org.eclipse.scada.da.client.dataitem.details.part.attrs.AttributesPart.java Source code

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Here is the source code for org.eclipse.scada.da.client.dataitem.details.part.attrs.AttributesPart.java

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/*******************************************************************************
 * Copyright (c) 2012, 2013 TH4 SYSTEMS GmbH 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:
 *     TH4 SYSTEMS GmbH - initial API and implementation
 *     Jens Reimann - additional work
 *******************************************************************************/
package org.eclipse.scada.da.client.dataitem.details.part.attrs;

import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.eclipse.core.databinding.beans.PojoProperties;
import org.eclipse.core.databinding.observable.Diffs;
import org.eclipse.core.databinding.observable.set.SetDiff;
import org.eclipse.core.databinding.observable.set.WritableSet;
import org.eclipse.core.databinding.property.value.IValueProperty;
import org.eclipse.jface.databinding.viewers.ViewerSupport;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.scada.core.Variant;
import org.eclipse.scada.da.client.DataItemValue;
import org.eclipse.scada.da.client.dataitem.details.part.AbstractBaseDetailsPart;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;

public class AttributesPart extends AbstractBaseDetailsPart {

    public static class Entry {
        private final String name;

        private final String type;

        private final String value;

        public Entry(final String name, final String type, final String value) {
            this.name = name;
            this.type = type;
            this.value = value;
        }

        public String getName() {
            return this.name;
        }

        public String getValue() {
            return this.value;
        }

        public String getType() {
            return this.type;
        }

        @Override
        public int hashCode() {
            final int prime = 31;
            int result = 1;
            result = prime * result + (this.name == null ? 0 : this.name.hashCode());
            result = prime * result + (this.type == null ? 0 : this.type.hashCode());
            result = prime * result + (this.value == null ? 0 : this.value.hashCode());
            return result;
        }

        @Override
        public boolean equals(final Object obj) {
            if (this == obj) {
                return true;
            }
            if (obj == null) {
                return false;
            }
            if (getClass() != obj.getClass()) {
                return false;
            }
            final Entry other = (Entry) obj;
            if (this.name == null) {
                if (other.name != null) {
                    return false;
                }
            } else if (!this.name.equals(other.name)) {
                return false;
            }
            if (this.type == null) {
                if (other.type != null) {
                    return false;
                }
            } else if (!this.type.equals(other.type)) {
                return false;
            }
            if (this.value == null) {
                if (other.value != null) {
                    return false;
                }
            } else if (!this.value.equals(other.value)) {
                return false;
            }
            return true;
        }

    }

    private final WritableSet entries = new WritableSet();

    private TableViewer viewer;

    @Override
    public void createPart(final Composite parent) {
        super.createPart(parent);

        this.viewer = new TableViewer(parent, SWT.FULL_SELECTION);

        final TableLayout tableLayout = new TableLayout();

        final TableViewerColumn col1 = new TableViewerColumn(this.viewer, SWT.NONE);
        col1.getColumn().setText(Messages.AttributesPart_NameLabel);
        tableLayout.addColumnData(new ColumnWeightData(50));

        final TableViewerColumn col2 = new TableViewerColumn(this.viewer, SWT.NONE);
        col2.getColumn().setText(Messages.AttributesPart_TypeLabel);
        tableLayout.addColumnData(new ColumnWeightData(20));

        final TableViewerColumn col3 = new TableViewerColumn(this.viewer, SWT.NONE);
        col3.getColumn().setText(Messages.AttributesPart_ValueLabel);
        tableLayout.addColumnData(new ColumnWeightData(50));

        this.viewer.getTable().setHeaderVisible(true);
        this.viewer.getTable().setLayout(tableLayout);

        ViewerSupport.bind(this.viewer, this.entries, new IValueProperty[] { PojoProperties.value("name"), //$NON-NLS-1$
                PojoProperties.value("type"), PojoProperties.value("value") }); //$NON-NLS-1$ //$NON-NLS-2$

        this.viewer.setComparator(new ViewerComparator());
    }

    @Override
    public void dispose() {
        this.entries.dispose();
        super.dispose();
    }

    @Override
    protected void update() {
        final Set<Entry> newAttributes = convert(getValue());
        final SetDiff diff = Diffs.computeSetDiff(this.entries, newAttributes);
        diff.applyTo(this.entries);
    }

    private Set<Entry> convert(final DataItemValue value) {
        if (value == null || value.getAttributes() == null) {
            return Collections.emptySet();
        }

        final Set<Entry> entries = new HashSet<AttributesPart.Entry>(value.getAttributes().size());

        for (final Map.Entry<String, Variant> entry : value.getAttributes().entrySet()) {
            final Variant entryValue = entry.getValue();
            if (entryValue != null) {
                entries.add(new Entry(entry.getKey(), entryValue.getType().toString(), entryValue.toLabel()));
            } else {
                entries.add(new Entry(entry.getKey(), null, null));
            }
        }

        return entries;
    }

}