Java tutorial
/** * Copyright (c) 2011 Cloudsmith Inc. and other contributors, as listed below. * 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: * Cloudsmith * */ package org.cloudsmith.geppetto.graph.catalog; import java.io.OutputStream; import java.util.Arrays; import java.util.Comparator; import java.util.List; import java.util.Map; import org.cloudsmith.geppetto.catalog.Catalog; import org.cloudsmith.geppetto.catalog.CatalogEdge; import org.cloudsmith.geppetto.catalog.CatalogResource; import org.cloudsmith.geppetto.catalog.CatalogResourceParameter; import org.cloudsmith.graph.ICancel; import org.cloudsmith.graph.elements.Edge; import org.cloudsmith.graph.elements.RootGraph; import org.cloudsmith.graph.elements.Vertex; import org.cloudsmith.graph.graphcss.GraphCSS; import org.cloudsmith.graph.graphcss.StyleSet; import org.cloudsmith.graph.style.Span; import org.cloudsmith.graph.style.labels.LabelRow; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.Path; import com.google.common.base.Predicates; import com.google.common.collect.Iterables; import com.google.common.collect.Lists; import com.google.common.collect.Maps; /** * Produces a Catalog graph in DOT format. * */ public class CatalogGraphProducer extends AbstractCatalogGraphProducer implements CatalogGraphStyles { private Vertex createVertexFor(CatalogResource resource, IPath root) { Vertex v = new Vertex("", STYLE_Resource); v.setStyles(labelStyleForResource(resource, root)); return v; } private StyleSet labelStyleForResource(CatalogResource r, final IPath root) { // Produce a sorted list of parameters (that skips parameters that are really dependencies) List<LabelRow> labelRows = Lists.newArrayList(); CatalogResourceParameter[] sortedProperties = Iterables.toArray( Iterables.filter(getParameterIterable(r), regularParameterPredicate), CatalogResourceParameter.class); Arrays.sort(sortedProperties, new Comparator<CatalogResourceParameter>() { @Override public int compare(CatalogResourceParameter o1, CatalogResourceParameter o2) { return o1.getName().compareTo(o2.getName()); } }); // Add a labelRow for the type[id] StringBuilder builder = new StringBuilder(); builder.append(r.getType()); builder.append("["); builder.append(r.getTitle()); builder.append("]"); int width = 0; boolean hasParameters = sortedProperties.length > 0; boolean hasFooter = r.getFile() != null; if (hasParameters || hasFooter) labelRows.add(getStyles().labelRow("RowSeparator", getStyles().labelCell("SpacingCell", "", Span.colSpan(3)))); labelRows.add(getStyles().labelRow(STYLE_ResourceTitleRow, // getStyles().labelCell(STYLE_ResourceTitleCell, builder.toString(), Span.colSpan(3)))); width += builder.length(); // Rendering of separator line fails in graphviz 2.28 with an error // labelRows.add(getStyles().rowSeparator()); if (hasParameters || hasFooter) { labelRows.add(getStyles().labelRow("RowSeparator", getStyles().labelCell("SpacingCell", "", Span.colSpan(3)))); labelRows.add( getStyles().labelRow("RowSeparator", getStyles().labelCell("HRCell", "", Span.colSpan(3)))); labelRows.add(getStyles().labelRow("RowSeparator", getStyles().labelCell("SpacingCell", "", Span.colSpan(3)))); } // parameters for (CatalogResourceParameter a : sortedProperties) { final String aName = a.getName(); // output file contents as "DATA" as we can't fit the entire contents into a cell. List<String> values = "content".equals(aName) ? Lists.newArrayList("DATA") : a.getValue(); builder = new StringBuilder(); for (String v : values) { builder.append(v); builder.append(" "); } // remove trailing space builder.deleteCharAt(builder.length() - 1); String value = builder.toString(); labelRows.add(getStyles().labelRow(STYLE_ResourcePropertyRow, // getStyles().labelCell(STYLE_ResourcePropertyName, a.getName()), // getStyles().labelCell(STYLE_ResourcePropertyValue, DOUBLE_RIGHT_ARROW + value, Span.colSpan(2)) // )); int tmpWidth = a.getName().length() + value.length() + 2; if (tmpWidth > width) width = tmpWidth; } // A footer with filename[line] // (is not always present) if (hasFooter) { builder = new StringBuilder(); // shorten the text by making it relative to root if possible if (root != null) builder.append(new Path(r.getFile()).makeRelativeTo(root).toString()); else builder.append(r.getFile()); if (r.getLine() != null) { builder.append("["); builder.append(r.getLine()); builder.append("]"); } String tooltip = builder.toString(); if (builder.length() > width) { builder.delete(0, builder.length() - width); builder.insert(0, "[...]"); } if (hasParameters) labelRows.add(getStyles().labelRow("RowSeparator", getStyles().labelCell("SpacingCell", "", Span.colSpan(3)))); int line = -1; try { line = Integer.valueOf(r.getLine()); } catch (NumberFormatException e) { line = -1; } labelRows.add(getStyles().labelRow(STYLE_ResourceFileInfoRow, // getStyles().labelCell(STYLE_ResourceFileInfoCell, builder.toString(), Span.colSpan(3)) .withStyles(// getStyles().tooltip(tooltip), // getStyles().href( getHrefProducer().hrefToManifest(new Path(r.getFile()), root, line)) // )) // ); } else if (hasParameters) { // add a bit of padding at the bottom if there is no footer labelRows.add(getStyles().labelRow("RowSeparator", getStyles().labelCell("SpacingCell", "", Span.colSpan(3)))); } return StyleSet.withStyle(// getStyles().labelFormat(// getStyles().labelTable(STYLE_ResourceTable, // labelRows.toArray(new LabelRow[labelRows.size()])))); } /** * Produces a graph in DOT format for the given catalog on the given output stream. * * @param cancel * enables cancellation of long running job * @param catalog * the catalog for which a graph is produced * @param out * where output in DOT format should be written * @param root * the path to the root of file references in catalogs * @param moduleData * Name -> 0* MetadataInfo representing one version of a module with given name */ public void produceGraph(ICancel cancel, Catalog catalog, String catalogName, OutputStream out, IPath root) { if (cancel == null || catalog == null || out == null) throw new IllegalArgumentException("one or more parameters are null"); RootGraph g = produceRootGraph(cancel, catalog, catalogName, root); GraphCSS instanceRules = getInstanceRules(); instanceRules.addAll(getTheme().getInstanceRules()); getDotRenderer().write(cancel, out, g, getTheme().getDefaultRules(), instanceRules); } /** * Produces the graph data structure (RootGraph, Vertexes, Edges). * */ private RootGraph produceRootGraph(ICancel cancel, Catalog catalog, String catalogName, final IPath root) { RootGraph g = new RootGraph(catalogName, "RootGraph", "root"); // Iterate the catalog // What to do with these? Are they of any value? // catalog.getClasses(); // list of classnames // catalog.getTags(); // don't know if these have any value... Map<String, Vertex> vertexMap = Maps.newHashMap(); Map<CatalogResource, Vertex> resourceVertexMap = Maps.newHashMap(); for (CatalogResource r : catalog.getResources()) { StringBuilder builder = new StringBuilder(); builder.append(r.getType().toLowerCase()); builder.append("["); builder.append(r.getTitle().toLowerCase()); builder.append("]"); Vertex v = createVertexFor(r, root); g.addVertex(v); vertexMap.put(builder.toString(), v); resourceVertexMap.put(r, v); } for (CatalogResource r : catalog.getResources()) { final Vertex source = resourceVertexMap.get(r); for (CatalogResourceParameter p : Iterables.filter(getParameterIterable(r), Predicates.not(regularParameterPredicate))) { String aName = p.getName(); String style = null; if ("subscribe".equals(aName)) style = CatalogGraphStyles.STYLE_SubscribeEdge; else if ("before".equals(aName)) style = CatalogGraphStyles.STYLE_BeforeEdge; else if ("notify".equals(aName)) style = CatalogGraphStyles.STYLE_NotifyEdge; else style = CatalogGraphStyles.STYLE_RequireEdge; for (String ref : p.getValue()) { Vertex target = vertexMap.get(ref.toLowerCase()); if (target == null) { target = createVertexForMissingResource(ref); vertexMap.put(ref.toLowerCase(), target); // keep it if there are more references g.addVertex(target); } Edge edge = new Edge(aName, style, source, target); g.addEdge(edge); } } } for (CatalogEdge e : catalog.getEdges()) { Vertex source = vertexMap.get(e.getSource().toLowerCase()); Vertex target = vertexMap.get(e.getTarget().toLowerCase()); Edge edge = new Edge("", STYLE_ResourceEdge, source, target); g.addEdge(edge); } return g; } }