net.kemitix.dependency.digraph.maven.plugin.DotFileFormatNested Maven / Gradle / Ivy

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Generates a DOT Digraph of dependencies between packages within a project

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package net.kemitix.dependency.digraph.maven.plugin;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

import net.kemitix.dependency.digraph.maven.plugin.digraph.EdgeElement;
import net.kemitix.dependency.digraph.maven.plugin.digraph.Subgraph;
import net.kemitix.node.Node;

/**
 * Generates a dot file dependency report as nested clusters.
 *
 * @author pcampbell
 */
class DotFileFormatNested extends AbstractDotFileFormat {

    DotFileFormatNested(
            final Node base,
            final NodePathGenerator nodePathGenerator) {
        super(base, nodePathGenerator);
    }

    @Override
    String render(final Subgraph subgraph) {
        final String label = quoted(subgraph.getLabel());
        final String id = quoted(subgraph.getId());
        return String.format("subgraph %s{%n" + "label=%s%n"
                        + "%s[label=\"\",style=\"invis\",width=0]%n" + "%s%n}",
                quoted("cluster" + subgraph.getId()), label, id,
                renderElements(subgraph.getElements()));
    }

    @Override
    String render(
            final EdgeElement edgeElement) {
        List attributes = new ArrayList<>();

        final Node tailNode = edgeElement.getTail()
                                                      .getPackageDataNode();
        final Node headNode = edgeElement.getHead()
                                                      .getPackageDataNode();

        // if tail node has children, then add ltail attribute
        if (tailNode.getChildren().size() > 0 && !headNode.isDescendantOf(
                tailNode)) {
            attributes.add(String.format("ltail=\"cluster%s\"",
                    getClusterId(tailNode)));
        }
        // if head node has children, then add lhead attribute
        if (headNode.getChildren().size() > 0 && !tailNode.isDescendantOf(
                headNode)) {
            attributes.add(String.format("lhead=\"cluster%s\"",
                    getClusterId(headNode)));
        }
        String attributeTag = "";
        if (attributes.size() > 0) {
            attributeTag = String.format("[%s]",
                    attributes.stream().collect(Collectors.joining(",")));
        }

        return String.format("%s->%s%s", quoted(getNodeId(tailNode)),
                quoted(getNodeId(headNode)), attributeTag);
    }

}