private InsertAttributeModel model = new InsertAttributeModel(
            new DefaultAttributeResolver());

    /**
     * Name to insert.
     */
    private String name;

    /**
     * The value of the attribute.
     */
    private Object value = null;

    /**
     * This value is evaluated only if <code>value</code> is null and the
     * attribute with the associated <code>name</code> is null.
     *
     * @since 2.1.2
     */
    private Object defaultValue;

    /**
     * The type of the {@link #defaultValue}, if it is a string.
     *
     * @since 2.1.2
     */
    private String defaultValueType;

    /**
     * The role to check for the default value. If the user is in the specified
     * role, the default value is taken into account; otherwise, it is ignored
     * (skipped).
     *
     * @since 2.1.2
     */
    private String defaultValueRole;

    /**
     * The role to check. If the user is in the specified role, the tag is taken
     * into account; otherwise, the tag is ignored (skipped).
     *
     * @since 2.1.1
     */
    private String role;

    /**
     * The view preparer to use before the rendering.
     *
     * @since 2.1.1
     */
    private String preparer;

    /**
     * This flag, if <code>true</code>, flushes the content after rendering.
     *
     * @since 2.1.1
     */
    private boolean flush;

    /**
     * This flag, if <code>true</code>, ignores exception thrown by preparers
     * and those caused by problems with definitions.
     *
     * @since 2.1.1
     */
    private boolean ignore;

    /**
     * Sets the name of the attribute.
     *
     * @param value The name of the attribute.
     */
    public void setName(String value) {
        this.name = value;
    }

    /**
     * Returns  the name of the attribute.
     *
     * @return The name of the attribute.
     */
    public String getName() {
        return name;
    }

    /**
     * Get the value.
     *
     * @return The value.
     */
    public Object getValue() {
        return value;
    }

    /**
     * Set the value.
     *
     * @param value The new value
     */
    public void setValue(Object value) {
        this.value = value;
    }

    /**
     * Returns the default value, that is evaluated only if <code>value</code>
     * is null and the attribute with the associated <code>name</code> is null.
     *
     * @return The default value.
     */
    public Object getDefaultValue() {
        return defaultValue;
    }

    /**
     * Sets the default value, that is evaluated only if <code>value</code> is
     * null and the attribute with the associated <code>name</code> is null.
     *
     * @param defaultValue The default value to set.
     */
    public void setDefaultValue(Object defaultValue) {
        this.defaultValue = defaultValue;
    }

    /**
     * Returns the default value type. It will be used only if
     * {@link #getDefaultValue()} is a string.
     *
     * @return The default value type.
     */
    public String getDefaultValueType() {
        return defaultValueType;
    }

    /**
     * Sets the default value type. To be used in conjunction with
     * {@link #setDefaultValue(Object)} when passing a string.
     *
     * @param defaultValueType The default value type.
     */
    public void setDefaultValueType(String defaultValueType) {
        this.defaultValueType = defaultValueType;
    }

    /**
     * Returns the role to check for the default value. If the user is in the specified
     * role, the default value is taken into account; otherwise, it is ignored
     * (skipped).
     *
     * @return The default value role.
     */
    public String getDefaultValueRole() {
        return defaultValueRole;
    }

    /**
     * Sets the role to check for the default value. If the user is in the specified
     * role, the default value is taken into account; otherwise, it is ignored
     * (skipped).
     *
     * @param defaultValueRole The default value role.
     */
    public void setDefaultValueRole(String defaultValueRole) {
        this.defaultValueRole = defaultValueRole;
    }

    /**
     * Returns the role to check. If the user is in the specified role, the tag is
     * taken into account; otherwise, the tag is ignored (skipped).
     *
     * @return The role to check.
     * @since 2.1.1
     */
    public String getRole() {
        return role;
    }

    /**
     * Sets the role to check. If the user is in the specified role, the tag is
     * taken into account; otherwise, the tag is ignored (skipped).
     *
     * @param role The role to check.
     * @since 2.1.1
     */
    public void setRole(String role) {
        this.role = role;
    }

    /**
     * Returns the preparer name.
     *
     * @return The preparer name.
     * @since 2.1.1
     */
    public String getPreparer() {
        return preparer;
    }

    /**
     * Sets the preparer name.
     *
     * @param preparer The preparer name.
     * @since 2.1.1
     */
    public void setPreparer(String preparer) {
        this.preparer = preparer;
    }

    /**
     * Returns the flush flag. If <code>true</code>, current page out stream
     * is flushed after insertion.
     *
     * @return The flush flag.
     * @since 2.1.1
     */
    public boolean isFlush() {
        return flush;
    }

    /**
     * Sets the flush flag. If <code>true</code>, current page out stream
     * is flushed after insertion.
     *
     * @param flush The flush flag.
     * @since 2.1.1
     */
    public void setFlush(boolean flush) {
        this.flush = flush;
    }

    /**
     * Returns the ignore flag. If it is set to true, and the attribute
     * specified by the name does not exist, simply return without writing
     * anything. The default value is false, which will cause a runtime
     * exception to be thrown.
     *
     * @return The ignore flag.
     * @since 2.1.1
     */
    public boolean isIgnore() {
        return ignore;
    }

    /**
     * Sets the ignore flag. If this attribute is set to true, and the attribute
     * specified by the name does not exist, simply return without writing
     * anything. The default value is false, which will cause a runtime
     * exception to be thrown.
     *
     * @param ignore The ignore flag.
     * @since 2.1.1
     */
    public void setIgnore(boolean ignore) {
        this.ignore = ignore;
    }

    /** {@inheritDoc} */
    @Override
    public void doTag() throws JspException, IOException {
        JspContext jspContext = getJspContext();
        model.start(JspUtil.getComposeStack(jspContext), JspUtil
                .getCurrentContainer(jspContext), ignore, preparer, role,
                defaultValue, defaultValueRole, defaultValueType, name,
                (Attribute) value, jspContext);

    public String getRole() {
        return role;
    }

    /**
     * Sets the role to check. If the user is in the specified role, the tag is
     * taken into account; otherwise, the tag is ignored (skipped).
     *
     * @param role The role to check.
     * @since 2.1.1
     */
    public void setRole(String role) {
        this.role = role;
    }

    /**
     * Returns the preparer name.
     *
     * @return The preparer name.
     * @since 2.1.1
     */
    public String getPreparer() {
        return preparer;
    }

    /**
     * Sets the preparer name.
     *
     * @param preparer The preparer name.
     * @since 2.1.1
     */
    public void setPreparer(String preparer) {
        this.preparer = preparer;
    }

    /**
     * Returns the flush flag. If <code>true</code>, current page out stream
     * is flushed after insertion.
     *
     * @return The flush flag.
     * @since 2.1.1
     */
    public boolean isFlush() {
        return flush;
    }

    /**
     * Sets the flush flag. If <code>true</code>, current page out stream
     * is flushed after insertion.
     *
     * @param flush The flush flag.
     * @since 2.1.1
     */
    public void setFlush(boolean flush) {
        this.flush = flush;
    }

    /**
     * Returns the ignore flag. If it is set to true, and the attribute
     * specified by the name does not exist, simply return without writing
     * anything. The default value is false, which will cause a runtime
     * exception to be thrown.
     *
     * @return The ignore flag.
     * @since 2.1.1
     */
    public boolean isIgnore() {
        return ignore;
    }

    /**
     * Sets the ignore flag. If this attribute is set to true, and the attribute
     * specified by the name does not exist, simply return without writing
     * anything. The default value is false, which will cause a runtime
     * exception to be thrown.
     *
     * @param ignore The ignore flag.
     * @since 2.1.1
     */
    public void setIgnore(boolean ignore) {
        this.ignore = ignore;
    }

    /**
     * Returns a string representing the URI of a template (for example, a JSP
     * page).
     *
     * @return The template URI.
     * @since 2.1.0
     */
    public String getTemplate() {
        return template;
    }

    /**
     * Sets a string representing the URI of a template (for example, a JSP
     * page).
     *
     * @param template The template URI.
     * @since 2.1.0
     */
    public void setTemplate(String template) {
        this.template = template;
    }

    /**
     * Returns the type of the template attribute.
     *
     * @return The template type.
     * @since 2.2.0
     */
    public String getTemplateType() {
        return templateType;
    }

    /**
     * Sets the type of the template attribute.
     *
     * @param templateType The template type.
     * @since 2.2.0
     */
    public void setTemplateType(String templateType) {
        this.templateType = templateType;
    }

    /**
     * Returns the expression to evaluate to get the value of the template.
     *
     * @return The template expression.
     * @since 2.2.0
     */
    public String getTemplateExpression() {
        return templateExpression;
    }

    /**
     * Sets the expression to evaluate to get the value of the template.
     *
     * @param templateExpression The template expression.
     * @since 2.2.0
     */
    public void setTemplateExpression(String templateExpression) {
        this.templateExpression = templateExpression;
    }

    /** {@inheritDoc} */
    @Override
    public void doTag() throws JspException, IOException {
        JspContext jspContext = getJspContext();
        model.start(JspUtil.getCurrentContainer(jspContext), jspContext);
        JspUtil.evaluateFragment(getJspBody());
        model.end(JspUtil.getCurrentContainer(jspContext), template,