Examples of java.lang.CharSequence

java.lang.CharSequence
A CharSequence is a readable sequence of char values. This interface provides uniform, read-only access to many different kinds of char sequences. A char value represents a character in the Basic Multilingual Plane (BMP) or a surrogate. Refer to Unicode Character Representation for details.
This interface does not refine the general contracts of the {@link java.lang.Object#equals(java.lang.Object) equals} and {@link java.lang.Object#hashCode() hashCode} methods. The result of comparing twoobjects that implement CharSequence is therefore, in general, undefined. Each object may be implemented by a different class, and there is no guarantee that each class will be capable of testing its instances for equality with those of the other. It is therefore inappropriate to use arbitrary CharSequence instances as elements in a set or as keys in a map.
@author Mike McCloskey @version 1.9 05/11/17 @since 1.4 @spec JSR-51


        public boolean areEqual(Object o1, Object o2) {
            if ((o1 instanceof String) && (o2 instanceof String))
                return o1.equals(o2);
            if ((o1 instanceof CharSequence) && (o2 instanceof String)) {
                final CharSequence csq = (CharSequence) o1;
                final String str = (String) o2;
                final int length = str.length();
                if (csq.length() != length)
                    return false;
                for (int i = 0; i < length;) {
                    if (str.charAt(i) != csq.charAt(i++))
                        return false;
                }
                return true;
            }
            if ((o1 instanceof String) && (o2 instanceof CharSequence)) {
                final CharSequence csq = (CharSequence) o2;
                final String str = (String) o1;
                final int length = str.length();
                if (csq.length() != length)
                    return false;
                for (int i = 0; i < length;) {
                    if (str.charAt(i) != csq.charAt(i++))
                        return false;
                }
                return true;
            }
            if ((o1 == null) || (o2 == null))
                return o1 == o2;
            final CharSequence csq1 = (CharSequence) o1;
            final CharSequence csq2 = (CharSequence) o2;
            final int length = csq1.length();
            if (csq2.length() != length)
                return false;
            for (int i = 0; i < length;) {
                if (csq1.charAt(i) != csq2.charAt(i++))
                    return false;
            }
            return true;
        }

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            if (left instanceof String) {
                if (right instanceof String)
                    return ((String) left).compareTo((String) right);
                // Right must be a CharSequence.
                String seq1 = (String) left;
                CharSequence seq2 = (CharSequence) right;
                int i = 0;
                int n = Math.min(seq1.length(), seq2.length());
                while (n-- != 0) {
                    char c1 = seq1.charAt(i);
                    char c2 = seq2.charAt(i++);
                    if (c1 != c2)
                        return c1 - c2;
                }
                return seq1.length() - seq2.length();
            }
            if (right instanceof String)
                return -compare(right, left);


            // Both are CharSequence.
            CharSequence seq1 = (CharSequence) left;
            CharSequence seq2 = (CharSequence) right;
            int i = 0;
            int n = Math.min(seq1.length(), seq2.length());
            while (n-- != 0) {
                char c1 = seq1.charAt(i);
                char c2 = seq2.charAt(i++);
                if (c1 != c2)
                    return c1 - c2;
            }
            return seq1.length() - seq2.length();
        }

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            return (_attributes != null ? _attributes.getLength() : 0);
        }


        // Implements Attributes
        public String getURI(int index) {
            CharSequence chars = (_attributes != null ? _attributes.getURI(index) : null);
            return (chars != null ? chars.toString() : "");
        }

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            return (chars != null ? chars.toString() : "");
        }


        // Implements Attributes
        public String getLocalName(int index) {
            CharSequence chars = (_attributes != null ? _attributes.getLocalName(index) : null);
            return (chars != null ? chars.toString() : "");
        }

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            return (chars != null ? chars.toString() : "");
        }


        // Implements Attributes
        public String getQName(int index) {
            CharSequence chars = (_attributes != null ? _attributes.getQName(index) : null);
            return (chars != null ? chars.toString() : "");
        }

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            return (_attributes != null ? _attributes.getType(index).toString() : null);
        }


        // Implements Attributes
        public String getValue(int index) {
            CharSequence chars = (_attributes != null ? _attributes.getValue(index) : null);
            return (chars != null ? chars.toString() : null);
        }

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            return 1;
        }


        // Searches user defined entities.
        _tmp.setArray(buffer, start + 1, length - 2);
        CharSequence replacementText = (_entitiesMapping != null) ?
                (CharSequence) _entitiesMapping.get(_tmp) : null;
        if (replacementText == null)
            throw new XMLStreamException("Entity " + _tmp + " not recognized");
        int replacementTextLength = replacementText.length();
        for (int i = 0; i < replacementTextLength; i++) {
            buffer[start + i] = replacementText.charAt(i);
        }
        return replacementTextLength;
    }

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        // Sets the maximum length for replacement text.
        Collection values = entityToReplacementText.values();
        if (values instanceof FastCollection) { // Avoids allocating iterators.
             FastCollection fc = (FastCollection) values;
             for (Record r=fc.head(), t=fc.tail(); (r = r.getNext())!= t;) {
                 CharSequence value = (CharSequence) fc.valueOf(r);
                 if (_maxLength < value.length()) {
                     _maxLength = value.length();
                 }
             }
        } else {
            for (Iterator i=values.iterator(); i.hasNext();) {
                CharSequence value = (CharSequence) i.next();
                if (_maxLength < value.length()) {
                    _maxLength = value.length();
                }
            }
        }
        _entitiesMapping = entityToReplacementText;
    }

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            return (_attributes != null ? _attributes.getLength() : 0);
        }


        // Implements Attributes
        public String getURI(int index) {
            CharSequence chars = (_attributes != null ? _attributes
                    .getURI(index) : null);
            return (chars != null ? chars.toString() : "");
        }

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            return (chars != null ? chars.toString() : "");
        }


        // Implements Attributes
        public String getLocalName(int index) {
            CharSequence chars = (_attributes != null ? _attributes
                    .getLocalName(index) : null);
            return (chars != null ? chars.toString() : "");
        }

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