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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.tools.ant.taskdefs.optional.extension;
import java.io.File;
import java.text.ParseException;
import java.util.jar.Manifest;
import org.apache.tools.ant.BuildException;
/**
* Utility class to output the information in a jar relating
* to "Optional Packages" (formely known as "Extensions")
* and Package Specifications.
*
*/
class LibraryDisplayer {
/**
* Display the extensions and specifications contained
* within specified file.
*
* @param file the file
* @throws BuildException if fail to read file
*/
void displayLibrary(final File file)
throws BuildException {
final Manifest manifest = ExtensionUtil.getManifest(file);
displayLibrary(file, manifest);
}
/**
* Display the extensions and specifications contained
* within specified file.
*
* @param file the file to use while reporting
* @param manifest the manifest of file
* @throws BuildException if fail to read file
*/
void displayLibrary(final File file,
final Manifest manifest)
throws BuildException {
final Extension[] available = Extension.getAvailable(manifest);
final Extension[] required = Extension.getRequired(manifest);
final Extension[] options = Extension.getOptions(manifest);
final Specification[] specifications = getSpecifications(manifest);
if (0 == available.length && 0 == required.length && 0 == options.length
&& 0 == specifications.length) {
return;
}
final String message = "File: " + file;
final int size = message.length();
printLine(size);
System.out.println(message);
printLine(size);
if (0 != available.length) {
System.out.println("Extensions Supported By Library:");
for (int i = 0; i < available.length; i++) {
final Extension extension = available[ i ];
System.out.println(extension.toString());
}
}
if (0 != required.length) {
System.out.println("Extensions Required By Library:");
for (int i = 0; i < required.length; i++) {
final Extension extension = required[ i ];
System.out.println(extension.toString());
}
}
if (0 != options.length) {
System.out.println("Extensions that will be used by Library if present:");
for (int i = 0; i < options.length; i++) {
final Extension extension = options[ i ];
System.out.println(extension.toString());
}
}
if (0 != specifications.length) {
System.out.println("Specifications Supported By Library:");
for (int i = 0; i < specifications.length; i++) {
final Specification specification = specifications[ i ];
displaySpecification(specification);
}
}
}
/**
* Print out a line of '-'s equal to specified size.
*
* @param size the number of dashes to printout
*/
private void printLine(final int size) {
for (int i = 0; i < size; i++) {
System.out.print("-");
}
System.out.println();
}
/**
* Get specifications from manifest.
*
* @param manifest the manifest
* @return the specifications or null if none
* @throws BuildException if malformed specification sections
*/
private Specification[] getSpecifications(final Manifest manifest)
throws BuildException {
try {
return Specification.getSpecifications(manifest);
} catch (final ParseException pe) {
throw new BuildException(pe.getMessage(), pe);
}
}
/**
* Print out specification details.
*
* @param specification the specification
*/
private void displaySpecification(final Specification specification) {
final String[] sections = specification.getSections();
if (null != sections) {
final StringBuffer sb = new StringBuffer("Sections: ");
for (int i = 0; i < sections.length; i++) {
sb.append(" ");
sb.append(sections[ i ]);
}
System.out.println(sb);
}
System.out.println(specification.toString());
}
}
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