org.eclipse.emf.mapping.presentation.ComposedSelection.java Source code

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Here is the source code for org.eclipse.emf.mapping.presentation.ComposedSelection.java

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/**
 * Copyright (c) 2002-2006 IBM Corporation and others.
 * All rights reserved.   This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   IBM - Initial API and implementation
 */
package org.eclipse.emf.mapping.presentation;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;

public class ComposedSelection implements IStructuredSelection, IComposedSelection {
    protected ISelection[] selections;
    protected ISelection primarySelection;

    public ComposedSelection(ISelection primarySelection, ISelection[] selections) {
        this.primarySelection = primarySelection;
        this.selections = selections;
    }

    public boolean isEmpty() {
        return primarySelection == null || primarySelection.isEmpty();
    }

    /**
     * @deprecated
     */
    @Deprecated
    public Iterator<?> getElements() {
        return primarySelection instanceof IStructuredSelection
                ? ((IStructuredSelection) primarySelection).iterator()
                : null;
    }

    public Iterator<?> iterator() {
        return primarySelection instanceof IStructuredSelection
                ? ((IStructuredSelection) primarySelection).iterator()
                : null;
    }

    public Object[] toArray() {
        return primarySelection instanceof IStructuredSelection
                ? ((IStructuredSelection) primarySelection).toArray()
                : null;
    }

    public List<?> toList() {
        return primarySelection instanceof IStructuredSelection ? ((IStructuredSelection) primarySelection).toList()
                : null;
    }

    public Object getFirstElement() {
        return primarySelection instanceof IStructuredSelection
                ? ((IStructuredSelection) primarySelection).getFirstElement()
                : null;
    }

    public Object getPrimaryItem() {
        return primarySelection instanceof IStructuredSelection
                ? ((IStructuredSelection) primarySelection).getFirstElement()
                : null;
    }

    public int size() {
        return primarySelection instanceof IStructuredSelection ? ((IStructuredSelection) primarySelection).size()
                : 0;
    }

    public ISelection getSelection() {
        return primarySelection;
    }

    public ISelection[] getSelections() {
        return selections;
    }

    public IStructuredSelection getCombinedSelection() {
        List<Object> result = new ArrayList<Object>();
        for (int i = 0; i < selections.length; ++i) {
            ISelection selection = selections[i];
            if (selection instanceof IStructuredSelection) {
                List<?> list = ((IStructuredSelection) selection).toList();
                result.addAll(list);
            }
        }

        return new StructuredSelection(result);
    }

    @Override
    public boolean equals(Object that) {
        if (this == that) {
            return true;
        } else if (!(that instanceof IComposedSelection)) {
            return false;
        } else {
            IComposedSelection thatComposedSelection = (IComposedSelection) that;
            ISelection thatPrimarySelection = thatComposedSelection.getSelection();
            ISelection[] thatSelections = thatComposedSelection.getSelections();

            if (selections.length == thatSelections.length) {
                for (int i = 0; i < selections.length; ++i) {
                    if (selections[i] == primarySelection) {
                        if (thatSelections[i] != thatPrimarySelection) {
                            return false;
                        }
                    }

                    if (!selections[i].equals(thatSelections[i])) {
                        return false;
                    }
                }

                return true;
            } else {
                return false;
            }
        }
    }

    @Override
    public String toString() {
        StringBuffer result = new StringBuffer();
        result.append("ComposedSection(");
        if (selections != null) {
            for (int i = 0; i < selections.length; ++i) {
                if (selections[i] == primarySelection) {
                    result.append('(');
                    result.append(selections[i]);
                    result.append(')');
                } else {
                    result.append(selections[i]);
                }
            }
        }
        result.append(')');
        return result.toString();
    }
}