FudgeFieldContainerBrowser.java

/**
 * Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
 * 
 * Please see distribution for license.
 */
package com.opengamma.transport.jaxrs;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;

import org.fudgemsg.FudgeField;
import org.fudgemsg.FudgeMsg;
import org.fudgemsg.FudgeMsgEnvelope;

/**
 * Allow introspection of a large FudgeFieldContainer. This is useful for constructing
 * direct URLs to deep data without the client having to process the full message. 
 */
public class FudgeFieldContainerBrowser {

  private final FudgeMsg _message;

  public FudgeFieldContainerBrowser(final FudgeMsg message) {
    _message = message;
  }

  @GET
  public FudgeMsgEnvelope get() {
    return new FudgeMsgEnvelope(_message);
  }

  @Path("{fieldName}")
  public FudgeFieldContainerBrowser get(@PathParam("fieldName") final String fudgeField) {
    final FudgeField field = _message.getByName(fudgeField);
    if (field == null) {
      return null;
    }
    if (!(field.getValue() instanceof FudgeMsg)) {
      return null;
    }
    return new FudgeFieldContainerBrowser((FudgeMsg) field.getValue());
  }

}