org.jboss.resteasy.reactive.common.util.ArrayCharSequence Maven / Gradle / Ivy
package org.jboss.resteasy.reactive.common.util;
/**
* A CharSequence backed by a char[] (no copy on creation)
*
*/
public class ArrayCharSequence implements CharSequence {
private final char[] buf;
private final int offset;
private final int count;
public ArrayCharSequence(final char[] buff) {
this(buff, 0, buff.length);
}
public ArrayCharSequence(final char[] buff, final int count) {
this(buff, 0, count);
}
public ArrayCharSequence(final char[] buff, final int offset, final int count) {
this.buf = buff;
this.offset = offset;
this.count = count;
}
public char charAt(int index) {
if (index < 0 || index >= count) {
throw new StringIndexOutOfBoundsException(index);
}
return buf[offset + index];
}
public int length() {
return count;
}
public CharSequence subSequence(int beginIndex, int endIndex) {
if (beginIndex < 0) {
throw new StringIndexOutOfBoundsException(beginIndex);
}
if (endIndex > count) {
throw new StringIndexOutOfBoundsException(endIndex);
}
if (beginIndex > endIndex) {
throw new StringIndexOutOfBoundsException(endIndex - beginIndex);
}
return ((beginIndex == 0) && (endIndex == count))
? this
: new ArrayCharSequence(buf, offset + beginIndex, endIndex - beginIndex);
}
public String toString() {
return new String(this.buf, this.offset, this.count);
}
}