erik/JSON-java
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Performance improvments by Valentin Valchev

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This commit is contained in:
Douglas Crockford 2012-04-22 16:52:45 -07:00
parent 319e3b9d84
commit 9115ada84d
2 changed files with 224 additions and 275 deletions
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138
JSONArray.java
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@ -25,6 +25,7 @@ SOFTWARE.
*/
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Array;
import java.util.ArrayList;
@ -60,23 +61,23 @@ import java.util.Map;
* accept:
* <ul>
* <li>An extra <code>,</code>&nbsp;<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>&nbsp;<small>(comma)</small> elision.</li>
* before the closing bracket.</li>
* <li>The <code>null</code> value will be inserted when there is <code>,</code>
* &nbsp;<small>(comma)</small> elision.</li>
* <li>Strings may be quoted with <code>'</code>&nbsp;<small>(single
* quote)</small>.</li>
* 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>
* 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>
* well as by <code>,</code> <small>(comma)</small>.</li>
* </ul>
*
* @author JSON.org
* @version 2011-12-19
* @version 2012-04-20
*/
public class JSONArray {
@ -555,8 +556,8 @@ public class JSONArray {
public String optString(int index, String defaultValue) {
Object object = this.opt(index);
return JSONObject.NULL.equals(object)
? defaultValue
: object.toString();
? defaultValue : object
.toString();
}
@ -834,56 +835,15 @@ public class JSONArray {
* @throws JSONException
*/
public String toString(int indentFactor) throws JSONException {
return this.toString(indentFactor, 0);
StringWriter sw = new StringWriter();
synchronized (sw.getBuffer()) {
return this.write(sw, indentFactor, 0).toString();
}
}
/**
* Make a prettyprinted JSON text of this JSONArray.
* Warning: This method assumes that the data structure is acyclical.
* @param indentFactor The number of spaces to add to each level of
* indentation.
* @param indent The indention of the top level.
* @return a printable, displayable, transmittable
* representation of the array.
* @throws JSONException
*/
String toString(int indentFactor, int indent) throws JSONException {
int len = this.length();
if (len == 0) {
return "[]";
}
int i;
StringBuffer sb = new StringBuffer("[");
if (len == 1) {
sb.append(JSONObject.valueToString(this.myArrayList.get(0),
indentFactor, indent));
} else {
int newindent = indent + indentFactor;
sb.append('\n');
for (i = 0; i < len; i += 1) {
if (i > 0) {
sb.append(",\n");
}
for (int j = 0; j < newindent; j += 1) {
sb.append(' ');
}
sb.append(JSONObject.valueToString(this.myArrayList.get(i),
indentFactor, newindent));
}
sb.append('\n');
for (i = 0; i < indent; i += 1) {
sb.append(' ');
}
}
sb.append(']');
return sb.toString();
}
/**
* Write the contents of the JSONArray as JSON text to a writer.
* For compactness, no whitespace is added.
* Write the contents of the JSONArray as JSON text to a writer. For
* compactness, no whitespace is added.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
@ -891,25 +851,51 @@ public class JSONArray {
* @throws JSONException
*/
public Writer write(Writer writer) throws JSONException {
try {
boolean b = false;
int len = this.length();
return this.write(writer, 0, 0);
}
/**
* Write the contents of the JSONArray as JSON text to a writer. For
* compactness, no whitespace is added.
* <p>
* Warning: This method assumes that the data structure is acyclical.
*
* @param indentFactor
* The number of spaces to add to each level of indentation.
* @param indent
* The indention of the top level.
* @return The writer.
* @throws JSONException
*/
Writer write(Writer writer, int indentFactor, int indent)
throws JSONException {
try {
boolean commanate = false;
int length = this.length();
writer.write('[');
for (int i = 0; i < len; i += 1) {
if (b) {
writer.write(',');
if (length == 1) {
JSONObject.writeValue(writer, this.myArrayList.get(0),
indentFactor, indent);
} 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);
JSONObject.writeValue(writer, this.myArrayList.get(i),
indentFactor, newindent);
commanate = true;
}
Object v = this.myArrayList.get(i);
if (v instanceof JSONObject) {
((JSONObject)v).write(writer);
} else if (v instanceof JSONArray) {
((JSONArray)v).write(writer);
} else {
writer.write(JSONObject.valueToString(v));
if (indentFactor > 0) {
writer.write('\n');
}
b = true;
JSONObject.indent(writer, indent);
}
writer.write(']');
return writer;
@ -917,4 +903,4 @@ public class JSONArray {
throw new JSONException(e);
}
}
}
}