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package processing.data;
// This code has been modified heavily to more closely match the rest of the
// Processing API. In the spirit of the rest of the project, where we try to
// keep the API as simple as possible, we have erred on the side of being
// conservative in choosing which functions to include, since we haven't yet
// decided what's truly necessary. Power users looking for a full-featured
// version can use the original version from json.org, or one of the many
// other APIs that are available. As with all Processing API, if there's a
// function that should be added, please let use know, and have others vote:
// http://code.google.com/p/processing/issues/list
/*
Copyright (c) 2002 JSON.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
The Software shall be used for Good, not Evil.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Iterator;
import processing.core.PApplet;
/**
* A <b>JSONArray</b> stores an array of JSON objects. <b>JSONArray</b>s can
* be generated from scratch, dynamically, or using data from an existing file.
* JSON can also be output and saved to disk, as in the example above.
*
* <h3>Advanced</h3>
* A JSONArray is an ordered sequence of values. Its external text form is a
* string wrapped in square brackets with commas separating the values. The
* internal form is an object having <code>get</code> and <code>opt</code>
* methods for accessing the values by index, and <code>put</code> methods for
* adding or replacing values. The values can be any of these types:
* <code>Boolean</code>, <code>JSONArray</code>, <code>JSONObject</code>,
* <code>Number</code>, <code>String</code>, or the
* <code>JSONObject.NULL object</code>.
* <p>
* The constructor can convert a JSON text into a Java object. The
* <code>toString</code> method converts to JSON text.
* <p>
* A <code>get</code> method returns a value if one can be found, and throws an
* exception if one cannot be found. An <code>opt</code> method returns a
* default value instead of throwing an exception, and so is useful for
* obtaining optional values.
* <p>
* The generic <code>get()</code> and <code>opt()</code> methods return an
* object which you can cast or query for type. There are also typed
* <code>get</code> and <code>opt</code> methods that do type checking and type
* coercion for you.
* <p>
* The texts produced by the <code>toString</code> methods strictly conform to
* JSON syntax rules. The constructors are more forgiving in the texts they will
* accept:
* <ul>
* <li>An extra <code>,</code> <small>(comma)</small> may appear just
* before the closing bracket.</li>
* <li>The <code>null</code> value will be inserted when there is <code>,</code>
* <small>(comma)</small> elision.</li>
* <li>Strings may be quoted with <code>'</code> <small>(single
* quote)</small>.</li>
* <li>Strings do not need to be quoted at all if they do not begin with a quote
* or single quote, and if they do not contain leading or trailing spaces, and
* if they do not contain any of these characters:
* <code>{ } [ ] / \ : , = ; #</code> and if they do not look like numbers and
* if they are not the reserved words <code>true</code>, <code>false</code>, or
* <code>null</code>.</li>
* <li>Values can be separated by <code>;</code> <small>(semicolon)</small> as
* well as by <code>,</code> <small>(comma)</small>.</li>
* </ul>
*
* @author JSON.org
* @version 2012-11-13
* @webref data:composite
* @webBrief A JSONArray is an ordered sequence of values
* @see JSONObject
* @see PApplet#loadJSONObject(String)
* @see PApplet#loadJSONArray(String)
* @see PApplet#saveJSONObject(JSONObject, String)
* @see PApplet#saveJSONArray(JSONArray, String)
*/
public class JSONArray {
/**
* The arrayList where the JSONArray's properties are kept.
*/
private final ArrayList<Object> myArrayList;
/**
* Construct an empty JSONArray.
*/
public JSONArray() {
this.myArrayList = new ArrayList<>();
}
/**
* @nowebref
*/
public JSONArray(Reader reader) {
this(new JSONTokener(reader));
}
/**
* Construct a JSONArray from a JSONTokener.
*
* @param x A JSONTokener
* @throws RuntimeException If there is a syntax error.
* @nowebref
*/
protected JSONArray(JSONTokener x) {
this();
if (x.nextClean() != '[') {
throw new RuntimeException("A JSONArray text must start with '['");
}
if (x.nextClean() != ']') {
x.back();
for (;;) {
if (x.nextClean() == ',') {
x.back();
myArrayList.add(JSONObject.NULL);
} else {
x.back();
myArrayList.add(x.nextValue());
}
switch (x.nextClean()) {
case ';':
case ',':
if (x.nextClean() == ']') {
return;
}
x.back();
break;
case ']':
return;
default:
throw new RuntimeException("Expected a ',' or ']'");
}
}
}
}
/**
* @nowebref
*/
public JSONArray(IntList list) {
myArrayList = new ArrayList<>();
for (int item : list.values()) {
myArrayList.add(Integer.valueOf(item));
}
}
/**
* @nowebref
*/
public JSONArray(FloatList list) {
myArrayList = new ArrayList<>();
for (float item : list.values()) {
myArrayList.add(Float.valueOf(item));
}
}
/**
* @nowebref
*/
public JSONArray(StringList list) {
myArrayList = new ArrayList<>();
for (String item : list.values()) {
myArrayList.add(item);
}
}
/**
* Construct a JSONArray from a source JSON text.
* @param source A string that begins with
* <code>[</code> <small>(left bracket)</small>
* and ends with <code>]</code> <small>(right bracket)</small>.
* @return {@code null} if there is a syntax error.
*/
static public JSONArray parse(String source) {
try {
return new JSONArray(new JSONTokener(source));
} catch (Exception e) {
return null;
}
}
// /**
// * Construct a JSONArray from a Collection.
// * @param collection A Collection.
// */
// public JSONArray(Collection collection) {
// myArrayList = new ArrayList<Object>();
// if (collection != null) {
// Iterator iter = collection.iterator();
// while (iter.hasNext()) {
// myArrayList.add(JSONObject.wrap(iter.next()));
// }
// }
// }
// TODO not decided whether we keep this one, but used heavily by JSONObject
/**
* Construct a JSONArray from an array
* @throws RuntimeException If not an array.
*/
protected JSONArray(Object array) {
this();
if (array.getClass().isArray()) {
int length = Array.getLength(array);
for (int i = 0; i < length; i += 1) {
this.append(JSONObject.wrap(Array.get(array, i)));
}
} else {
throw new RuntimeException("JSONArray initial value should be a string or collection or array.");
}
}
/**
* Get the optional object value associated with an index.
* @param index must be between 0 and length() - 1
* @return An object value, or null if there is no
* object at that index.
*/
private Object opt(int index) {
if (index < 0 || index >= this.size()) {
return null;
}
return myArrayList.get(index);
}
/**
* Get the object value associated with an index.
* @param index must be between 0 and length() - 1
* @return An object value.
* @throws RuntimeException If there is no value for the index.
*/
public Object get(int index) {
Object object = opt(index);
if (object == null) {
throw new RuntimeException("JSONArray[" + index + "] not found.");
}
return object;
}
/**
* Gets the <b>String</b> value associated with the specified index.
*
* @webref jsonarray:method
* @webBrief Gets the String value associated with an index
* @param index must be between 0 and length() - 1
* @return A string value.
* @throws RuntimeException If there is no string value for the index.
* @see JSONArray#getInt(int)
* @see JSONArray#getFloat(int)
* @see JSONArray#getBoolean(int)
*/
public String getString(int index) {
Object object = this.get(index);
if (object instanceof String) {
return (String)object;
}
throw new RuntimeException("JSONArray[" + index + "] not a string.");
}
/**
* 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 getString(int index, String defaultValue) {
Object object = this.opt(index);
return JSONObject.NULL.equals(object) ? defaultValue : object.toString();
}
/**
* Gets the int value associated with the specified index.
*
* @webref jsonarray:method
* @webBrief Gets the int value associated with the specified index
* @param index must be between 0 and length() - 1
* @return The value.
* @throws RuntimeException If the key is not found or if the value is not a number.
* @see JSONArray#getFloat(int)
* @see JSONArray#getString(int)
* @see JSONArray#getBoolean(int)
*/
public int getInt(int index) {
Object object = this.get(index);
try {
return object instanceof Number
? ((Number)object).intValue()
: Integer.parseInt((String)object);
} catch (Exception e) {
throw new RuntimeException("JSONArray[" + index + "] is not a number.");
}
}
/**
* Get the optional int 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 int getInt(int index, int defaultValue) {
try {
return getInt(index);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Get the long value associated with an index.
*
* @param index The index must be between 0 and length() - 1
* @return The value.
* @throws RuntimeException If the key is not found or if the value cannot
* be converted to a number.
*/
public long getLong(int index) {
Object object = this.get(index);
try {
return object instanceof Number
? ((Number)object).longValue()
: Long.parseLong((String)object);
} catch (Exception e) {
throw new RuntimeException("JSONArray[" + index + "] is not a number.");
}
}
/**
* 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 getLong(int index, long defaultValue) {
try {
return this.getLong(index);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Gets the float value associated with the specified index.
*
* @webref jsonarray:method
* @webBrief Gets the float value associated with the specified index
* @param index must be between 0 and length() - 1
* @see JSONArray#getInt(int)
* @see JSONArray#getString(int)
* @see JSONArray#getBoolean(int)
*/
public float getFloat(int index) {
return (float) getDouble(index);
}
public float getFloat(int index, float defaultValue) {
try {
return getFloat(index);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Get the double value associated with an index.
*
* @param index must be between 0 and length() - 1
* @return The value.
* @throws RuntimeException If the key is not found or if the value cannot
* be converted to a number.
*/
public double getDouble(int index) {
Object object = this.get(index);
try {
return object instanceof Number
? ((Number)object).doubleValue()
: Double.parseDouble((String)object);
} catch (Exception e) {
throw new RuntimeException("JSONArray[" + index + "] is not a number.");
}
}
/**
* Get the optional double 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 subscript
* @param defaultValue The default value.
* @return The value.
*/
public double getDouble(int index, double defaultValue) {
try {
return this.getDouble(index);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Gets the boolean value associated with the specified index.
*
* @webref jsonarray:method
* @webBrief Gets the boolean value associated with the specified index
* @param index must be between 0 and length() - 1
* @return The truth.
* @throws RuntimeException If there is no value for the index or if the
* value is not convertible to boolean.
* @see JSONArray#getInt(int)
* @see JSONArray#getFloat(int)
* @see JSONArray#getString(int)
*/
public boolean getBoolean(int index) {
Object object = this.get(index);
if (object.equals(Boolean.FALSE) ||
(object instanceof String &&
((String)object).equalsIgnoreCase("false"))) {
return false;
} else if (object.equals(Boolean.TRUE) ||
(object instanceof String &&
((String)object).equalsIgnoreCase("true"))) {
return true;
}
throw new RuntimeException("JSONArray[" + index + "] is not a boolean.");
}
/**
* Get the optional boolean value associated with an index.
* It returns the defaultValue if there is no value at that index or if
* it is not a Boolean or the String "true" or "false" (case insensitive).
*
* @param index The index must be between 0 and length() - 1.
* @param defaultValue A boolean default.
* @return The truth.
*/
public boolean getBoolean(int index, boolean defaultValue) {
try {
return getBoolean(index);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Retrieves the <b>JSONArray</b> with the associated index value.
*
* @webref jsonobject:method
* @webBrief Retrieves the <b>JSONArray</b> with the associated index value
* @param index must be between 0 and length() - 1
* @return A JSONArray value.
* @throws RuntimeException If there is no value for the index. or if the
* value is not a JSONArray
* @see JSONArray#getJSONObject(int)
* @see JSONArray#setJSONObject(int, JSONObject)
* @see JSONArray#setJSONArray(int, JSONArray)
*/
public JSONArray getJSONArray(int index) {
Object object = this.get(index);
if (object instanceof JSONArray) {
return (JSONArray)object;
}
throw new RuntimeException("JSONArray[" + index + "] is not a JSONArray.");
}
public JSONArray getJSONArray(int index, JSONArray defaultValue) {
try {
return getJSONArray(index);
} catch (Exception e) {
return defaultValue;
}
}
/**
* Retrieves the <b>JSONObject</b> with the associated index value.
*
* @webref jsonobject:method
* @webBrief Retrieves the <b>JSONObject</b> with the associated index value
* @param index the index value of the object to get
* @return A JSONObject value.
* @throws RuntimeException If there is no value for the index or if the
* value is not a JSONObject
* @see JSONArray#getJSONArray(int)
* @see JSONArray#setJSONObject(int, JSONObject)
* @see JSONArray#setJSONArray(int, JSONArray)
*/
public JSONObject getJSONObject(int index) {
Object object = this.get(index);
if (object instanceof JSONObject) {
return (JSONObject)object;
}
throw new RuntimeException("JSONArray[" + index + "] is not a JSONObject.");
}
public JSONObject getJSONObject(int index, JSONObject defaultValue) {
try {
return getJSONObject(index);
} catch (Exception e) {
return defaultValue;
}
}
public Iterable<Boolean> booleanValues() {
return () -> new Iterator<>() {
int index = -1;
public Boolean next() {
return getBoolean(++index);
}
public boolean hasNext() {
return index+1 < size();
}
};
}
public Iterable<Integer> intValues() {
return () -> new Iterator<>() {
int index = -1;
public Integer next() {
return getInt(++index);
}
public boolean hasNext() {
return index+1 < size();
}
};
}
public Iterable<Long> longValues() {
return () -> new Iterator<>() {
int index = -1;
public Long next() {
return getLong(++index);
}
public boolean hasNext() {
return index+1 < size();
}
};
}
public Iterable<Float> floatValues() {
return () -> new Iterator<>() {
int index = -1;
public Float next() {
return getFloat(++index);
}
public boolean hasNext() {
return index+1 < size();
}
};
}
public Iterable<Double> doubleValues() {
return () -> new Iterator<>() {
int index = -1;
public Double next() {
return getDouble(++index);
}
public boolean hasNext() {
return index+1 < size();
}
};
}
public Iterable<JSONArray> arrayValues() {
return () -> new Iterator<>() {
int index = -1;
public JSONArray next() {
return getJSONArray(++index);
}
public boolean hasNext() {
return index+1 < size();
}
};
}
public Iterable<JSONObject> objectValues() {
return () -> new Iterator<>() {
int index = -1;
public JSONObject next() {
return getJSONObject(++index);
}
public boolean hasNext() {
return index+1 < size();
}
};
}
/** Use toStringArray() instead. */
@Deprecated
public String[] getStringArray() {
return toStringArray();
}
/**
* Returns the entire <b>JSONArray</b> as an array of <b>Strings</b>.
* (All values in the array must be of the <b>String</b> type.)
*
* @webref jsonarray:method
* @webBrief Returns the entire <b>JSONArray</b> as an array of <b>Strings</b>
* @see JSONArray#getIntArray()
*/
public String[] toStringArray() {
String[] outgoing = new String[size()];
for (int i = 0; i < size(); i++) {
outgoing[i] = getString(i);
}
return outgoing;
}
public StringList toStringList() {
return new StringList(getStringArray());
}
/** Use toIntArray() instead. */
@Deprecated
public int[] getIntArray() {
return toIntArray();
}
/**
* Returns the entire <b>JSONArray</b> as an array of <b>ints</b>.
* (All values in the array must be of the int type.)
*
* @webref jsonarray:method
* @webBrief Returns the entire <b>JSONArray</b> as an array of <b>ints</b>
* @see JSONArray#getStringArray()
*/
public int[] toIntArray() {
int[] outgoing = new int[size()];
for (int i = 0; i < size(); i++) {
outgoing[i] = getInt(i);
}
return outgoing;
}
public IntList toIntList() {
return new IntList(toIntArray());
}
/** Use toLongArray() instead. */
@Deprecated
public long[] getLongArray() {
return toLongArray();
}
/** Get this entire array as a long array. Everything must be an long. */
public long[] toLongArray() {
long[] outgoing = new long[size()];
for (int i = 0; i < size(); i++) {
outgoing[i] = getLong(i);
}
return outgoing;
}
public LongList toLongList() {
return new LongList(toLongArray());
}
/** Use toFloatArray() instead. */
@Deprecated
public float[] getFloatArray() {
return toFloatArray();
}
/** Get this entire array as a float array. Everything must be an float. */
public float[] toFloatArray() {
float[] outgoing = new float[size()];
for (int i = 0; i < size(); i++) {
outgoing[i] = getFloat(i);
}
return outgoing;
}
public FloatList toFloatList() {
return new FloatList(toFloatArray());
}
/** Use toDoubleArray() instead. */
@Deprecated
public double[] getDoubleArray() {
return toDoubleArray();
}
/** Get this entire array as a double array. Everything must be an double. */
public double[] toDoubleArray() {
double[] outgoing = new double[size()];
for (int i = 0; i < size(); i++) {
outgoing[i] = getDouble(i);
}
return outgoing;
}
public DoubleList toDoubleList() {
return new DoubleList(toDoubleArray());
}
/** Use toBooleanArray() instead. */
public boolean[] getBooleanArray() {
return toBooleanArray();
}
/** Get this entire array as a boolean array. Everything must be a boolean. */
public boolean[] toBooleanArray() {
boolean[] outgoing = new boolean[size()];
for (int i = 0; i < size(); i++) {
outgoing[i] = getBoolean(i);
}
return outgoing;
}
// /**
// * Get the optional boolean value associated with an index.
// * It returns false if there is no value at that index,
// * or if the value is not Boolean.TRUE or the String "true".
// *
// * @param index The index must be between 0 and length() - 1.
// * @return The truth.
// */
// public boolean optBoolean(int index) {
// return this.optBoolean(index, false);
// }
//
//
// /**
// * Get the optional double value associated with an index.
// * NaN 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 double optDouble(int index) {
// return this.optDouble(index, Double.NaN);
// }
//
//
// /**
// * Get the optional int 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 int optInt(int index) {
// return this.optInt(index, 0);
// }
//
//
// /**
// * 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 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 coverted 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, "");
// }
/**
* Appends a new value to the <b>JSONArray</b>, increasing the array's length
* by one. New values may be of the following types: <b>int</b>, <b>float</b>, <b>String</b>,
* <b>boolean</b>, <b>JSONObject</b>, or <b>JSONArray</b>.
*
* @webref jsonarray:method
* @webBrief Appends a value, increasing the array's length by one
* @param value a String value
* @return this.
* @see JSONArray#size()
* @see JSONArray#remove(int)
*/
public JSONArray append(String value) {
this.append((Object)value);
return this;
}
/**
* Append an int value. This increases the array's length by one.
*
* @param value an int value
* @return this.
*/
public JSONArray append(int value) {
this.append(Integer.valueOf(value));
return this;
}
/**
* Append an long value. This increases the array's length by one.
*
* @nowebref
* @param value A long value.
* @return this.
*/
public JSONArray append(long value) {
this.append(Long.valueOf(value));
return this;
}
/**
* Append a float value. This increases the array's length by one.
* This will store the value as a double, since there are no floats in JSON.
*
* @param value a float value
* @throws RuntimeException if the value is not finite.
* @return this.
*/
public JSONArray append(float value) {
return append((double) value);
}
/**
* Append a double value. This increases the array's length by one.
*
* @nowebref
* @param value A double value.
* @throws RuntimeException if the value is not finite.
* @return this.
*/
public JSONArray append(double value) {
Double d = value;
JSONObject.testValidity(d);
this.append(d);
return this;
}
/**
* Append a boolean value. This increases the array's length by one.
*
* @param value a boolean value
* @return this.
*/
public JSONArray append(boolean value) {
this.append(value ? Boolean.TRUE : Boolean.FALSE);
return this;
}
// /**
// * 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.
// */
// public JSONArray append(Collection value) {
// this.append(new JSONArray(value));
// return this;
// }
// /**
// * 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.
// */
// public JSONArray append(Map value) {
// this.append(new JSONObject(value));
// return this;
// }
/**
* @param value a JSONArray value
*/
public JSONArray append(JSONArray value) {
myArrayList.add(value);
return this;
}
/**
* @param value a JSONObject value
*/
public JSONArray append(JSONObject value) {
myArrayList.add(value);
return this;
}