List<Artifact> trial = getTrail();

        List<String> ret = new ArrayList<>(trial.size());

        for (Artifact artifact : trial) {
            ret.add(artifact.getId());
        }

        return ret;
    }

    private List<Artifact> getTrail() throws OverConstrainedVersionException {
        if (trail == null) {
            List<Artifact> ids = new LinkedList<>();

    }

    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder(128);
        if (mojoDescriptor != null) {
            buffer.append(mojoDescriptor.getId());
        }
        buffer.append(" {execution: ").append(executionId).append('}');
        return buffer.toString();
    }

    public String getGroupId() {
        if (mojoDescriptor != null) {

            }
        };
    }

    @Override
    public PluginExecution getModel() {
        return delegate.getPlugin().getExecutions().stream()
                .filter(pe -> Objects.equals(pe.getId(), getExecutionId()))
                .findFirst()
                .map(org.apache.maven.model.PluginExecution::getDelegate)
                .orElse(null);
    }

    @Override

            if (StringUtil.isBlank(userCode)) {
                userCode = getUserCodeFromUserBean(request);
                if (StringUtil.isBlank(userCode)) {
                    userCode = getId();
                }
            }

            if (StringUtil.isNotBlank(userCode)) {
                updateUserSessionId(userCode);
            }
            return userCode;
        }).orElse(null);

        // always return true
        return Constants.TRUE;
    }

    @Override
    public String getConfigId() {
        return ConfigType.DATA.getConfigId(getId());
    }

    public Map<String, String> getHandlerParameterMap() {
        if (handlerParameterMap == null) {
            handlerParameterMap = ParameterUtil.parse(getHandlerParameter());
        }

        if (executionId != null && !executionId.isEmpty()) {
            for (PluginExecution execution : executions) {
                if (executionId.equals(execution.getId())) {
                    return execution;
                }
            }
        }

        return null;
    }

            });
            if (logger.isDebugEnabled()) {
                cachedPathMappingList.forEach(e -> {
                    logger.debug("path mapping: {}: {} -> {}", e.getId(), e.getRegex(), e.getReplacement());
                });
            }
            return cachedPathMappingList.size();
        } catch (final ComponentNotFoundException e) {
            if (logger.isDebugEnabled()) {

                        + "\"}}\n" + hit.getSourceAsString() + "\n";
                try {
                    zos.write(data.getBytes(Constants.CHARSET_UTF_8));
                } catch (final IOException e) {
                    logger.warn("Failed to access /{}/{}.", index, hit.getId(), e);
                }
                return true;
            });

    protected float weight = 1.0f;

    /**
     * Constructs a new UrlQueueImpl instance.
     */
    public UrlQueueImpl() {
        // NOP
    }

    @Override
    public IDTYPE getId() {
        return id;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.entity.UrlQueue#setId(IDTYPE)
     */
    @Override
    public void setId(final IDTYPE id) {

                            try {
                                writer.write("{\"index\":{\"_index\":\"" + index + "\",\"_id\":\""
                                        + StringEscapeUtils.escapeJson(hit.getId()) + "\"}}\n");
                                writer.write(hit.getSourceAsString());
                                writer.write("\n");
                            } catch (final IOException e) {