/*
* Copyright 2010.
*/
package ro.isdc.wro.extensions.processor.support.cjson;
import java.io.InputStream;
import org.mozilla.javascript.ScriptableObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ro.isdc.wro.WroRuntimeException;
import ro.isdc.wro.extensions.script.RhinoScriptBuilder;
import ro.isdc.wro.util.StopWatch;
import ro.isdc.wro.util.WroUtil;
/**
* The underlying implementation use the cjson project: {@link http://stevehanov.ca/blog/index.php?id=104}.
*
* @author Alex Objelean
* @since 1.3.8
*/
public class CJson {
private static final Logger LOG = LoggerFactory.getLogger(CJson.class);
private ScriptableObject scope;
/**
* Initialize script builder for evaluation.
*/
private RhinoScriptBuilder initScriptBuilder() {
try {
RhinoScriptBuilder builder = null;
if (scope == null) {
builder = RhinoScriptBuilder.newClientSideAwareChain().addJSON().evaluateChain(
getScriptAsStream(), "cjson.js");
scope = builder.getScope();
} else {
builder = RhinoScriptBuilder.newChain(scope);
}
return builder;
} catch (final Exception e) {
LOG.error("Processing error:" + e.getMessage(), e);
throw new WroRuntimeException("Processing error", e);
}
}
/**
* @return stream of the less.js script.
*/
protected InputStream getScriptAsStream() {
return CJson.class.getResourceAsStream("cjson.min.js");
}
/**
* @param data css content to process.
* @return processed css content.
*/
public String pack(final String data) {
final StopWatch stopWatch = new StopWatch();
stopWatch.start("initContext");
final RhinoScriptBuilder builder = initScriptBuilder();
stopWatch.stop();
stopWatch.start("cjson.pack");
try {
final String execute = "CJSON.stringify(JSON.parse(" + WroUtil.toJSMultiLineString(data) + "));";
final Object result = builder.evaluate(execute, "pack");
return String.valueOf(result);
} finally {
stopWatch.stop();
LOG.debug(stopWatch.prettyPrint());
}
}
public String unpack(final String data) {
final StopWatch stopWatch = new StopWatch();
stopWatch.start("initContext");
final RhinoScriptBuilder builder = initScriptBuilder();
stopWatch.stop();
stopWatch.start("json.unpack");
try {
final String execute = "JSON.stringify(CJSON.parse(" + WroUtil.toJSMultiLineString(data) + "));";
final Object result = builder.evaluate(execute, "unpack");
return String.valueOf(result);
} finally {
stopWatch.stop();
LOG.debug(stopWatch.prettyPrint());
}
}
}