Example usage for javax.script ScriptContext setWriter

Introduction

In this page you can find the example usage for javax.script ScriptContext setWriter.

Prototype

public void setWriter(Writer writer);

Source Link

Document

Sets the Writer for scripts to use when displaying output.

Usage

From source file:org.xwiki.rendering.macro.script.AbstractJSR223ScriptMacro.java

/**
 * Execute provided script and return {@link Block} based result.
 * /*from  w  ww  .  j  a  va2s.  c o m*/
 * @param engine the script engine to use to evaluate the script.
 * @param parameters the macro parameters.
 * @param content the script to execute.
 * @param context the context of the macro transformation.
 * @return the result of script execution.
 * @throws ScriptException failed to evaluate script
 * @throws MacroExecutionException failed to evaluate provided content.
 */
protected List<Block> evaluateBlock(ScriptEngine engine, P parameters, String content,
        MacroTransformationContext context) throws ScriptException, MacroExecutionException {
    List<Block> result;

    ScriptContext scriptContext = getScriptContext();

    StringWriter stringWriter = new StringWriter();

    // set writer in script context
    scriptContext.setWriter(stringWriter);

    try {
        Object scriptResult = eval(content, engine, scriptContext);

        if (scriptResult instanceof XDOM) {
            result = ((XDOM) scriptResult).getChildren();
        } else if (scriptResult instanceof Block) {
            result = Collections.singletonList((Block) scriptResult);
        } else if (scriptResult instanceof List && !((List<?>) scriptResult).isEmpty()
                && ((List<?>) scriptResult).get(0) instanceof Block) {
            result = (List<Block>) scriptResult;
        } else {
            // Run the wiki syntax parser on the script-rendered content
            result = parseScriptResult(stringWriter.toString(), parameters, context);
        }
    } finally {
        // remove writer script from context
        scriptContext.setWriter(null);
    }

    return result;
}