erik/JSON-java
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reduces the use of unnecessary exceptions

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Simulant 2016-07-08 22:17:05 +02:00
parent 04181fb6e2
commit 7627d40d10
2 changed files with 336 additions and 216 deletions
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244
JSONArray.java
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@ -72,13 +72,13 @@ import java.util.Map;
* <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>{ } [ ] / \ : , #</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>
* </ul>
*
* @author JSON.org
* @version 2016-05-20
* @version 2016-07-08
*/
public class JSONArray implements Iterable<Object> {
@ -156,9 +156,9 @@ public class JSONArray implements Iterable<Object> {
public JSONArray(Collection<?> collection) {
this.myArrayList = new ArrayList<Object>();
if (collection != null) {
for (Object o: collection){
this.myArrayList.add(JSONObject.wrap(o));
}
for (Object o : collection) {
this.myArrayList.add(JSONObject.wrap(o));
}
}
}
@ -241,34 +241,39 @@ public class JSONArray implements Iterable<Object> {
public double getDouble(int index) throws JSONException {
Object object = this.get(index);
try {
return object instanceof Number ? ((Number) object).doubleValue()
: Double.parseDouble((String) object);
if (object instanceof Number) {
return ((Number) object).doubleValue();
} else if (object instanceof String) {
return Double.parseDouble((String) object);
}
} catch (Exception e) {
throw new JSONException("JSONArray[" + index + "] is not a number.");
}
throw new JSONException("JSONArray[" + index + "] is not a number.");
}
/**
* Get the enum value associated with an index.
*
* @param clazz
* The type of enum to retrieve.
* @param index
* The index must be between 0 and length() - 1.
* @return The enum value at the index location
* @throws JSONException
* if the key is not found or if the value cannot be converted
* to an enum.
*/
public <E extends Enum<E>> E getEnum(Class<E> clazz, int index) throws JSONException {
* Get the enum value associated with an index.
*
* @param clazz
* The type of enum to retrieve.
* @param index
* The index must be between 0 and length() - 1.
* @return The enum value at the index location
* @throws JSONException
* if the key is not found or if the value cannot be converted
* to an enum.
*/
public <E extends Enum<E>> E getEnum(Class<E> clazz, int index)
throws JSONException {
E val = optEnum(clazz, index);
if(val==null) {
if (val == null) {
// JSONException should really take a throwable argument.
// If it did, I would re-implement this with the Enum.valueOf
// method and place any thrown exception in the JSONException
throw new JSONException("JSONObject[" + JSONObject.quote(Integer.toString(index))
+ "] is not an enum of type " + JSONObject.quote(clazz.getSimpleName())
+ ".");
throw new JSONException("JSONObject["
+ JSONObject.quote(Integer.toString(index))
+ "] is not an enum of type "
+ JSONObject.quote(clazz.getSimpleName()) + ".");
}
return val;
}
@ -283,13 +288,13 @@ public class JSONArray implements Iterable<Object> {
* If the key is not found or if the value cannot be converted
* to a BigDecimal.
*/
public BigDecimal getBigDecimal (int index) throws JSONException {
public BigDecimal getBigDecimal(int index) throws JSONException {
Object object = this.get(index);
try {
return new BigDecimal(object.toString());
} catch (Exception e) {
throw new JSONException("JSONArray[" + index +
"] could not convert to BigDecimal.");
throw new JSONException("JSONArray[" + index
+ "] could not convert to BigDecimal.");
}
}
@ -303,13 +308,13 @@ public class JSONArray implements Iterable<Object> {
* If the key is not found or if the value cannot be converted
* to a BigInteger.
*/
public BigInteger getBigInteger (int index) throws JSONException {
public BigInteger getBigInteger(int index) throws JSONException {
Object object = this.get(index);
try {
return new BigInteger(object.toString());
} catch (Exception e) {
throw new JSONException("JSONArray[" + index +
"] could not convert to BigInteger.");
throw new JSONException("JSONArray[" + index
+ "] could not convert to BigInteger.");
}
}
@ -325,11 +330,14 @@ public class JSONArray implements Iterable<Object> {
public int getInt(int index) throws JSONException {
Object object = this.get(index);
try {
return object instanceof Number ? ((Number) object).intValue()
: Integer.parseInt((String) object);
if (object instanceof Number) {
return ((Number) object).intValue();
} else if (object instanceof String) {
return Integer.parseInt((String) object);
}
} catch (Exception e) {
throw new JSONException("JSONArray[" + index + "] is not a number.");
}
throw new JSONException("JSONArray[" + index + "] is not a number.");
}
/**
@ -381,11 +389,14 @@ public class JSONArray implements Iterable<Object> {
public long getLong(int index) throws JSONException {
Object object = this.get(index);
try {
return object instanceof Number ? ((Number) object).longValue()
: Long.parseLong((String) object);
if (object instanceof Number) {
return ((Number) object).longValue();
} else if (object instanceof String) {
return Long.parseLong((String) object);
}
} catch (Exception e) {
throw new JSONException("JSONArray[" + index + "] is not a number.");
}
throw new JSONException("JSONArray[" + index + "] is not a number.");
}
/**
@ -486,11 +497,20 @@ public class JSONArray implements Iterable<Object> {
* @return The truth.
*/
public boolean optBoolean(int index, boolean defaultValue) {
try {
return this.getBoolean(index);
} catch (Exception e) {
Object object = this.opt(index);
if (JSONObject.NULL.equals(object)) {
return defaultValue;
}
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;
}
return defaultValue;
}
/**
@ -518,11 +538,19 @@ public class JSONArray implements Iterable<Object> {
* @return The value.
*/
public double optDouble(int index, double defaultValue) {
try {
return this.getDouble(index);
} catch (Exception e) {
Object object = this.opt(index);
if (JSONObject.NULL.equals(object)) {
return defaultValue;
}
try {
if (object instanceof Number) {
return ((Number) object).doubleValue();
} else if (object instanceof String) {
return Double.parseDouble((String) object);
}
} catch (Exception e) {
}
return defaultValue;
}
/**
@ -550,16 +578,24 @@ public class JSONArray implements Iterable<Object> {
* @return The value.
*/
public int optInt(int index, int defaultValue) {
try {
return this.getInt(index);
} catch (Exception e) {
Object object = this.opt(index);
if (JSONObject.NULL.equals(object)) {
return defaultValue;
}
try {
if (object instanceof Number) {
return ((Number) object).intValue();
} else if (object instanceof String) {
return Integer.parseInt((String) object);
}
} catch (Exception e) {
}
return defaultValue;
}
/**
* Get the enum value associated with a key.
*
*
* @param clazz
* The type of enum to retrieve.
* @param index
@ -572,17 +608,18 @@ public class JSONArray implements Iterable<Object> {
/**
* Get the enum value associated with a key.
*
*
* @param clazz
* The type of enum to retrieve.
* @param index
* The index must be between 0 and length() - 1.
* @param defaultValue
* The default in case the value is not found
* @return The enum value at the index location or defaultValue if
* the value is not found or cannot be assigned to clazz
* @return The enum value at the index location or defaultValue if the value
* is not found or cannot be assigned to clazz
*/
public <E extends Enum<E>> E optEnum(Class<E> clazz, int index, E defaultValue) {
public <E extends Enum<E>> E optEnum(Class<E> clazz, int index,
E defaultValue) {
try {
Object val = this.opt(index);
if (JSONObject.NULL.equals(val)) {
@ -602,10 +639,9 @@ public class JSONArray implements Iterable<Object> {
}
}
/**
* Get the optional BigInteger value associated with an index. The
* defaultValue is returned if there is no value for the index, or if the
* 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
@ -615,16 +651,20 @@ public class JSONArray implements Iterable<Object> {
* @return The value.
*/
public BigInteger optBigInteger(int index, BigInteger defaultValue) {
Object object = this.opt(index);
if (JSONObject.NULL.equals(object)) {
return defaultValue;
}
try {
return this.getBigInteger(index);
return new BigInteger(object.toString());
} 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
* 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
@ -634,8 +674,12 @@ public class JSONArray implements Iterable<Object> {
* @return The value.
*/
public BigDecimal optBigDecimal(int index, BigDecimal defaultValue) {
Object object = this.opt(index);
if (JSONObject.NULL.equals(object)) {
return defaultValue;
}
try {
return this.getBigDecimal(index);
return new BigDecimal(object.toString());
} catch (Exception e) {
return defaultValue;
}
@ -693,11 +737,19 @@ public class JSONArray implements Iterable<Object> {
* @return The value.
*/
public long optLong(int index, long defaultValue) {
try {
return this.getLong(index);
} catch (Exception e) {
Object object = this.opt(index);
if (JSONObject.NULL.equals(object)) {
return defaultValue;
}
try {
if (object instanceof Number) {
return ((Number) object).longValue();
} else if (object instanceof String) {
return Long.parseLong((String) object);
}
} catch (Exception e) {
}
return defaultValue;
}
/**
@ -959,37 +1011,44 @@ public class JSONArray implements Iterable<Object> {
}
return this;
}
/**
* Creates a JSONPointer using an intialization string and tries to
* match it to an item within this JSONArray. For example, given a
* JSONArray initialized with this document:
* 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:
*
* <pre>
* [
* {"b":"c"}
* ]
* </pre>
* and this JSONPointer string:
* <pre>
* "/0/b"
* </pre>
* 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
* and this JSONPointer string:
*
* <pre>
* &quot;/0/b&quot;
* </pre>
*
* 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 new JSONPointer(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
* 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
* @throws IllegalArgumentException
* if {@code jsonPointer} has invalid syntax
*/
public Object optQuery(String jsonPointer) {
JSONPointer pointer = new JSONPointer(jsonPointer);
@ -1009,16 +1068,16 @@ public class JSONArray implements Iterable<Object> {
* was no value.
*/
public Object remove(int index) {
return index >= 0 && index < this.length()
? this.myArrayList.remove(index)
: null;
return index >= 0 && index < this.length() ? this.myArrayList
.remove(index) : null;
}
/**
* Determine if two JSONArrays are similar.
* They must contain similar sequences.
* Determine if two JSONArrays are similar. They must contain similar
* sequences.
*
* @param other The other JSONArray
* @param other
* The other JSONArray
* @return true if they are equal
*/
public boolean similar(Object other) {
@ -1026,18 +1085,18 @@ public class JSONArray implements Iterable<Object> {
return false;
}
int len = this.length();
if (len != ((JSONArray)other).length()) {
if (len != ((JSONArray) other).length()) {
return false;
}
for (int i = 0; i < len; i += 1) {
Object valueThis = this.get(i);
Object valueOther = ((JSONArray)other).get(i);
Object valueOther = ((JSONArray) other).get(i);
if (valueThis instanceof JSONObject) {
if (!((JSONObject)valueThis).similar(valueOther)) {
if (!((JSONObject) valueThis).similar(valueOther)) {
return false;
}
} else if (valueThis instanceof JSONArray) {
if (!((JSONArray)valueThis).similar(valueOther)) {
if (!((JSONArray) valueThis).similar(valueOther)) {
return false;
}
} else if (!valueThis.equals(valueOther)) {
@ -1081,6 +1140,7 @@ public class JSONArray implements Iterable<Object> {
* @return a printable, displayable, transmittable representation of the
* array.
*/
@Override
public String toString() {
try {
return this.toString(0);
@ -1090,7 +1150,7 @@ public class JSONArray implements Iterable<Object> {
}
/**
* Make a prettyprinted JSON text of this JSONArray. Warning: This method
* Make a pretty printed JSON text of this JSONArray. Warning: This method
* assumes that the data structure is acyclical.
*
* @param indentFactor
@ -1174,9 +1234,9 @@ public class JSONArray implements Iterable<Object> {
}
/**
* 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.
* 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.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*