clazz, int index, E defaultValue) {
- try {
- Object val = this.opt(index);
- if (JSONObject.NULL.equals(val)) {
- return defaultValue;
- }
- if (clazz.isAssignableFrom(val.getClass())) {
- // we just checked it!
- @SuppressWarnings("unchecked")
- E myE = (E) val;
- return myE;
- }
- return Enum.valueOf(clazz, val.toString());
- } catch (IllegalArgumentException e) {
- return defaultValue;
- } catch (NullPointerException e) {
- return defaultValue;
- }
- }
-
-
- /**
- * Get the optional BigInteger value associated with an index. The
- * defaultValue is returned if there is no value for the index, or if the
- * value is not a number and cannot be converted to a number.
- *
- * @param index
- * The index must be between 0 and length() - 1.
- * @param defaultValue
- * The default value.
- * @return The value.
- */
- public BigInteger optBigInteger(int index, BigInteger defaultValue) {
- Object val = this.opt(index);
- if (JSONObject.NULL.equals(val)) {
- return defaultValue;
- }
- if (val instanceof BigInteger){
- return (BigInteger) val;
- }
- if (val instanceof BigDecimal){
- return ((BigDecimal) val).toBigInteger();
- }
- if (val instanceof Double || val instanceof Float){
- return new BigDecimal(((Number) val).doubleValue()).toBigInteger();
- }
- if (val instanceof Long || val instanceof Integer
- || val instanceof Short || val instanceof Byte){
- return BigInteger.valueOf(((Number) val).longValue());
- }
- try {
- final String valStr = val.toString();
- if(JSONObject.isDecimalNotation(valStr)) {
- return new BigDecimal(valStr).toBigInteger();
- }
- return new BigInteger(valStr);
- } catch (Exception e) {
- return defaultValue;
- }
- }
-
- /**
- * Get the optional BigDecimal value associated with an index. The
- * defaultValue is returned if there is no value for the index, or if the
- * value is not a number and cannot be converted to a number.
- *
- * @param index
- * The index must be between 0 and length() - 1.
- * @param defaultValue
- * The default value.
- * @return The value.
- */
- public BigDecimal optBigDecimal(int index, BigDecimal defaultValue) {
- Object val = this.opt(index);
- if (JSONObject.NULL.equals(val)) {
- return defaultValue;
- }
- if (val instanceof BigDecimal){
- return (BigDecimal) val;
- }
- if (val instanceof BigInteger){
- return new BigDecimal((BigInteger) val);
- }
- if (val instanceof Double || val instanceof Float){
- return new BigDecimal(((Number) val).doubleValue());
- }
- if (val instanceof Long || val instanceof Integer
- || val instanceof Short || val instanceof Byte){
- return new BigDecimal(((Number) val).longValue());
- }
- try {
- return new BigDecimal(val.toString());
- } catch (Exception e) {
- return defaultValue;
- }
- }
-
- /**
- * Get the optional JSONArray associated with an index.
- *
- * @param index
- * subscript
- * @return A JSONArray value, or null if the index has no value, or if the
- * value is not a JSONArray.
- */
- public JSONArray optJSONArray(int index) {
- Object o = this.opt(index);
- return o instanceof JSONArray ? (JSONArray) o : null;
- }
-
- /**
- * Get the optional JSONObject associated with an index. Null is returned if
- * the key is not found, or null if the index has no value, or if the value
- * is not a JSONObject.
- *
- * @param index
- * The index must be between 0 and length() - 1.
- * @return A JSONObject value.
- */
- public JSONObject optJSONObject(int index) {
- Object o = this.opt(index);
- return o instanceof JSONObject ? (JSONObject) o : null;
- }
-
- /**
- * Get the optional long value associated with an index. Zero is returned if
- * there is no value for the index, or if the value is not a number and
- * cannot be converted to a number.
- *
- * @param index
- * The index must be between 0 and length() - 1.
- * @return The value.
- */
- public long optLong(int index) {
- return this.optLong(index, 0);
- }
-
- /**
- * Get the optional long value associated with an index. The defaultValue is
- * returned if there is no value for the index, or if the value is not a
- * number and cannot be converted to a number.
- *
- * @param index
- * The index must be between 0 and length() - 1.
- * @param defaultValue
- * The default value.
- * @return The value.
- */
- public long optLong(int index, long defaultValue) {
- Object val = this.opt(index);
- if (JSONObject.NULL.equals(val)) {
- return defaultValue;
- }
- if (val instanceof Number){
- return ((Number) val).longValue();
- }
-
- if (val instanceof String) {
- try {
- return new BigDecimal(val.toString()).longValue();
- } catch (Exception e) {
- return defaultValue;
- }
- }
- return defaultValue;
- }
-
- /**
- * Get an optional {@link Number} value associated with a key, or null
- * if there is no such key or if the value is not a number. If the value is a string,
- * an attempt will be made to evaluate it as a number ({@link BigDecimal}). This method
- * would be used in cases where type coercion of the number value is unwanted.
- *
- * @param index
- * The index must be between 0 and length() - 1.
- * @return An object which is the value.
- */
- public Number optNumber(int index) {
- return this.optNumber(index, null);
- }
-
- /**
- * Get an optional {@link Number} value associated with a key, or the default if there
- * is no such key or if the value is not a number. If the value is a string,
- * an attempt will be made to evaluate it as a number ({@link BigDecimal}). This method
- * would be used in cases where type coercion of the number value is unwanted.
- *
- * @param index
- * The index must be between 0 and length() - 1.
- * @param defaultValue
- * The default.
- * @return An object which is the value.
- */
- public Number optNumber(int index, Number defaultValue) {
- Object val = this.opt(index);
- if (JSONObject.NULL.equals(val)) {
- return defaultValue;
- }
- if (val instanceof Number){
- return (Number) val;
- }
-
- if (val instanceof String) {
- try {
- return JSONObject.stringToNumber((String) val);
- } catch (Exception e) {
- return defaultValue;
- }
- }
- return defaultValue;
- }
-
- /**
- * Get the optional string value associated with an index. It returns an
- * empty string if there is no value at that index. If the value is not a
- * string and is not null, then it is converted to a string.
- *
- * @param index
- * The index must be between 0 and length() - 1.
- * @return A String value.
- */
- public String optString(int index) {
- return this.optString(index, "");
- }
-
- /**
- * Get the optional string associated with an index. The defaultValue is
- * returned if the key is not found.
- *
- * @param index
- * The index must be between 0 and length() - 1.
- * @param defaultValue
- * The default value.
- * @return A String value.
- */
- public String optString(int index, String defaultValue) {
- Object object = this.opt(index);
- return JSONObject.NULL.equals(object) ? defaultValue : object
- .toString();
- }
-
- /**
- * Append a boolean value. This increases the array's length by one.
- *
- * @param value
- * A boolean value.
- * @return this.
- */
- public JSONArray put(boolean value) {
- return this.put(value ? Boolean.TRUE : Boolean.FALSE);
- }
-
- /**
- * Put a value in the JSONArray, where the value will be a JSONArray which
- * is produced from a Collection.
- *
- * @param value
- * A Collection value.
- * @return this.
- * @throws JSONException
- * If the value is non-finite number.
- */
- public JSONArray put(Collection value) {
- return this.put(new JSONArray(value));
- }
-
- /**
- * Append a double value. This increases the array's length by one.
- *
- * @param value
- * A double value.
- * @return this.
- * @throws JSONException
- * if the value is not finite.
- */
- public JSONArray put(double value) throws JSONException {
- return this.put(Double.valueOf(value));
- }
-
- /**
- * Append a float value. This increases the array's length by one.
- *
- * @param value
- * A float value.
- * @return this.
- * @throws JSONException
- * if the value is not finite.
- */
- public JSONArray put(float value) throws JSONException {
- return this.put(Float.valueOf(value));
- }
-
- /**
- * Append an int value. This increases the array's length by one.
- *
- * @param value
- * An int value.
- * @return this.
- */
- public JSONArray put(int value) {
- return this.put(Integer.valueOf(value));
- }
-
- /**
- * Append an long value. This increases the array's length by one.
- *
- * @param value
- * A long value.
- * @return this.
- */
- public JSONArray put(long value) {
- return this.put(Long.valueOf(value));
- }
-
- /**
- * Put a value in the JSONArray, where the value will be a JSONObject which
- * is produced from a Map.
- *
- * @param value
- * A Map value.
- * @return this.
- * @throws JSONException
- * If a value in the map is non-finite number.
- * @throws NullPointerException
- * If a key in the map is null
- */
- public JSONArray put(Map value) {
- return this.put(new JSONObject(value));
- }
-
- /**
- * Append an object value. This increases the array's length by one.
- *
- * @param value
- * An object value. The value should be a Boolean, Double,
- * Integer, JSONArray, JSONObject, Long, or String, or the
- * JSONObject.NULL object.
- * @return this.
- * @throws JSONException
- * If the value is non-finite number.
- */
- public JSONArray put(Object value) {
- JSONObject.testValidity(value);
- this.myArrayList.add(value);
- return this;
- }
-
- /**
- * Put or replace a boolean value in the JSONArray. If the index is greater
- * than the length of the JSONArray, then null elements will be added as
- * necessary to pad it out.
- *
- * @param index
- * The subscript.
- * @param value
- * A boolean value.
- * @return this.
- * @throws JSONException
- * If the index is negative.
- */
- public JSONArray put(int index, boolean value) throws JSONException {
- return this.put(index, value ? Boolean.TRUE : Boolean.FALSE);
- }
-
- /**
- * Put a value in the JSONArray, where the value will be a JSONArray which
- * is produced from a Collection.
- *
- * @param index
- * The subscript.
- * @param value
- * A Collection value.
- * @return this.
- * @throws JSONException
- * If the index is negative or if the value is non-finite.
- */
- public JSONArray put(int index, Collection value) throws JSONException {
- return this.put(index, new JSONArray(value));
- }
-
- /**
- * Put or replace a double value. If the index is greater than the length of
- * the JSONArray, then null elements will be added as necessary to pad it
- * out.
- *
- * @param index
- * The subscript.
- * @param value
- * A double value.
- * @return this.
- * @throws JSONException
- * If the index is negative or if the value is non-finite.
- */
- public JSONArray put(int index, double value) throws JSONException {
- return this.put(index, Double.valueOf(value));
- }
-
- /**
- * Put or replace a float value. If the index is greater than the length of
- * the JSONArray, then null elements will be added as necessary to pad it
- * out.
- *
- * @param index
- * The subscript.
- * @param value
- * A float value.
- * @return this.
- * @throws JSONException
- * If the index is negative or if the value is non-finite.
- */
- public JSONArray put(int index, float value) throws JSONException {
- return this.put(index, Float.valueOf(value));
- }
-
- /**
- * Put or replace an int value. If the index is greater than the length of
- * the JSONArray, then null elements will be added as necessary to pad it
- * out.
- *
- * @param index
- * The subscript.
- * @param value
- * An int value.
- * @return this.
- * @throws JSONException
- * If the index is negative.
- */
- public JSONArray put(int index, int value) throws JSONException {
- return this.put(index, Integer.valueOf(value));
- }
-
- /**
- * Put or replace a long value. If the index is greater than the length of
- * the JSONArray, then null elements will be added as necessary to pad it
- * out.
- *
- * @param index
- * The subscript.
- * @param value
- * A long value.
- * @return this.
- * @throws JSONException
- * If the index is negative.
- */
- public JSONArray put(int index, long value) throws JSONException {
- return this.put(index, Long.valueOf(value));
- }
-
- /**
- * Put a value in the JSONArray, where the value will be a JSONObject that
- * is produced from a Map.
- *
- * @param index
- * The subscript.
- * @param value
- * The Map value.
- * @return this.
- * @throws JSONException
- * If the index is negative or if the the value is an invalid
- * number.
- * @throws NullPointerException
- * If a key in the map is null
- */
- public JSONArray put(int index, Map value) throws JSONException {
- this.put(index, new JSONObject(value));
- return this;
- }
-
- /**
- * Put or replace an object value in the JSONArray. If the index is greater
- * than the length of the JSONArray, then null elements will be added as
- * necessary to pad it out.
- *
- * @param index
- * The subscript.
- * @param value
- * The value to put into the array. The value should be a
- * Boolean, Double, Integer, JSONArray, JSONObject, Long, or
- * String, or the JSONObject.NULL object.
- * @return this.
- * @throws JSONException
- * If the index is negative or if the the value is an invalid
- * number.
- */
- public JSONArray put(int index, Object value) throws JSONException {
- if (index < 0) {
- throw new JSONException("JSONArray[" + index + "] not found.");
- }
- if (index < this.length()) {
- JSONObject.testValidity(value);
- this.myArrayList.set(index, value);
- return this;
- }
- if(index == this.length()){
- // simple append
- return this.put(value);
- }
- // if we are inserting past the length, we want to grow the array all at once
- // instead of incrementally.
- this.myArrayList.ensureCapacity(index + 1);
- while (index != this.length()) {
- // we don't need to test validity of NULL objects
- this.myArrayList.add(JSONObject.NULL);
- }
- return this.put(value);
- }
-
- /**
- * Creates a JSONPointer using an initialization string and tries to
- * match it to an item within this JSONArray. For example, given a
- * JSONArray initialized with this document:
- *
- * [
- * {"b":"c"}
- * ]
- *
- * and this JSONPointer string:
- *
- * "/0/b"
- *
- * Then this method will return the String "c"
- * A JSONPointerException may be thrown from code called by this method.
- *
- * @param jsonPointer string that can be used to create a JSONPointer
- * @return the item matched by the JSONPointer, otherwise null
- */
- public Object query(String jsonPointer) {
- return query(new JSONPointer(jsonPointer));
- }
-
- /**
- * Uses a uaer initialized JSONPointer and tries to
- * match it to an item whithin this JSONArray. For example, given a
- * JSONArray initialized with this document:
- *
- * [
- * {"b":"c"}
- * ]
- *
- * and this JSONPointer:
- *
- * "/0/b"
- *
- * Then this method will return the String "c"
- * A JSONPointerException may be thrown from code called by this method.
- *
- * @param jsonPointer string that can be used to create a JSONPointer
- * @return the item matched by the JSONPointer, otherwise null
- */
- public Object query(JSONPointer jsonPointer) {
- return jsonPointer.queryFrom(this);
- }
-
- /**
- * Queries and returns a value from this object using {@code jsonPointer}, or
- * returns null if the query fails due to a missing key.
- *
- * @param jsonPointer the string representation of the JSON pointer
- * @return the queried value or {@code null}
- * @throws IllegalArgumentException if {@code jsonPointer} has invalid syntax
- */
- public Object optQuery(String jsonPointer) {
- return optQuery(new JSONPointer(jsonPointer));
- }
-
- /**
- * Queries and returns a value from this object using {@code jsonPointer}, or
- * returns null if the query fails due to a missing key.
- *
- * @param jsonPointer The JSON pointer
- * @return the queried value or {@code null}
- * @throws IllegalArgumentException if {@code jsonPointer} has invalid syntax
- */
- public Object optQuery(JSONPointer jsonPointer) {
- try {
- return jsonPointer.queryFrom(this);
- } catch (JSONPointerException e) {
- return null;
- }
- }
-
- /**
- * Remove an index and close the hole.
- *
- * @param index
- * The index of the element to be removed.
- * @return The value that was associated with the index, or null if there
- * was no value.
- */
- public Object remove(int index) {
- return index >= 0 && index < this.length()
- ? this.myArrayList.remove(index)
- : null;
- }
-
- /**
- * Determine if two JSONArrays are similar.
- * They must contain similar sequences.
- *
- * @param other The other JSONArray
- * @return true if they are equal
- */
- public boolean similar(Object other) {
- if (!(other instanceof JSONArray)) {
- return false;
- }
- int len = this.length();
- if (len != ((JSONArray)other).length()) {
- return false;
- }
- for (int i = 0; i < len; i += 1) {
- Object valueThis = this.myArrayList.get(i);
- Object valueOther = ((JSONArray)other).myArrayList.get(i);
- if(valueThis == valueOther) {
- continue;
- }
- if(valueThis == null) {
- return false;
- }
- if (valueThis instanceof JSONObject) {
- if (!((JSONObject)valueThis).similar(valueOther)) {
- return false;
- }
- } else if (valueThis instanceof JSONArray) {
- if (!((JSONArray)valueThis).similar(valueOther)) {
- return false;
- }
- } else if (!valueThis.equals(valueOther)) {
- return false;
- }
- }
- return true;
- }
-
- /**
- * Produce a JSONObject by combining a JSONArray of names with the values of
- * this JSONArray.
- *
- * @param names
- * A JSONArray containing a list of key strings. These will be
- * paired with the values.
- * @return A JSONObject, or null if there are no names or if this JSONArray
- * has no values.
- * @throws JSONException
- * If any of the names are null.
- */
- public JSONObject toJSONObject(JSONArray names) throws JSONException {
- if (names == null || names.isEmpty() || this.isEmpty()) {
- return null;
- }
- JSONObject jo = new JSONObject(names.length());
- for (int i = 0; i < names.length(); i += 1) {
- jo.put(names.getString(i), this.opt(i));
- }
- return jo;
- }
-
- /**
- * Make a JSON text of this JSONArray. For compactness, no unnecessary
- * whitespace is added. If it is not possible to produce a syntactically
- * correct JSON text then null will be returned instead. This could occur if
- * the array contains an invalid number.
- *
- * Warning: This method assumes that the data structure is acyclical.
- *
- *
- * @return a printable, displayable, transmittable representation of the
- * array.
- */
- @Override
- public String toString() {
- try {
- return this.toString(0);
- } catch (Exception e) {
- return null;
- }
- }
-
- /**
- * Make a pretty-printed JSON text of this JSONArray.
- *
- *
If indentFactor > 0 and the {@link JSONArray} has only
- * one element, then the array will be output on a single line:
- *
{@code [1]}
- *
- * If an array has 2 or more elements, then it will be output across
- * multiple lines:
{@code
- * [
- * 1,
- * "value 2",
- * 3
- * ]
- * }
- *
- * Warning: This method assumes that the data structure is acyclical.
- *
- *
- * @param indentFactor
- * The number of spaces to add to each level of indentation.
- * @return a printable, displayable, transmittable representation of the
- * object, beginning with [ (left
- * bracket) and ending with ]
- * (right bracket) .
- * @throws JSONException
- */
- public String toString(int indentFactor) throws JSONException {
- StringWriter sw = new StringWriter();
- synchronized (sw.getBuffer()) {
- return this.write(sw, indentFactor, 0).toString();
- }
- }
-
- /**
- * Write the contents of the JSONArray as JSON text to a writer. For
- * compactness, no whitespace is added.
- *
- * Warning: This method assumes that the data structure is acyclical.
- *
- *
- * @return The writer.
- * @throws JSONException
- */
- public Writer write(Writer writer) throws JSONException {
- return this.write(writer, 0, 0);
- }
-
- /**
- * Write the contents of the JSONArray as JSON text to a writer.
- *
- *
If indentFactor > 0 and the {@link JSONArray} has only
- * one element, then the array will be output on a single line:
- *
{@code [1]}
- *
- * If an array has 2 or more elements, then it will be output across
- * multiple lines:
{@code
- * [
- * 1,
- * "value 2",
- * 3
- * ]
- * }
- *
- * Warning: This method assumes that the data structure is acyclical.
- *
- *
- * @param writer
- * Writes the serialized JSON
- * @param indentFactor
- * The number of spaces to add to each level of indentation.
- * @param indent
- * The indentation of the top level.
- * @return The writer.
- * @throws JSONException
- */
- public Writer write(Writer writer, int indentFactor, int indent)
- throws JSONException {
- try {
- boolean commanate = false;
- int length = this.length();
- writer.write('[');
-
- if (length == 1) {
- try {
- JSONObject.writeValue(writer, this.myArrayList.get(0),
- indentFactor, indent);
- } catch (Exception e) {
- throw new JSONException("Unable to write JSONArray value at index: 0", e);
- }
- } else if (length != 0) {
- final int newindent = indent + indentFactor;
-
- for (int i = 0; i < length; i += 1) {
- if (commanate) {
- writer.write(',');
- }
- if (indentFactor > 0) {
- writer.write('\n');
- }
- JSONObject.indent(writer, newindent);
- try {
- JSONObject.writeValue(writer, this.myArrayList.get(i),
- indentFactor, newindent);
- } catch (Exception e) {
- throw new JSONException("Unable to write JSONArray value at index: " + i, e);
- }
- commanate = true;
- }
- if (indentFactor > 0) {
- writer.write('\n');
- }
- JSONObject.indent(writer, indent);
- }
- writer.write(']');
- return writer;
- } catch (IOException e) {
- throw new JSONException(e);
- }
- }
-
- /**
- * Returns a java.util.List containing all of the elements in this array.
- * If an element in the array is a JSONArray or JSONObject it will also
- * be converted.
- *
- * Warning: This method assumes that the data structure is acyclical.
- *
- * @return a java.util.List containing the elements of this array
- */
- public List toList() {
- List results = new ArrayList(this.myArrayList.size());
- for (Object element : this.myArrayList) {
- if (element == null || JSONObject.NULL.equals(element)) {
- results.add(null);
- } else if (element instanceof JSONArray) {
- results.add(((JSONArray) element).toList());
- } else if (element instanceof JSONObject) {
- results.add(((JSONObject) element).toMap());
- } else {
- results.add(element);
- }
- }
- return results;
- }
-
- /**
- * Check if JSONArray is empty.
- *
- * @return true if JSONArray is empty, otherwise false.
- */
- public boolean isEmpty() {
- return myArrayList.isEmpty();
- }
-
-}