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Avoid too much nesting

This commit is contained in:
ByteHamster 2019-12-02 10:30:49 +01:00
parent cbcd97f6c9
commit 26e91c0b81
4 changed files with 175 additions and 164 deletions
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9
config/checkstyle/checkstyle-best-practice.xml
View File

@ -244,5 +244,14 @@
<property name="exceptionVariableName" value="expected"/>
</module>
<module name="CommentsIndentation"/>
<module name="NestedIfDepth">
<property name="max" value="4"/>
</module>
<module name="NestedTryDepth">
<property name="max" value="2"/>
</module>
<module name="NestedForDepth">
<property name="max" value="2"/>
</module>
</module>
</module>

9
config/checkstyle/checkstyle.xml
View File

@ -91,5 +91,14 @@
<property name="tokens" value="VARIABLE_DEF"/>
<property name="allowSamelineMultipleAnnotations" value="true"/>
</module>
<module name="NestedIfDepth">
<property name="max" value="4"/>
</module>
<module name="NestedTryDepth">
<property name="max" value="2"/>
</module>
<module name="NestedForDepth">
<property name="max" value="2"/>
</module>
</module>
</module>

14
core/src/main/java/de/danoeh/antennapod/core/syndication/namespace/atom/NSAtom.java
View File

@ -97,11 +97,9 @@ public class NSAtom extends Namespace {
type = SyndTypeUtils.getMimeTypeFromUrl(href);
}
if(SyndTypeUtils.enclosureTypeValid(type)) {
FeedItem currItem = state.getCurrentItem();
if(currItem != null && !currItem.hasMedia()) {
currItem.setMedia(new FeedMedia(currItem, href, size, type));
}
FeedItem currItem = state.getCurrentItem();
if (SyndTypeUtils.enclosureTypeValid(type) && currItem != null && !currItem.hasMedia()) {
currItem.setMedia(new FeedMedia(currItem, href, size, type));
}
} else if (LINK_REL_PAYMENT.equals(rel)) {
state.getCurrentItem().setPaymentLink(href);
@ -111,9 +109,9 @@ public class NSAtom extends Namespace {
String type = attributes.getValue(LINK_TYPE);
/*
* Use as link if a) no type-attribute is given and
* feed-object has no link yet b) type of link is
* LINK_TYPE_HTML or LINK_TYPE_XHTML
*/
* feed-object has no link yet b) type of link is
* LINK_TYPE_HTML or LINK_TYPE_XHTML
*/
if (state.getFeed() != null &&
((type == null && state.getFeed().getLink() == null) ||
(LINK_TYPE_HTML.equals(type) || LINK_TYPE_XHTML.equals(type)))) {

307
core/src/main/java/de/danoeh/antennapod/core/util/id3reader/ID3Reader.java
View File

@ -15,147 +15,142 @@ import de.danoeh.antennapod.core.util.id3reader.model.TagHeader;
* create a subclass of it and overwrite the onStart* - or onEnd* - methods.
*/
public class ID3Reader {
private static final int HEADER_LENGTH = 10;
private static final int ID3_LENGTH = 3;
private static final int FRAME_ID_LENGTH = 4;
private static final int HEADER_LENGTH = 10;
private static final int ID3_LENGTH = 3;
private static final int FRAME_ID_LENGTH = 4;
private static final int ACTION_SKIP = 1;
static final int ACTION_DONT_SKIP = 2;
private static final int ACTION_SKIP = 1;
static final int ACTION_DONT_SKIP = 2;
private int readerPosition;
private int readerPosition;
private static final byte ENCODING_UTF16_WITH_BOM = 1;
private static final byte ENCODING_UTF16_WITH_BOM = 1;
private static final byte ENCODING_UTF16_WITHOUT_BOM = 2;
private static final byte ENCODING_UTF8 = 3;
private TagHeader tagHeader;
ID3Reader() {
}
ID3Reader() {
}
public final void readInputStream(InputStream input) throws IOException,
ID3ReaderException {
int rc;
readerPosition = 0;
char[] tagHeaderSource = readBytes(input, HEADER_LENGTH);
tagHeader = createTagHeader(tagHeaderSource);
if (tagHeader == null) {
onNoTagHeaderFound();
} else {
rc = onStartTagHeader(tagHeader);
if (rc == ACTION_SKIP) {
onEndTag();
} else {
while (readerPosition < tagHeader.getSize()) {
FrameHeader frameHeader = createFrameHeader(readBytes(
input, HEADER_LENGTH));
if (checkForNullString(frameHeader.getId())) {
break;
} else {
rc = onStartFrameHeader(frameHeader, input);
if (rc == ACTION_SKIP) {
public final void readInputStream(InputStream input) throws IOException,
ID3ReaderException {
int rc;
readerPosition = 0;
char[] tagHeaderSource = readBytes(input, HEADER_LENGTH);
tagHeader = createTagHeader(tagHeaderSource);
if (tagHeader == null) {
onNoTagHeaderFound();
} else {
rc = onStartTagHeader(tagHeader);
if (rc == ACTION_SKIP) {
onEndTag();
} else {
while (readerPosition < tagHeader.getSize()) {
FrameHeader frameHeader = createFrameHeader(readBytes(input, HEADER_LENGTH));
if (checkForNullString(frameHeader.getId())) {
break;
}
rc = onStartFrameHeader(frameHeader, input);
if (rc == ACTION_SKIP) {
if (frameHeader.getSize() + readerPosition > tagHeader.getSize()) {
break;
}
skipBytes(input, frameHeader.getSize());
}
}
onEndTag();
}
}
}
if (frameHeader.getSize() + readerPosition > tagHeader
.getSize()) {
break;
} else {
skipBytes(input, frameHeader.getSize());
}
}
}
}
onEndTag();
}
}
}
/** Returns true if string only contains null-bytes. */
private boolean checkForNullString(String s) {
if (!s.isEmpty()) {
int i = 0;
if (s.charAt(i) == 0) {
for (i = 1; i < s.length(); i++) {
if (s.charAt(i) != 0) {
return false;
}
}
return true;
}
return false;
} else {
return true;
}
/** Returns true if string only contains null-bytes. */
private boolean checkForNullString(String s) {
if (!s.isEmpty()) {
int i = 0;
if (s.charAt(i) == 0) {
for (i = 1; i < s.length(); i++) {
if (s.charAt(i) != 0) {
return false;
}
}
return true;
}
return false;
} else {
return true;
}
}
}
/**
* Read a certain number of bytes from the given input stream. This method
* changes the readerPosition-attribute.
*/
/**
* Read a certain number of bytes from the given input stream. This method
* changes the readerPosition-attribute.
*/
char[] readBytes(InputStream input, int number)
throws IOException, ID3ReaderException {
char[] header = new char[number];
for (int i = 0; i < number; i++) {
int b = input.read();
readerPosition++;
if (b != -1) {
header[i] = (char) b;
} else {
throw new ID3ReaderException("Unexpected end of stream");
}
}
return header;
}
throws IOException, ID3ReaderException {
char[] header = new char[number];
for (int i = 0; i < number; i++) {
int b = input.read();
readerPosition++;
if (b != -1) {
header[i] = (char) b;
} else {
throw new ID3ReaderException("Unexpected end of stream");
}
}
return header;
}
/**
* Skip a certain number of bytes on the given input stream. This method
* changes the readerPosition-attribute.
*/
/**
* Skip a certain number of bytes on the given input stream. This method
* changes the readerPosition-attribute.
*/
void skipBytes(InputStream input, int number) throws IOException {
if (number <= 0) {
number = 1;
}
IOUtils.skipFully(input, number);
if (number <= 0) {
number = 1;
}
IOUtils.skipFully(input, number);
readerPosition += number;
}
readerPosition += number;
}
private TagHeader createTagHeader(char[] source) throws ID3ReaderException {
boolean hasTag = (source[0] == 0x49) && (source[1] == 0x44)
&& (source[2] == 0x33);
if (source.length != HEADER_LENGTH) {
throw new ID3ReaderException("Length of header must be "
+ HEADER_LENGTH);
}
if (hasTag) {
String id = new String(source, 0, ID3_LENGTH);
char version = (char) ((source[3] << 8) | source[4]);
byte flags = (byte) source[5];
int size = (source[6] << 24) | (source[7] << 16) | (source[8] << 8)
| source[9];
private TagHeader createTagHeader(char[] source) throws ID3ReaderException {
boolean hasTag = (source[0] == 0x49) && (source[1] == 0x44)
&& (source[2] == 0x33);
if (source.length != HEADER_LENGTH) {
throw new ID3ReaderException("Length of header must be "
+ HEADER_LENGTH);
}
if (hasTag) {
String id = new String(source, 0, ID3_LENGTH);
char version = (char) ((source[3] << 8) | source[4]);
byte flags = (byte) source[5];
int size = (source[6] << 24) | (source[7] << 16) | (source[8] << 8)
| source[9];
size = unsynchsafe(size);
return new TagHeader(id, size, version, flags);
} else {
return null;
}
}
return new TagHeader(id, size, version, flags);
} else {
return null;
}
}
private FrameHeader createFrameHeader(char[] source)
throws ID3ReaderException {
if (source.length != HEADER_LENGTH) {
throw new ID3ReaderException("Length of header must be "
+ HEADER_LENGTH);
}
String id = new String(source, 0, FRAME_ID_LENGTH);
private FrameHeader createFrameHeader(char[] source)
throws ID3ReaderException {
if (source.length != HEADER_LENGTH) {
throw new ID3ReaderException("Length of header must be "
+ HEADER_LENGTH);
}
String id = new String(source, 0, FRAME_ID_LENGTH);
int size = (((int) source[4]) << 24) | (((int) source[5]) << 16)
| (((int) source[6]) << 8) | source[7];
| (((int) source[6]) << 8) | source[7];
if (tagHeader != null && tagHeader.getVersion() >= 0x0400) {
size = unsynchsafe(size);
}
char flags = (char) ((source[8] << 8) | source[9]);
return new FrameHeader(id, size, flags);
}
char flags = (char) ((source[8] << 8) | source[9]);
return new FrameHeader(id, size, flags);
}
private int unsynchsafe(int in) {
int out = 0;
@ -170,42 +165,42 @@ public class ID3Reader {
return out;
}
protected int readString(StringBuilder buffer, InputStream input, int max) throws IOException,
ID3ReaderException {
if (max > 0) {
char[] encoding = readBytes(input, 1);
max--;
if (encoding[0] == ENCODING_UTF16_WITH_BOM || encoding[0] == ENCODING_UTF16_WITHOUT_BOM) {
protected int readString(StringBuilder buffer, InputStream input, int max) throws IOException,
ID3ReaderException {
if (max > 0) {
char[] encoding = readBytes(input, 1);
max--;
if (encoding[0] == ENCODING_UTF16_WITH_BOM || encoding[0] == ENCODING_UTF16_WITHOUT_BOM) {
return readUnicodeString(buffer, input, max, Charset.forName("UTF-16")) + 1; // take encoding byte into account
} else if (encoding[0] == ENCODING_UTF8) {
} else if (encoding[0] == ENCODING_UTF8) {
return readUnicodeString(buffer, input, max, Charset.forName("UTF-8")) + 1; // take encoding byte into account
} else {
return readISOString(buffer, input, max) + 1; // take encoding byte into account
}
} else {
return readISOString(buffer, input, max) + 1; // take encoding byte into account
}
} else {
if (buffer != null) {
buffer.append("");
}
return 0;
}
}
return 0;
}
}
protected int readISOString(StringBuilder buffer, InputStream input, int max)
throws IOException, ID3ReaderException {
int bytesRead = 0;
char c;
while (++bytesRead <= max && (c = (char) input.read()) > 0) {
protected int readISOString(StringBuilder buffer, InputStream input, int max)
throws IOException, ID3ReaderException {
int bytesRead = 0;
char c;
while (++bytesRead <= max && (c = (char) input.read()) > 0) {
if (buffer != null) {
buffer.append(c);
buffer.append(c);
}
}
return bytesRead;
}
}
return bytesRead;
}
private int readUnicodeString(StringBuilder strBuffer, InputStream input, int max, Charset charset)
throws IOException, ID3ReaderException {
byte[] buffer = new byte[max];
private int readUnicodeString(StringBuilder strBuffer, InputStream input, int max, Charset charset)
throws IOException, ID3ReaderException {
byte[] buffer = new byte[max];
int c;
int cZero = -1;
int i = 0;
@ -226,26 +221,26 @@ public class ID3Reader {
}
}
if (strBuffer != null) {
strBuffer.append(charset.newDecoder().decode(ByteBuffer.wrap(buffer)).toString());
strBuffer.append(charset.newDecoder().decode(ByteBuffer.wrap(buffer)).toString());
}
return i;
}
}
int onStartTagHeader(TagHeader header) {
return ACTION_SKIP;
}
int onStartTagHeader(TagHeader header) {
return ACTION_SKIP;
}
int onStartFrameHeader(FrameHeader header, InputStream input)
throws IOException, ID3ReaderException {
return ACTION_SKIP;
}
int onStartFrameHeader(FrameHeader header, InputStream input)
throws IOException, ID3ReaderException {
return ACTION_SKIP;
}
void onEndTag() {
void onEndTag() {
}
}
void onNoTagHeaderFound() {
void onNoTagHeaderFound() {
}
}
}