfigurationIndex();
		IBuildConfiguration[] builtAfter = new IBuildConfiguration[buildOrder.length - position - 1];
		System.arraycopy(buildOrder, position + 1, builtAfter, 0, builtAfter.length);
		return builtAfter;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + buildConfiguration.hashCode();
		result = prime * result + Arrays.hashCode(requestedBuilt);
		result = prime * result + Arrays.hashCode(buildOrder);
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		BuildContext other = (BuildContext) obj;
		return buildConfiguration.equals(other.buildConfiguration) && Arrays.equals(requestedBuilt, other.requestedBuilt) && Arrays.equals(buildOrder, other.buildOrder);
	}

}