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JsonWriter.java
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JsonWriter.java
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/* ***************************************************************** */
/* Licensed Materials - Property of IBM */
/* */
/* Copyright IBM Corp. 1985, 2013 All Rights Reserved */
/* */
/* US Government Users Restricted Rights - Use, duplication or */
/* disclosure restricted by GSA ADP Schedule Contract with */
/* IBM Corp. */
/* */
/* ***************************************************************** */
package com.ibm.domino.services.util;
import java.io.IOException;
import java.io.Writer;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
import java.util.Vector;
import lotus.domino.DateTime;
import lotus.domino.NotesException;
import com.ibm.commons.util.AbstractIOException;
import com.ibm.commons.util.io.json.JsonException;
import com.ibm.commons.util.io.json.JsonGenerator;
import com.ibm.commons.util.io.json.JsonJavaFactory;
import com.ibm.domino.services.rest.RestServiceConstants;
/**
* Specialized JSON writer.
*
* @author Philippe Riand
*/
public class JsonWriter extends JsonGenerator.WriterGenerator {
private int objectLevels = 0;
private boolean first[] = new boolean[32]; // max 32 for now...
public JsonWriter(Writer writer, boolean compact) {
super(JsonJavaFactory.instance,writer,compact);
}
public void startObject() throws IOException {
nl();
indent();
out('{');
first[++objectLevels]=true;
incIndent();
}
public void endObject() throws IOException {
nl();
decIndent();
indent();
out('}');
first[--objectLevels]=false;
}
public void startArray() throws IOException {
nl();
indent();
out('[');
first[++objectLevels]=true;
incIndent();
}
public void endArray() throws IOException {
nl();
decIndent();
indent();
out(']');
first[--objectLevels]=false;
}
public void startArrayItem() throws IOException {
if(!first[objectLevels]) {
out(',');
}
}
public void endArrayItem() throws IOException {
first[objectLevels]=false;
}
public void startProperty(String propertyName) throws IOException {
if(!first[objectLevels]) {
out(',');
} else {
first[objectLevels]=false;
}
nl();
incIndent();
indent();
outPropertyName(propertyName);
out(':');
}
public void endProperty() throws IOException {
decIndent();
}
// Should be moved to the core libs
@Override
public void outNumberLiteral(double d) throws IOException {
long l = (long)d;
if((double)l==d) {
String s = Long.toString(l);
out(s);
} else {
String s = Double.toString(d);
out(s);
}
}
// Should be moved to the core libs
public void outDateLiteral(Date value) throws IOException {
String s = dateToString(value, true);
outStringLiteral(s);
}
public void outDateLiteral(DateTime value) throws IOException {
String s = dateToString(value, true);
out(s);
}
public void outDominoValue(Object value) throws IOException {
try {
if(value==null) {
outNull();
return;
}
if(value instanceof String) {
outStringLiteral((String)value);
return;
}
if(value instanceof Number) {
outNumberLiteral(((Number)value).doubleValue());
return;
}
if(value instanceof Boolean) {
outBooleanLiteral(((Boolean)value).booleanValue());
return;
}
if(value instanceof Date) {
outStringLiteral(dateToString((Date)value, true));
return;
}
if(value instanceof DateTime) {
try {
// Time Only
if (((DateTime) value).getDateOnly().length() == 0) {
outStringLiteral(timeOnlyToString(((DateTime)value).toJavaDate()));
return;
}
// Date Only
else if (((DateTime) value).getTimeOnly().length() == 0) {
outStringLiteral(dateOnlyToString(((DateTime)value).toJavaDate()));
return;
}
else {
outStringLiteral(dateToString(((DateTime)value).toJavaDate(), true));
return;
}
} catch(NotesException ex) {
throw new AbstractIOException(ex,"");
}
}
if(value instanceof Vector) {
startArray();
Vector v = (Vector)value;
int count = v.size();
for(int i=0; i<count; i++) {
startArrayItem();
outDominoValue(v.get(i));
endArrayItem();
}
endArray();
return;
}
// Should not happen...
outStringLiteral("???");
} catch(JsonException ex) {
throw new AbstractIOException(ex,"");
}
}
private static SimpleDateFormat ISO8601_UTC = null;
private static SimpleDateFormat ISO8601_DT = new SimpleDateFormat(RestServiceConstants.TIME_FORMAT_C); // $NON-NLS-1$
private static SimpleDateFormat ISO8601_DO = new SimpleDateFormat(RestServiceConstants.TIME_FORMAT_DO);
private static SimpleDateFormat ISO8601_TO = new SimpleDateFormat(RestServiceConstants.TIME_FORMAT_TO);
/**
* Converts a date to an ISO8601 string.
*
* @param value The date.
* @param utc If <code>true</code>, format the time in UTC. If <code>false</code>,
* format the time in the local time zone.
* @return The ISO8601 string.
* @throws IOException
*/
private String dateToString(Date value, boolean utc) throws IOException {
String result = null;
if ( utc ) {
if ( ISO8601_UTC == null ) {
// Initialize the UTC formatter once
TimeZone tz = TimeZone.getTimeZone(RestServiceConstants.TIME_ZONE_UTC);
ISO8601_UTC = new SimpleDateFormat(RestServiceConstants.TIME_FORMAT_D);
ISO8601_UTC.setTimeZone(tz);
}
result = ISO8601_UTC.format((Date)value);
}
else {
result = ISO8601_DT.format((Date)value);
}
return result;
}
private String dateOnlyToString(Date javaDate) {
return ISO8601_DO.format(javaDate);
}
private String timeOnlyToString(Date javaDate) {
return ISO8601_TO.format(javaDate);
}
private String dateToString(DateTime value, boolean utc) throws IOException {
try {
return dateToString(value.toJavaDate(), utc);
} catch(NotesException ex) {
throw new AbstractIOException(ex,"");
}
}
public Date toJavaDate(DateTime value) throws IOException {
try {
return value.toJavaDate();
} catch(NotesException ex) {
throw new AbstractIOException(ex,"");
}
}
}