Package org.apache.tomcat.util.buf
Class CharChunk
- java.lang.Object
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- org.apache.tomcat.util.buf.AbstractChunk
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- org.apache.tomcat.util.buf.CharChunk
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- All Implemented Interfaces:
Serializable,CharSequence,Cloneable
public final class CharChunk extends AbstractChunk implements CharSequence
Utilities to manipulate char chunks. While String is the easiest way to manipulate chars ( search, substrings, etc), it is known to not be the most efficient solution - Strings are designed as immutable and secure objects.- Author:
- dac@sun.com, James Todd [gonzo@sun.com], Costin Manolache, Remy Maucherat
- See Also:
- Serialized Form
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Nested Class Summary
Nested Classes Modifier and Type Class Description static interfaceCharChunk.CharInputChannelInput interface, used when the buffer is empty.static interfaceCharChunk.CharOutputChannelWhen we need more space we'll either grow the buffer ( up to the limit ) or send it to a channel.
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Field Summary
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Fields inherited from class org.apache.tomcat.util.buf.AbstractChunk
ARRAY_MAX_SIZE, end, hasHashCode, isSet, sm, start
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description voidallocate(int initial, int limit)voidappend(char c)voidappend(char[] src, int off, int len)Add data to the buffer.voidappend(String s)Append a string to the buffer.voidappend(String s, int off, int len)Append a string to the buffer.voidappend(CharChunk src)charcharAt(int index)Objectclone()booleanendsWith(String s)booleanequals(char[] b2, int off2, int len2)booleanequals(Object obj)booleanequals(String s)Compares the message bytes to the specified String object.booleanequals(CharChunk cc)booleanequalsIgnoreCase(String s)Compares the message bytes to the specified String object.voidflushBuffer()Send the buffer to the sink.char[]getBuffer()protected intgetBufferElement(int index)char[]getChars()intindexOf(char c)static intindexOf(char[] chars, int start, int end, char s)Returns the first instance of the given character in the given char array between the specified start and end.intindexOf(char c, int starting)Returns the first instance of the given character in this CharChunk starting at the specified char.intlength()voidmakeSpace(int count)Make space for len chars.voidsetCharInputChannel(CharChunk.CharInputChannel in)When the buffer is empty, read the data from the input channel.voidsetCharOutputChannel(CharChunk.CharOutputChannel out)When the buffer is full, write the data to the output channel.voidsetChars(char[] c, int off, int len)Sets the buffer to the specified subarray of characters.booleanstartsWith(String s)booleanstartsWithIgnoreCase(String s, int pos)Returns true if the buffer starts with the specified string.CharSequencesubSequence(int start, int end)intsubtract()intsubtract(char[] dest, int off, int len)StringtoString()StringtoStringInternal()-
Methods inherited from class org.apache.tomcat.util.buf.AbstractChunk
getEnd, getLength, getLimit, getLimitInternal, getOffset, getStart, hash, hashCode, indexOf, isNull, recycle, setEnd, setLimit, setOffset
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Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface java.lang.CharSequence
chars, codePoints
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Method Detail
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clone
public Object clone() throws CloneNotSupportedException
- Overrides:
clonein classObject- Throws:
CloneNotSupportedException
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allocate
public void allocate(int initial, int limit)
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setChars
public void setChars(char[] c, int off, int len)Sets the buffer to the specified subarray of characters.- Parameters:
c- the charactersoff- the start offset of the characterslen- the length of the characters
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getChars
public char[] getChars()
- Returns:
- the buffer.
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getBuffer
public char[] getBuffer()
- Returns:
- the buffer.
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setCharInputChannel
public void setCharInputChannel(CharChunk.CharInputChannel in)
When the buffer is empty, read the data from the input channel.- Parameters:
in- The input channel
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setCharOutputChannel
public void setCharOutputChannel(CharChunk.CharOutputChannel out)
When the buffer is full, write the data to the output channel. Also used when large amount of data is appended. If not set, the buffer will grow to the limit.- Parameters:
out- The output channel
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append
public void append(char c) throws IOException- Throws:
IOException
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append
public void append(CharChunk src) throws IOException
- Throws:
IOException
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append
public void append(char[] src, int off, int len) throws IOExceptionAdd data to the buffer.- Parameters:
src- Char arrayoff- Offsetlen- Length- Throws:
IOException- Writing overflow data to the output channel failed
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append
public void append(String s) throws IOException
Append a string to the buffer.- Parameters:
s- The string- Throws:
IOException- Writing overflow data to the output channel failed
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append
public void append(String s, int off, int len) throws IOException
Append a string to the buffer.- Parameters:
s- The stringoff- Offsetlen- Length- Throws:
IOException- Writing overflow data to the output channel failed
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subtract
public int subtract() throws IOException- Throws:
IOException
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subtract
public int subtract(char[] dest, int off, int len) throws IOException- Throws:
IOException
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flushBuffer
public void flushBuffer() throws IOExceptionSend the buffer to the sink. Called by append() when the limit is reached. You can also call it explicitly to force the data to be written.- Throws:
IOException- Writing overflow data to the output channel failed
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makeSpace
public void makeSpace(int count)
Make space for len chars. If len is small, allocate a reserve space too. Never grow bigger than the limit orAbstractChunk.ARRAY_MAX_SIZE.- Parameters:
count- The size
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toString
public String toString()
- Specified by:
toStringin interfaceCharSequence- Overrides:
toStringin classObject
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toStringInternal
public String toStringInternal()
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equals
public boolean equals(String s)
Compares the message bytes to the specified String object.- Parameters:
s- the String to compare- Returns:
trueif the comparison succeeded,falseotherwise
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equalsIgnoreCase
public boolean equalsIgnoreCase(String s)
Compares the message bytes to the specified String object.- Parameters:
s- the String to compare- Returns:
trueif the comparison succeeded,falseotherwise
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equals
public boolean equals(CharChunk cc)
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equals
public boolean equals(char[] b2, int off2, int len2)
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startsWith
public boolean startsWith(String s)
- Parameters:
s- The string- Returns:
trueif the message bytes starts with the specified string.
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startsWithIgnoreCase
public boolean startsWithIgnoreCase(String s, int pos)
Returns true if the buffer starts with the specified string.- Parameters:
s- the stringpos- The position- Returns:
trueif the start matches
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endsWith
public boolean endsWith(String s)
- Parameters:
s- The string- Returns:
trueif the message bytes end with the specified string.
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getBufferElement
protected int getBufferElement(int index)
- Specified by:
getBufferElementin classAbstractChunk
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indexOf
public int indexOf(char c)
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indexOf
public int indexOf(char c, int starting)Returns the first instance of the given character in this CharChunk starting at the specified char. If the character is not found, -1 is returned.- Parameters:
c- The characterstarting- The start position- Returns:
- The position of the first instance of the character or -1 if the character is not found.
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indexOf
public static int indexOf(char[] chars, int start, int end, char s)Returns the first instance of the given character in the given char array between the specified start and end.- Parameters:
chars- The array to searchstart- The point to start searching from in the arrayend- The point to stop searching in the arrays- The character to search for- Returns:
- The position of the first instance of the character or -1 if the character is not found.
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charAt
public char charAt(int index)
- Specified by:
charAtin interfaceCharSequence
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subSequence
public CharSequence subSequence(int start, int end)
- Specified by:
subSequencein interfaceCharSequence
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length
public int length()
- Specified by:
lengthin interfaceCharSequence
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