From: jsimomaa <jani.simomaa@gmail.com>
Date: Tue, 20 Dec 2016 15:25:07 +0000 (+0200)
Subject: Adding basic import utilities - WIP!
X-Git-Tag: v1.31.0~21
X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=commitdiff_plain;h=31bcbe46c93a576cd6ade673a745ea9cb28672da;p=simantics%2Fdistrict.git

Adding basic import utilities - WIP!
---

diff --git a/org.simantics.district.feature/.project b/org.simantics.district.feature/.project
new file mode 100644
index 00000000..61ffe362
--- /dev/null
+++ b/org.simantics.district.feature/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.simantics.district.feature</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.pde.FeatureBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.pde.FeatureNature</nature>
+	</natures>
+</projectDescription>
diff --git a/org.simantics.district.feature/build.properties b/org.simantics.district.feature/build.properties
new file mode 100644
index 00000000..82ab19c6
--- /dev/null
+++ b/org.simantics.district.feature/build.properties
@@ -0,0 +1 @@
+bin.includes = feature.xml
diff --git a/org.simantics.district.feature/feature.xml b/org.simantics.district.feature/feature.xml
new file mode 100644
index 00000000..57e342d4
--- /dev/null
+++ b/org.simantics.district.feature/feature.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<feature
+      id="org.simantics.district.feature"
+      label="Simantics District Feature"
+      version="1.0.0.qualifier">
+
+   <description url="http://www.example.com/description">
+      [Enter Feature Description here.]
+   </description>
+
+   <copyright url="http://www.example.com/copyright">
+      [Enter Copyright Description here.]
+   </copyright>
+
+   <license url="http://www.example.com/license">
+      [Enter License Description here.]
+   </license>
+
+   <plugin
+         id="org.simantics.district.network"
+         download-size="0"
+         install-size="0"
+         version="0.0.0"
+         unpack="false"/>
+
+   <plugin
+         id="org.simantics.district.network.ontology"
+         download-size="0"
+         install-size="0"
+         version="0.0.0"
+         unpack="false"/>
+
+   <plugin
+         id="org.simantics.district.imports"
+         download-size="0"
+         install-size="0"
+         version="0.0.0"
+         unpack="false"/>
+
+</feature>
diff --git a/org.simantics.district.imports.ui/.classpath b/org.simantics.district.imports.ui/.classpath
new file mode 100644
index 00000000..b862a296
--- /dev/null
+++ b/org.simantics.district.imports.ui/.classpath
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/org.simantics.district.imports.ui/.project b/org.simantics.district.imports.ui/.project
new file mode 100644
index 00000000..9c9d811b
--- /dev/null
+++ b/org.simantics.district.imports.ui/.project
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.simantics.district.imports.ui</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/org.simantics.district.imports.ui/META-INF/MANIFEST.MF b/org.simantics.district.imports.ui/META-INF/MANIFEST.MF
new file mode 100644
index 00000000..fb65af54
--- /dev/null
+++ b/org.simantics.district.imports.ui/META-INF/MANIFEST.MF
@@ -0,0 +1,12 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Simantics District Import UI
+Bundle-SymbolicName: org.simantics.district.imports.ui;singleton:=true
+Bundle-Version: 1.0.0.qualifier
+Bundle-RequiredExecutionEnvironment: JavaSE-1.8
+Require-Bundle: org.eclipse.ui.ide,
+ org.eclipse.jface,
+ org.simantics.utils.ui,
+ org.simantics.district.imports;bundle-version="1.0.0",
+ org.simantics.db
+Bundle-ActivationPolicy: lazy
diff --git a/org.simantics.district.imports.ui/build.properties b/org.simantics.district.imports.ui/build.properties
new file mode 100644
index 00000000..6f20375d
--- /dev/null
+++ b/org.simantics.district.imports.ui/build.properties
@@ -0,0 +1,5 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .,\
+               plugin.xml
diff --git a/org.simantics.district.imports.ui/plugin.xml b/org.simantics.district.imports.ui/plugin.xml
new file mode 100644
index 00000000..fe77b996
--- /dev/null
+++ b/org.simantics.district.imports.ui/plugin.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?eclipse version="3.4"?>
+<plugin>
+   <extension
+         point="org.eclipse.ui.importWizards">
+      <wizard
+            class="org.simantics.district.imports.ui.CSVImportWizard"
+            id="org.simantics.district.imports.ui.csvimportwizard"
+            name="Import CSV data to Simantics District">
+         <description>
+            Imports CSV data to Simantics District network
+         </description>
+      </wizard>
+   </extension>
+</plugin>
diff --git a/org.simantics.district.imports.ui/src/org/simantics/district/imports/ui/CSVImportModel.java b/org.simantics.district.imports.ui/src/org/simantics/district/imports/ui/CSVImportModel.java
new file mode 100644
index 00000000..50c427c4
--- /dev/null
+++ b/org.simantics.district.imports.ui/src/org/simantics/district/imports/ui/CSVImportModel.java
@@ -0,0 +1,73 @@
+package org.simantics.district.imports.ui;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import org.simantics.district.imports.DistrictImportUtils;
+import org.simantics.district.imports.DistrictImportUtils.CSVHeader;
+
+public class CSVImportModel {
+
+    private Path source;
+    private char delimiter;
+    private boolean read;
+    private Map<String, Character> delimiters;
+
+    public CSVImportModel() {
+        delimiters = DistrictImportUtils.getSupportedCSVDelimiterFormats();
+    }
+    
+    public void setSource(Path source) {
+        this.source = source;
+    }
+
+    public void setDelimiter(char delimiter) {
+        this.delimiter = delimiter;
+    }
+
+    public void setReadFirstAsHeader(boolean read) {
+        this.read = read;
+    }
+
+    public Path getSource() {
+        return source;
+    }
+
+    public Map<CSVHeader, List<String>> getHeaderAndRows(int amount) throws IOException {
+        if (source != null)
+            return DistrictImportUtils.readCSVHeaderAndRows(source, delimiter, read, amount);
+        else
+            return Collections.emptyMap();
+    }
+    
+    public Map<String, Integer> getHeader() throws IOException {
+        Map<String, Integer> header = null;
+        if (source != null)
+            header = DistrictImportUtils.readCSVHeader(source, delimiter, read);
+        if (header == null)
+            header = Collections.emptyMap();
+        return header;
+    }
+
+    public boolean getReadFirstAsHeader() {
+        return read;
+    }
+
+    public String[] getDelimiterFormats() {
+        return delimiters.keySet().toArray(new String[delimiters.size()]);
+    }
+
+    public void setDelimiterByLabel(String item) {
+        setDelimiter(delimiters.get(item));
+    }
+
+    public List<Map<String, String>> readRows(int amount) throws IOException {
+        if (source != null)
+            return DistrictImportUtils.readRows(source, delimiter, read, amount);
+        else
+            return Collections.emptyList();
+    }
+}
diff --git a/org.simantics.district.imports.ui/src/org/simantics/district/imports/ui/CSVImportWizard.java b/org.simantics.district.imports.ui/src/org/simantics/district/imports/ui/CSVImportWizard.java
new file mode 100644
index 00000000..97fa990a
--- /dev/null
+++ b/org.simantics.district.imports.ui/src/org/simantics/district/imports/ui/CSVImportWizard.java
@@ -0,0 +1,38 @@
+package org.simantics.district.imports.ui;
+
+import java.io.IOException;
+import java.nio.file.Path;
+
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.jface.wizard.Wizard;
+import org.eclipse.ui.IImportWizard;
+import org.eclipse.ui.IWorkbench;
+import org.simantics.district.imports.DistrictImportUtils;
+
+public class CSVImportWizard extends Wizard implements IImportWizard {
+
+    private CSVImportModel model;
+    
+    public CSVImportWizard() {
+        setWindowTitle("Import CSV data");
+    }
+    
+    
+    @Override
+    public void init(IWorkbench workbench, IStructuredSelection selection) {
+        model = new CSVImportModel();
+        addPage(new CSVImportWizardPage(model));
+    }
+    
+    @Override
+    public boolean performFinish() {
+        Path csvFile = model.getSource();
+        try {
+            DistrictImportUtils.importCSVAsLayer(csvFile);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return false;
+    }
+
+}
diff --git a/org.simantics.district.imports.ui/src/org/simantics/district/imports/ui/CSVImportWizardPage.java b/org.simantics.district.imports.ui/src/org/simantics/district/imports/ui/CSVImportWizardPage.java
new file mode 100644
index 00000000..85eeb942
--- /dev/null
+++ b/org.simantics.district.imports.ui/src/org/simantics/district/imports/ui/CSVImportWizardPage.java
@@ -0,0 +1,185 @@
+package org.simantics.district.imports.ui;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import org.eclipse.jface.layout.GridDataFactory;
+import org.eclipse.jface.layout.TableColumnLayout;
+import org.eclipse.jface.layout.TreeColumnLayout;
+import org.eclipse.jface.viewers.ColumnViewerToolTipSupport;
+import org.eclipse.jface.viewers.ColumnWeightData;
+import org.eclipse.jface.viewers.IContentProvider;
+import org.eclipse.jface.viewers.TableViewer;
+import org.eclipse.jface.viewers.TreeViewer;
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.jface.wizard.WizardPage;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.events.SelectionListener;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Combo;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Layout;
+import org.eclipse.swt.widgets.Table;
+import org.eclipse.swt.widgets.TableColumn;
+import org.eclipse.swt.widgets.TableItem;
+import org.simantics.district.imports.DistrictImportUtils.CSVHeader;
+import org.simantics.utils.ui.widgets.FileOrDirectorySelectionWidget;
+import org.simantics.utils.ui.widgets.FileSelectionListener;
+import org.simantics.utils.ui.widgets.FileSelectionWidget;
+
+public class CSVImportWizardPage extends WizardPage implements FileSelectionListener {
+
+    private CSVImportModel model;
+    private FileSelectionWidget csvSelection;
+    private Table headerTable;
+    private Button firstAsHeader;
+    private Combo delimiterCombo;
+    private TableColumnLayout tableColumnLayout;
+    private TableViewer tableViewer;
+
+    protected CSVImportWizardPage(CSVImportModel model) {
+        super("Import CSV Data");
+        this.model = model;
+        setMessage("Select CSV file to import");
+    }
+
+    @Override
+    public void createControl(Composite parent) {
+        Composite composite = new Composite(parent, SWT.NONE);
+        composite.setLayout(new GridLayout(1,false));
+        GridDataFactory.fillDefaults().grab(true, true).align(SWT.FILL, SWT.FILL).applyTo(composite);
+        
+        csvSelection = new FileSelectionWidget(composite, "CSV file", SWT.OPEN);
+        csvSelection.addListener(this);
+        
+        delimiterCombo = new Combo(composite, SWT.DROP_DOWN | SWT.READ_ONLY);
+        delimiterCombo.setItems(model.getDelimiterFormats());
+        delimiterCombo.addSelectionListener(new SelectionListener() {
+            
+            @Override
+            public void widgetSelected(SelectionEvent e) {
+                model.setDelimiterByLabel(delimiterCombo.getItem(delimiterCombo.getSelectionIndex()));
+                updateHeaders();
+            }
+            
+            @Override
+            public void widgetDefaultSelected(SelectionEvent e) {
+                
+            }
+        });
+        
+        firstAsHeader = new Button(composite, SWT.CHECK);
+        firstAsHeader.setText("Read first row as header");
+        firstAsHeader.setSelection(model.getReadFirstAsHeader());
+        firstAsHeader.addSelectionListener(new SelectionListener() {
+            
+            @Override
+            public void widgetSelected(SelectionEvent e) {
+                model.setReadFirstAsHeader(firstAsHeader.getSelection());
+                updateHeaders();
+            }
+            
+            @Override
+            public void widgetDefaultSelected(SelectionEvent e) {
+                
+            }
+        });
+        
+        
+        Composite tableComposite = new Composite(composite, SWT.BORDER);
+        TreeColumnLayout treeColumnLayout = new TreeColumnLayout();
+        tableComposite.setLayout(treeColumnLayout);
+        
+        tableViewer = new TableViewer(tableComposite, SWT.V_SCROLL | SWT.H_SCROLL);
+        ColumnViewerToolTipSupport.enableFor(tableViewer);
+        tableViewer.setContentProvider(new IContentProvider() {
+            
+            @Override
+            public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
+                
+            }
+            
+            @Override
+            public void dispose() {
+                
+            }
+        });
+        
+        Table table = tableViewer.getTable();
+        table.setHeaderVisible(true);
+        table.setLinesVisible(true);
+        
+        headerTable = new Table(tableComposite, SWT.NONE);
+        headerTable.setHeaderVisible(true);
+        headerTable.setLinesVisible(true);
+        GridDataFactory.fillDefaults().grab(true, true).align(SWT.FILL, SWT.FILL).applyTo(tableComposite);
+        
+        setControl(composite);
+        
+        updateHeaders();
+        
+        setPageComplete(false);
+    }
+
+    @Override
+    public void fileSelected(FileOrDirectorySelectionWidget source, String[] filename) {
+        String[] selection = csvSelection.getFilename();
+        if (selection != null && selection.length > 0) {
+            Path csvFile = Paths.get(selection[0]);
+            if (!Files.exists(csvFile)) {
+                setErrorMessage("File " + csvFile.toAbsolutePath() + " does not exist");
+            } else {
+                model.setSource(csvFile);
+                updateHeaders();
+                setPageComplete(true);
+            }
+        } else {
+            setPageComplete(false);
+        }
+    }
+
+    private void updateHeaders() {
+        headerTable.setRedraw(false);
+        for (int i = 0; i < headerTable.getColumns().length; i++) {
+            TableColumn column = headerTable.getColumns()[i];
+            column.dispose();
+        }
+        for (int i = 0; i < headerTable.getItemCount(); i++) {
+            TableItem item = headerTable.getItem(i);
+            item.dispose();
+        }
+        try {
+            Map<CSVHeader, List<String>> headerAndValues = model.getHeaderAndRows(5);
+            
+            int coo = headerTable.getColumns().length;
+            int count = headerTable.getColumnCount();
+            
+            for (Map.Entry<CSVHeader, List<String>> entr : headerAndValues.entrySet()) {
+                CSVHeader he = entr.getKey();
+                int index = he.getIndex();
+                TableColumn headerCol = new TableColumn(headerTable, SWT.NONE);
+                headerCol.setText(he.getHeader());
+                
+                tableColumnLayout.setColumnData(headerCol, new ColumnWeightData(10));
+                headerCol.pack();
+                
+                for (String val : entr.getValue()) {
+                    TableItem item = new TableItem(headerTable, SWT.NONE);
+                    item.setText(val);
+                }
+            }
+        } catch (IOException e) {
+            setErrorMessage(e.getMessage());
+        }
+        headerTable.setRedraw(true);
+    }
+
+}
diff --git a/org.simantics.district.imports/.classpath b/org.simantics.district.imports/.classpath
new file mode 100644
index 00000000..ac0cdbaf
--- /dev/null
+++ b/org.simantics.district.imports/.classpath
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry exported="true" kind="lib" path="lib/commons-csv-1.4.jar" sourcepath="lib/commons-csv-1.4-sources.jar"/>
+	<classpathentry kind="src" path="src/"/>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>
diff --git a/org.simantics.district.imports/.project b/org.simantics.district.imports/.project
new file mode 100644
index 00000000..aebad524
--- /dev/null
+++ b/org.simantics.district.imports/.project
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.simantics.district.imports</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/org.simantics.district.imports/META-INF/MANIFEST.MF b/org.simantics.district.imports/META-INF/MANIFEST.MF
new file mode 100644
index 00000000..50cc5d26
--- /dev/null
+++ b/org.simantics.district.imports/META-INF/MANIFEST.MF
@@ -0,0 +1,10 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Simantics District Imports
+Bundle-SymbolicName: org.simantics.district.imports
+Bundle-Version: 1.0.0.qualifier
+Bundle-RequiredExecutionEnvironment: JavaSE-1.8
+Require-Bundle: org.simantics.db
+Export-Package: org.simantics.district.imports
+Bundle-ClassPath: lib/commons-csv-1.4.jar,
+ .
diff --git a/org.simantics.district.imports/build.properties b/org.simantics.district.imports/build.properties
new file mode 100644
index 00000000..78db4425
--- /dev/null
+++ b/org.simantics.district.imports/build.properties
@@ -0,0 +1,5 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .,\
+               lib/commons-csv-1.4.jar
diff --git a/org.simantics.district.imports/lib/commons-csv-1.4-sources.jar b/org.simantics.district.imports/lib/commons-csv-1.4-sources.jar
new file mode 100644
index 00000000..baf9b88f
Binary files /dev/null and b/org.simantics.district.imports/lib/commons-csv-1.4-sources.jar differ
diff --git a/org.simantics.district.imports/lib/commons-csv-1.4.jar b/org.simantics.district.imports/lib/commons-csv-1.4.jar
new file mode 100644
index 00000000..e9eb0bd3
Binary files /dev/null and b/org.simantics.district.imports/lib/commons-csv-1.4.jar differ
diff --git a/org.simantics.district.imports/pom.xml b/org.simantics.district.imports/pom.xml
new file mode 100644
index 00000000..ed7ddaa2
--- /dev/null
+++ b/org.simantics.district.imports/pom.xml
@@ -0,0 +1,42 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.simantics.district.imports</groupId>
+    <artifactId>org.simantics.district.imports</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>eclipse-plugin</packaging>
+
+    <!-- common settings for all modules -->
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <tycho-version>0.25.0</tycho-version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-csv</artifactId>
+            <version>1.4</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <sourceDirectory>src</sourceDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.eclipse.tycho</groupId>
+                <artifactId>tycho-maven-plugin</artifactId>
+                <version>${tycho-version}</version>
+                <extensions>true</extensions>
+            </plugin>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.5.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>
\ No newline at end of file
diff --git a/org.simantics.district.imports/src/org/simantics/district/imports/DistrictImportUtils.java b/org.simantics.district.imports/src/org/simantics/district/imports/DistrictImportUtils.java
new file mode 100644
index 00000000..7c0d998c
--- /dev/null
+++ b/org.simantics.district.imports/src/org/simantics/district/imports/DistrictImportUtils.java
@@ -0,0 +1,156 @@
+package org.simantics.district.imports;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.commons.csv.CSVFormat;
+import org.apache.commons.csv.CSVParser;
+import org.apache.commons.csv.CSVRecord;
+import org.simantics.db.Resource;
+
+public class DistrictImportUtils {
+
+    private DistrictImportUtils() { }
+    
+    
+    public static Resource importCSVAsLayer(Path csvFile) throws IOException {
+        
+        
+        try (CSVParser parser = CSVFormat.DEFAULT.withFirstRecordAsHeader().parse(Files.newBufferedReader(csvFile))) {
+            Map<String, Integer> header = parser.getHeaderMap();
+            System.out.println(header);
+        }
+        return null;
+    }
+    
+    public static Map<String, Integer> readCSVHeader(Path source, char delimiter, boolean firstAsHeader) throws IOException {
+        return readCSVHeader(source, CSVFormat.newFormat(delimiter), firstAsHeader);
+    }
+    
+    public static Map<String, Integer> readCSVHeader(Path source, CSVFormat format, boolean firstAsHeader) throws IOException {
+        if (firstAsHeader)
+            format = format.withFirstRecordAsHeader();
+        try (CSVParser parser = format.parse(Files.newBufferedReader(source))) {
+            return parser.getHeaderMap();
+        }
+    }
+
+
+    public static Map<String, Character> getSupportedCSVDelimiterFormats() {
+        Map<String, Character> delimiters = new HashMap<>();
+        delimiters.put("COMMA", ',');
+        delimiters.put("SEMICOMMA", ';');
+        return delimiters;
+    }
+
+    public static List<Map<String, String>> readRows(Path source, char delimiter, boolean firstAsHeader, int amount) throws IOException {
+        return readRows(source, CSVFormat.newFormat(delimiter), firstAsHeader, amount);
+    }
+
+    public static List<Map<String, String>> readRows(Path source, CSVFormat format, boolean firstAsHeader, int amount) throws IOException {
+        if (firstAsHeader)
+            format = format.withFirstRecordAsHeader();
+        try (CSVParser parser = format.parse(Files.newBufferedReader(source))) {
+            int start = 0;
+            List<Map<String, String>> results = new ArrayList<>(amount);
+            Iterator<CSVRecord> iter = parser.iterator();
+            while (start < amount && iter.hasNext()) {
+                CSVRecord record = iter.next();
+                results.add(record.toMap());
+                start++;
+            }
+            return results;
+        }
+    }
+
+
+    public static Map<CSVHeader, List<String>> readCSVHeaderAndRows(Path source, char delimiter, boolean firstAsHeader, int amount) throws IOException {
+        Map<CSVHeader, List<String>> results = new HashMap<>();
+        CSVFormat format = CSVFormat.newFormat(delimiter);
+        if (firstAsHeader)
+            format = format.withFirstRecordAsHeader();
+        try (CSVParser parser = format.parse(Files.newBufferedReader(source))) {
+            Map<String, Integer> headers = parser.getHeaderMap();
+            if (headers != null && !headers.isEmpty()) {
+                for (int index = 0; index < headers.size(); index++) {
+                    for (String head : headers.keySet()) {
+                        results.put(new CSVHeader(head, index), new ArrayList<>());
+                    }
+                }
+            }
+            
+            Iterator<CSVRecord> records = parser.iterator();
+            int rows = 0;
+            while (rows < amount && records.hasNext()) {
+                CSVRecord record = records.next();
+                for (int j = 0; j < record.size(); j++) {
+                    String value = record.get(j);
+                    String header = Integer.toString(j);
+                    CSVHeader csvHeader = new CSVHeader(header, j);
+                    List<String> vals = results.get(csvHeader);
+                    if (vals == null) {
+                        vals = new ArrayList<>();
+                        results.put(csvHeader, vals);
+                    }
+                    vals.add(value);
+                }
+                rows++;
+            }
+        }
+        return results;
+    }
+    
+    public static class CSVHeader {
+
+        private final String header;
+        private final int index;
+        
+        public CSVHeader(String header, int index) {
+            this.header = header;
+            this.index = index;
+        }
+
+        public String getHeader() {
+            return header;
+        }
+
+        public int getIndex() {
+            return index;
+        }
+        
+        @Override
+        public int hashCode() {
+            final int prime = 31;
+            int result = 1;
+            result = prime * result + ((header == null) ? 0 : header.hashCode());
+            result = prime * result + index;
+            return result;
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj)
+                return true;
+            if (obj == null)
+                return false;
+            if (getClass() != obj.getClass())
+                return false;
+            CSVHeader other = (CSVHeader) obj;
+            if (header == null) {
+                if (other.header != null)
+                    return false;
+            } else if (!header.equals(other.header))
+                return false;
+            if (index != other.index)
+                return false;
+            return true;
+        }
+    }
+
+}
diff --git a/org.simantics.district.ui.feature/.project b/org.simantics.district.ui.feature/.project
new file mode 100644
index 00000000..e8ca237e
--- /dev/null
+++ b/org.simantics.district.ui.feature/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.simantics.district.ui.feature</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.pde.FeatureBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.pde.FeatureNature</nature>
+	</natures>
+</projectDescription>
diff --git a/org.simantics.district.ui.feature/build.properties b/org.simantics.district.ui.feature/build.properties
new file mode 100644
index 00000000..82ab19c6
--- /dev/null
+++ b/org.simantics.district.ui.feature/build.properties
@@ -0,0 +1 @@
+bin.includes = feature.xml
diff --git a/org.simantics.district.ui.feature/feature.xml b/org.simantics.district.ui.feature/feature.xml
new file mode 100644
index 00000000..e43314c8
--- /dev/null
+++ b/org.simantics.district.ui.feature/feature.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<feature
+      id="org.simantics.district.ui.feature"
+      label="Simantics District UI Feature"
+      version="1.0.0.qualifier">
+
+   <description url="http://www.example.com/description">
+      [Enter Feature Description here.]
+   </description>
+
+   <copyright url="http://www.example.com/copyright">
+      [Enter Copyright Description here.]
+   </copyright>
+
+   <license url="http://www.example.com/license">
+      [Enter License Description here.]
+   </license>
+
+   <includes
+         id="org.simantics.district.feature"
+         version="0.0.0"/>
+
+   <plugin
+         id="org.simantics.district.network.ui"
+         download-size="0"
+         install-size="0"
+         version="0.0.0"
+         unpack="false"/>
+
+   <plugin
+         id="org.simantics.district.imports.ui"
+         download-size="0"
+         install-size="0"
+         version="0.0.0"
+         unpack="false"/>
+
+</feature>