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Free open-source Java API for Redmine and Chiliproject bug/task management systems.
The newest version!
package org.redmine.ta.internal.json;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import org.json.JSONException;
import org.json.JSONWriter;
public class JsonOutput {
/**
* Adds a value to a writer if value is not null
.
*
* @param writer
* writer to add object to.
* @param field
* field name to set.
* @param value
* field value.
* @throws JSONException
* if io error occurs.
*/
public static void addIfNotNull(JSONWriter writer, String field,
String value) throws JSONException {
if (value == null)
return;
writer.key(field);
writer.value(value);
}
/**
* Adds a value to a writer if value is not null
.
*
* @param writer
* writer to add object to.
* @param field
* field name to set.
* @param value
* field value.
* @throws JSONException
* if io error occurs.
*/
public static void addIfNotNull(JSONWriter writer, String field,
Integer value) throws JSONException {
if (value == null)
return;
writer.key(field);
writer.value(value);
}
/**
* Adds a value to a writer if value is not null
.
*
* @param writer
* writer to add object to.
* @param field
* field name to set.
* @param value
* field value.
* @throws JSONException
* if io error occurs.
*/
public static void addIfNotNull(JSONWriter writer, String field, Float value)
throws JSONException {
if (value == null)
return;
writer.key(field);
writer.value(value);
}
/**
* Adds a value to a writer if value is not null
.
*
* @param writer
* writer to add object to.
* @param field
* field name to set.
* @param value
* field value.
* @param format
* date foramt to use.
* @throws JSONException
* if io error occurs.
*/
public static void addIfNotNull(JSONWriter writer, String field,
Date value, final SimpleDateFormat format) throws JSONException {
if (value == null)
return;
writer.key(field);
writer.value(format.format(value));
}
/**
* Adds a value to a writer.
*
* @param writer
* writer to add object to.
* @param field
* field name to set.
* @param value
* field value.
* @param format
* date foramt to use.
* @throws JSONException
* if io error occurs.
*/
public static void add(JSONWriter writer, String field,
Date value,
final SimpleDateFormat format) throws JSONException {
writer.key(field);
if (value == null)
writer.value(null);
else
writer.value(format.format(value));
}
/**
* Adds an object if object is not null.
*
* @param writer
* object writer.
* @param field
* field writer.
* @param value
* value writer.
* @param objWriter
* object value writer.
* @throws JSONException
* if io error occurs.
*/
public static void addIfNotNull(JSONWriter writer, String field,
T value, JsonObjectWriter objWriter) throws JSONException {
if (value == null)
return;
writer.key(field);
writer.object();
objWriter.write(writer, value);
writer.endObject();
}
/**
* Adds a list.
*
* @param writer
* used writer.
* @param field
* field to write.
* @param items
* used items.
* @param objWriter
* single object writer.
*/
public static void addArrayIfNotNull(JSONWriter writer, String field,
Collection items, JsonObjectWriter objWriter)
throws JSONException {
if (items == null)
return;
addCollection(writer, field, items, objWriter);
}
/**
* Adds a list.
*
* @param writer
* used writer.
* @param field
* field to write.
* @param items
* used items.
* @param objWriter
* single object writer.
*/
public static void addArrayIfNotEmpty(JSONWriter writer, String field,
Collection items, JsonObjectWriter objWriter)
throws JSONException {
if (items == null || items.size() == 0)
return;
addCollection(writer, field, items, objWriter);
}
private static void addCollection(JSONWriter writer, String field,
Collection items, JsonObjectWriter objWriter)
throws JSONException {
writer.key(field);
writer.array();
for (T item : items) {
writer.object();
objWriter.write(writer, item);
writer.endObject();
}
writer.endArray();
}
}