144 lines
4.9 KiB
Java
144 lines
4.9 KiB
Java
/* ClassFileIterator.java
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*
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* Created: 2011-10-10 (Year-Month-Day)
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* Character encoding: UTF-8
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*
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****************************************** LICENSE *******************************************
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*
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* Copyright (c) 2011 - 2013 XIAM Solutions B.V. (http://www.xiam.nl)
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* Copyright 2014 dorkbox, llc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dorkbox.annotation;
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import java.io.*;
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/**
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* {@code ClassFileIterator} is used to iterate over all Java ClassFile files available within
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* a specific context.
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* <p/>
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* For every Java ClassFile ({@code .class}) an {@link InputStream} is returned.
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*
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* @author <a href="mailto:rmuller@xiam.nl">Ronald K. Muller</a>
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* @since annotation-detector 3.0.0
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*
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* @author dorkbox, llc
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*/
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public
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class ClassFileIterator implements ClassIterator {
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private FileIterator fileIter;
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protected final String[] pkgNameFilter;
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private ZipFileIterator zipIter;
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private boolean isFile;
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/**
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* Create a new {@code ClassFileIterator} returning all Java ClassFile files available
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* from the specified files and/or directories, including sub directories.
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* <p/>
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* If the (optional) package filter is defined, only class files staring with one of the
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* defined package names are returned.
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* NOTE: package names must be defined in the native format (using '/' instead of '.').
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*/
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protected
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ClassFileIterator(final String[] pkgNameFilter) {
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this.pkgNameFilter = pkgNameFilter;
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}
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/**
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* Create a new {@code ClassFileIterator} returning all Java ClassFile files available
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* from the specified files and/or directories, including sub directories.
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* <p/>
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* If the (optional) package filter is defined, only class files staring with one of the
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* defined package names are returned.
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* NOTE: package names must be defined in the native format (using '/' instead of '.').
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*/
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protected
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ClassFileIterator(final File[] filesOrDirectories, final String[] pkgNameFilter) {
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this.fileIter = new FileIterator(filesOrDirectories);
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this.pkgNameFilter = pkgNameFilter;
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}
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/**
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* Return the name of the Java ClassFile returned from the last call to {@link #next()}.
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* The name is either the path name of a file or the name of an ZIP/JAR file entry.
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*/
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@Override
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public
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String getName() {
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// Both getPath() and getName() are very light weight method calls
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return this.zipIter == null ? this.fileIter.getFile().getPath() : this.zipIter.getEntry().getName();
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}
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/**
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* Return {@code true} if the current {@link InputStream} is reading from a plain
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* {@link File}.
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* Return {@code false} if the current {@link InputStream} is reading from a
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* ZIP File Entry.
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*/
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@Override
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public
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boolean isFile() {
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return this.isFile;
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}
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/**
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* Return the next Java ClassFile as an {@code InputStream}.
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* <p/>
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* NOTICE: Client code MUST close the returned {@code InputStream}!
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*/
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@Override
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public
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InputStream next(final FilenameFilter filter) throws IOException {
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while (true) {
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if (this.zipIter == null) {
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final File file = this.fileIter.next();
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if (file == null) {
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return null;
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}
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else {
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final String path = file.getPath();
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if (path.endsWith(".class") && (filter == null || filter.accept(this.fileIter.getRootFile(), this.fileIter.relativize(
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path)))) {
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this.isFile = true;
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return new FileInputStream(file);
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}
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else if (this.fileIter.isRootFile() && endsWithIgnoreCase(path, ".jar")) {
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this.zipIter = new ZipFileIterator(file, this.pkgNameFilter);
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} // else just ignore
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}
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}
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else {
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final InputStream is = this.zipIter.next(filter);
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if (is == null) {
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this.zipIter = null;
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}
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else {
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this.isFile = false;
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return is;
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}
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}
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}
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}
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// private
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private static
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boolean endsWithIgnoreCase(final String value, final String suffix) {
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final int n = suffix.length();
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return value.regionMatches(true, value.length() - n, suffix, 0, n);
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}
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}
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