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/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.modules;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;
import org.jboss.modules.filter.PathFilter;
import org.jboss.modules.filter.PathFilters;
/**
* A dependency tree viewer utility. Prints out the dependency tree for a module.
*/
public final class DependencyTreeViewer {
private static O[] filtered(Class oType, I... inputs) {
final I[] newArray = Arrays.copyOf(inputs, inputs.length);
int o = 0;
for (int i = 0; i < inputs.length; i ++) {
if (oType.getComponentType().isInstance(inputs[i])) {
newArray[o++] = (O) inputs[i];
}
}
return Arrays.copyOf(newArray, o, oType);
}
private static void print(PrintWriter out, String prefix, ModuleSpec spec, FastCopyHashSet visited, File... roots) {
if (spec instanceof AliasModuleSpec) {
final AliasModuleSpec aliasModuleSpec = (AliasModuleSpec) spec;
out.print(" -> ");
final String aliasTarget = aliasModuleSpec.getAliasName();
out.println(aliasTarget);
if (visited.add(aliasTarget)) {
try {
final ModuleSpec moduleSpec = LocalModuleFinder.parseModuleXmlFile(aliasTarget, null, roots);
print(out, prefix, moduleSpec, visited);
} catch (IOException e) {
out.println(e);
} catch (ModuleLoadException e) {
out.println(e);
}
}
} else if (spec instanceof ConcreteModuleSpec) {
out.println();
final ConcreteModuleSpec concreteModuleSpec = (ConcreteModuleSpec) spec;
final DependencySpec[] dependencies = filtered(ModuleDependencySpec[].class, concreteModuleSpec.getDependencies());
for (int i = 0, dependenciesLength = dependencies.length; i < dependenciesLength; i++) {
print(out, prefix, dependencies[i], visited, i == dependenciesLength - 1, roots);
}
} else {
out.println();
}
}
private static void print(PrintWriter out, String prefix, DependencySpec spec, FastCopyHashSet visited, final boolean last, final File... roots) {
if (spec instanceof ModuleDependencySpec) {
final ModuleDependencySpec moduleDependencySpec = (ModuleDependencySpec) spec;
final String name = moduleDependencySpec.getName();
out.print(prefix);
out.print(last ? '└' : '├');
out.print('─');
out.print(' ');
out.print(name);
if (moduleDependencySpec.isOptional()) {
out.print(" (optional)");
}
final PathFilter exportFilter = moduleDependencySpec.getExportFilter();
if (! exportFilter.equals(PathFilters.rejectAll())) {
out.print(" (exported)");
}
if (visited.add(name)) {
print(out, prefix + (last ? " " : "│ "), name, visited, roots);
} else {
out.println();
}
}
}
private static void print(PrintWriter out, String prefix, String name, FastCopyHashSet visited, final File... roots) {
final ModuleSpec moduleSpec;
try {
moduleSpec = LocalModuleFinder.parseModuleXmlFile(name, null, roots);
if (moduleSpec == null) {
out.println(" (not found)");
} else {
print(out, prefix, moduleSpec, visited, roots);
}
} catch (IOException e) {
out.print(" (");
out.print(e);
out.println(")");
} catch (ModuleLoadException e) {
out.print(" (");
out.print(e);
out.println(")");
}
}
/**
* Print the dependency tree for the given module with the given module root list.
*
* @param out the output stream to use
* @param identifier the identifier of the module to examine
* @param roots the module roots to search
* @deprecated Use {@link #print(PrintWriter, String, File...)} instead.
*/
@Deprecated
public static void print(PrintWriter out, ModuleIdentifier identifier, final File... roots) {
print(out, identifier.toString(), roots);
}
/**
* Print the dependency tree for the given module with the given module root list.
*
* @param out the output stream to use
* @param name the name of the module to examine
* @param roots the module roots to search
*/
public static void print(PrintWriter out, String name, final File... roots) {
out.print(name);
print(out, "", name, new FastCopyHashSet(), roots);
out.flush();
}
}
