Java tutorial
/* (c) 2014 Open Source Geospatial Foundation - all rights reserved * (c) 2001 - 2013 OpenPlans * This code is licensed under the GPL 2.0 license, available at the root * application directory. */ package org.geoserver.wps.web; import java.io.ByteArrayOutputStream; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; import javax.xml.transform.TransformerException; import org.apache.wicket.Page; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior; import org.apache.wicket.ajax.markup.html.AjaxLink; import org.apache.wicket.extensions.ajax.markup.html.modal.ModalWindow; import org.apache.wicket.markup.html.WebMarkupContainer; import org.apache.wicket.markup.html.form.DropDownChoice; import org.apache.wicket.markup.html.form.TextArea; import org.apache.wicket.markup.html.form.TextField; import org.apache.wicket.markup.html.panel.Fragment; import org.apache.wicket.markup.html.panel.Panel; import org.apache.wicket.model.Model; import org.apache.wicket.model.PropertyModel; import org.geoserver.catalog.Catalog; import org.geoserver.catalog.CoverageInfo; import org.geoserver.catalog.FeatureTypeInfo; import org.geoserver.catalog.LayerInfo; import org.geoserver.web.GeoServerApplication; import org.geoserver.wps.web.InputParameterValues.ParameterType; import org.geotools.geometry.jts.ReferencedEnvelope; import org.geotools.util.logging.Logging; /** * Allows the user to edit a complex input parameter providing a variety of different editors * depending on the parameter type * * @author Andrea Aime - OpenGeo */ @SuppressWarnings("serial") public class ComplexInputPanel extends Panel { static final Logger LOGGER = Logging.getLogger(WPSRequestBuilderPanel.class); private DropDownChoice typeChoice; PropertyModel valueModel; List<String> mimeTypes; ModalWindow subprocesswindow; public ComplexInputPanel(String id, InputParameterValues pv, int valueIndex) { super(id); setOutputMarkupId(true); setDefaultModel(new PropertyModel(pv, "values[" + valueIndex + "]")); valueModel = new PropertyModel(getDefaultModel(), "value"); mimeTypes = pv.getSupportedMime(); List<ParameterType> ptypes = pv.getSupportedTypes(); ptypes.remove(ParameterType.LITERAL); typeChoice = new DropDownChoice("type", new PropertyModel(getDefaultModelObject(), "type"), ptypes); add(typeChoice); subprocesswindow = new ModalWindow("subprocessPopupWindow"); subprocesswindow.setInitialWidth(700); subprocesswindow.setInitialHeight(500); add(subprocesswindow); subprocesswindow.setPageCreator(new ModalWindow.PageCreator() { public Page createPage() { return new SubProcessBuilder((ExecuteRequest) subprocesswindow.getDefaultModelObject(), subprocesswindow); } }); updateEditor(); typeChoice.add(new AjaxFormComponentUpdatingBehavior("onchange") { @Override protected void onUpdate(AjaxRequestTarget target) { updateEditor(); target.addComponent(ComplexInputPanel.this); } }); } void updateEditor() { // remove the old editor if (get("editor") != null) { remove("editor"); } ParameterType pt = (ParameterType) typeChoice.getModelObject(); if (pt == ParameterType.TEXT) { // an internal vector layer if (!(valueModel.getObject() instanceof String)) { valueModel.setObject(""); } // data as plain text Fragment f = new Fragment("editor", "text", this); DropDownChoice mimeChoice = new DropDownChoice("mime", new PropertyModel(getDefaultModel(), "mime"), mimeTypes); f.add(mimeChoice); f.add(new TextArea("textarea", valueModel)); add(f); } else if (pt == ParameterType.VECTOR_LAYER) { // an internal vector layer if (!(valueModel.getObject() instanceof VectorLayerConfiguration)) { valueModel.setObject(new VectorLayerConfiguration()); } new PropertyModel(getDefaultModel(), "mime").setObject("text/xml"); Fragment f = new Fragment("editor", "vectorLayer", this); DropDownChoice layer = new DropDownChoice("layer", new PropertyModel(valueModel, "layerName"), getVectorLayerNames()); f.add(layer); add(f); } else if (pt == ParameterType.RASTER_LAYER) { // an internal raster layer if (!(valueModel.getObject() instanceof RasterLayerConfiguration)) { valueModel.setObject(new RasterLayerConfiguration()); } Fragment f = new Fragment("editor", "rasterLayer", this); final DropDownChoice layer = new DropDownChoice("layer", new PropertyModel(valueModel, "layerName"), getRasterLayerNames()); f.add(layer); add(f); // we need to update the raster own bounding box as wcs requests // mandate a spatial extent (why oh why???) layer.add(new AjaxFormComponentUpdatingBehavior("onchange") { @Override protected void onUpdate(AjaxRequestTarget target) { String name = layer.getDefaultModelObjectAsString(); LayerInfo li = GeoServerApplication.get().getCatalog().getLayerByName(name); ReferencedEnvelope spatialDomain = li.getResource().getNativeBoundingBox(); ((RasterLayerConfiguration) valueModel.getObject()).setSpatialDomain(spatialDomain); } }); } else if (pt == ParameterType.REFERENCE) { // an external reference if (!(valueModel.getObject() instanceof ReferenceConfiguration)) { valueModel.setObject(new ReferenceConfiguration()); } Fragment f = new Fragment("editor", "reference", this); final DropDownChoice method = new DropDownChoice("method", new PropertyModel(valueModel, "method"), Arrays.asList(ReferenceConfiguration.Method.GET, ReferenceConfiguration.Method.POST)); f.add(method); DropDownChoice mimeChoice = new DropDownChoice("mime", new PropertyModel(valueModel, "mime"), mimeTypes); f.add(mimeChoice); f.add(new TextField("url", new PropertyModel(valueModel, "url")).setRequired(true)); final TextArea body = new TextArea("body", new PropertyModel(valueModel, "body")); add(body); final WebMarkupContainer bodyContainer = new WebMarkupContainer("bodyContainer"); f.add(bodyContainer); bodyContainer.setOutputMarkupId(true); bodyContainer.add(body); bodyContainer.setVisible(false); method.add(new AjaxFormComponentUpdatingBehavior("onchange") { @Override protected void onUpdate(AjaxRequestTarget target) { boolean post = method.getModelObject() == ReferenceConfiguration.Method.POST; bodyContainer.setVisible(post); body.setRequired(post); target.addComponent(ComplexInputPanel.this); } }); add(f); } else if (pt == ParameterType.SUBPROCESS) { if (!(valueModel.getObject() instanceof ExecuteRequest)) { valueModel.setObject(new ExecuteRequest()); } Fragment f = new Fragment("editor", "subprocess", this); f.add(new AjaxLink("edit") { @Override public void onClick(AjaxRequestTarget target) { subprocesswindow.setDefaultModel(valueModel); subprocesswindow.show(target); } }); final TextArea xml = new TextArea("xml"); if (((ExecuteRequest) valueModel.getObject()).processName != null) { try { xml.setModelObject(getExecuteXML()); } catch (Throwable t) { xml.setModel(new Model("")); } } else { xml.setModel(new Model("")); } xml.setOutputMarkupId(true); f.add(xml); subprocesswindow.setWindowClosedCallback(new ModalWindow.WindowClosedCallback() { public void onClose(AjaxRequestTarget target) { // turn the GUI request into an actual WPS request xml.setModelObject(getExecuteXML()); target.addComponent(xml); } }); add(f); } else { error("Unsupported parameter type"); } } String getExecuteXML() { WPSExecuteTransformer tx = new WPSExecuteTransformer(); tx.setIndentation(2); ByteArrayOutputStream out = new ByteArrayOutputStream(); try { tx.transform(valueModel.getObject(), out); } catch (TransformerException e) { LOGGER.log(Level.SEVERE, "Error generating xml request", e); error(e); } String executeXml = out.toString(); return executeXml; } List<String> getVectorLayerNames() { Catalog catalog = GeoServerApplication.get().getCatalog(); List<String> result = new ArrayList<String>(); for (LayerInfo li : catalog.getLayers()) { if (li.getResource() instanceof FeatureTypeInfo) { result.add(li.getResource().getPrefixedName()); } } return result; } List<String> getRasterLayerNames() { Catalog catalog = GeoServerApplication.get().getCatalog(); List<String> result = new ArrayList<String>(); for (LayerInfo li : catalog.getLayers()) { if (li.getResource() instanceof CoverageInfo) { result.add(li.getResource().getPrefixedName()); } } return result; } }