Example usage for javax.el ValueExpression getExpressionString

List of usage examples for javax.el ValueExpression getExpressionString

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Introduction

In this page you can find the example usage for javax.el ValueExpression getExpressionString.

Prototype

public abstract String getExpressionString();

Source Link

Usage

From source file:org.apache.myfaces.component.html.ext.AbstractHtmlDataTable.java

/**
 *
 *///from w ww  .  ja  v  a 2s.  c  o m
protected String getSortPropertyFromEL(UIComponent component) {
    if (getVar() == null) {
        log.warn(
                "There is no 'var' specified on the dataTable, sort properties cannot be determined automaticaly.");
        return null;
    }

    for (Iterator<UIComponent> iter = component.getChildren().iterator(); iter.hasNext();) {
        UIComponent aChild = (UIComponent) iter.next();
        if (aChild.isRendered()) {
            ValueExpression vb = aChild.getValueExpression("value");
            if (vb != null) {
                String expressionString = vb.getExpressionString();

                int varIndex = expressionString.indexOf(getVar() + ".");
                if (varIndex != -1) {
                    int varEndIndex = varIndex + getVar().length();
                    String tempProp = expressionString.substring(varEndIndex + 1, expressionString.length());

                    StringTokenizer tokenizer = new StringTokenizer(tempProp, " +[]{}-/*|?:&<>!=()%");
                    if (tokenizer.hasMoreTokens())
                        return tokenizer.nextToken();
                }
            } else {
                String sortProperty = getSortPropertyFromEL(aChild);
                if (sortProperty != null)
                    return sortProperty;
            }
        }
    }

    return null;
}

From source file:org.apache.myfaces.custom.aliasbean.Alias.java

private void computeEvaluatedExpression(FacesContext facesContext) {
    if (evaluatedExpression != null)
        return;//  w  w  w  .  ja va  2 s.  c  o  m

    ValueExpression valueVB = null;
    if (_valueExpression == null) {
        valueVB = _aliasComponent.getValueExpression("value");
        _valueExpression = valueVB.getExpressionString();
    }

    if (valueVB == null) {
        if (_valueExpression.startsWith("#{")) {
            valueVB = facesContext.getApplication().getExpressionFactory()
                    .createValueExpression(facesContext.getELContext(), _valueExpression, Object.class);
            evaluatedExpression = valueVB.getValue(facesContext.getELContext());
        } else {
            evaluatedExpression = _valueExpression;
        }
    } else {
        evaluatedExpression = valueVB.getValue(facesContext.getELContext());
    }
}

From source file:org.apache.myfaces.custom.aliasbean.Alias.java

/**
 * Activate this alias (ie create the temporary name).
 *//*from   w  w w.  j a  v a  2 s.  c om*/
void make(FacesContext facesContext) {
    if (_active)
        return;

    ValueExpression aliasVB;
    if (_aliasBeanExpression == null) {
        aliasVB = _aliasComponent.getValueExpression("alias");
        if (aliasVB == null)
            return;
        _aliasBeanExpression = aliasVB.getExpressionString();
        if (_aliasBeanExpression == null)
            return;
    } else {
        aliasVB = facesContext.getApplication().getExpressionFactory()
                .createValueExpression(facesContext.getELContext(), _aliasBeanExpression, Object.class);
    }

    computeEvaluatedExpression(facesContext);

    aliasVB.setValue(facesContext.getELContext(), evaluatedExpression);
    _active = true;

    log.debug("makeAlias: " + _valueExpression + " = " + _aliasBeanExpression);
}

From source file:org.apache.myfaces.tomahawk.util.ErrorPageWriter.java

private static void writeAttributes(Writer writer, UIComponent c) {
    try {/*w ww  . ja  va2s. com*/
        BeanInfo info = Introspector.getBeanInfo(c.getClass());
        PropertyDescriptor[] pd = info.getPropertyDescriptors();
        Method m = null;
        Object v = null;
        String str = null;
        for (int i = 0; i < pd.length; i++) {
            if (pd[i].getWriteMethod() != null && Arrays.binarySearch(IGNORE, pd[i].getName()) < 0) {
                m = pd[i].getReadMethod();
                try {
                    v = m.invoke(c, null);
                    if (v != null) {
                        if (v instanceof Collection || v instanceof Map || v instanceof Iterator) {
                            continue;
                        }
                        writer.write(" ");
                        writer.write(pd[i].getName());
                        writer.write("=\"");
                        if (v instanceof Expression) {
                            str = ((Expression) v).getExpressionString();
                        }
                        writer.write(str.replaceAll("<", TS));
                        writer.write("\"");
                    }
                } catch (Exception e) {
                    // do nothing
                }
            }
        }

        ValueExpression binding = c.getValueExpression("binding");
        if (binding != null) {
            writer.write(" binding=\"");
            writer.write(binding.getExpressionString().replaceAll("<", TS));
            writer.write("\"");
        }
    } catch (Exception e) {
        // do nothing
    }
}

From source file:org.nuxeo.ecm.platform.ui.web.validator.DocumentConstraintValidator.java

@Override
public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
    if (context == null) {
        throw new NullPointerException();
    }//w w w  .j  av a 2s  . c  o  m
    if (component == null) {
        throw new NullPointerException();
    }
    ValueExpression ve = component.getValueExpression("value");
    if (ve == null) {
        return;
    }

    ValueExpressionAnalyzer expressionAnalyzer = new ValueExpressionAnalyzer(ve);
    ValueReference vref = expressionAnalyzer.getReference(context.getELContext());

    if (log.isDebugEnabled()) {
        log.debug(String.format("Validating  value '%s' for expression '%s', base=%s, prop=%s", value,
                ve.getExpressionString(), vref.getBase(), vref.getProperty()));
    }

    if (isResolvable(vref, ve)) {
        List<ConstraintViolation> violations = doValidate(context, vref, ve, value);
        if (violations != null && !violations.isEmpty()) {
            Locale locale = context.getViewRoot().getLocale();
            if (violations.size() == 1) {
                ConstraintViolation v = violations.iterator().next();
                String msg = v.getMessage(locale);
                throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, msg));
            } else {
                Set<FacesMessage> messages = new LinkedHashSet<FacesMessage>(violations.size());
                for (ConstraintViolation v : violations) {
                    String msg = v.getMessage(locale);
                    messages.add(new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, msg));
                }
                throw new ValidatorException(messages);
            }
        }
    }
}

From source file:org.nuxeo.ecm.platform.ui.web.validator.DocumentConstraintValidator.java

@SuppressWarnings("rawtypes")
private boolean isResolvable(ValueReference ref, ValueExpression ve) {
    if (ve == null || ref == null) {
        return false;
    }/*w w w . jav  a  2  s.  c  o  m*/
    Object base = ref.getBase();
    if (base != null) {
        Class baseClass = base.getClass();
        if (baseClass != null) {
            if (DocumentPropertyContext.class.isAssignableFrom(baseClass)
                    || (Property.class.isAssignableFrom(baseClass))
                    || (ProtectedEditableModel.class.isAssignableFrom(baseClass))
                    || (ListItemMapper.class.isAssignableFrom(baseClass))) {
                return true;
            }
        }
    }
    if (log.isDebugEnabled()) {
        log.debug(String.format("NOT validating %s, base=%s, prop=%s", ve.getExpressionString(), base,
                ref.getProperty()));
    }
    return false;
}

From source file:org.nuxeo.ecm.platform.ui.web.validator.DocumentConstraintValidator.java

protected List<ConstraintViolation> doValidate(FacesContext context, ValueReference vref, ValueExpression e,
        Object value) {/*from ww  w. jav a 2 s  .c  om*/
    DocumentValidationService validationService = Framework.getService(DocumentValidationService.class);
    // document validation
    DocumentValidationReport report = null;
    if (!validationService.isActivated(CTX_JSFVALIDATOR, null)) {
        return null;
    }
    XPathAndField field = resolveField(context, vref, e);
    if (field != null) {
        boolean validateSubs = getHandleSubProperties().booleanValue();
        // use the xpath to validate the field
        // this allow to get the custom message defined for field if there's error
        report = validationService.validate(field.xpath, value, validateSubs);
        if (log.isDebugEnabled()) {
            log.debug(String.format("VALIDATED  value '%s' for expression '%s', base=%s, prop=%s", value,
                    e.getExpressionString(), vref.getBase(), vref.getProperty()));
        }
    } else {
        if (log.isDebugEnabled()) {
            log.debug(String.format("NOT Validating  value '%s' for expression '%s', base=%s, prop=%s", value,
                    e.getExpressionString(), vref.getBase(), vref.getProperty()));
        }
    }

    if (report != null && report.hasError()) {
        return report.asList();
    }

    return null;
}

From source file:org.nuxeo.ecm.platform.ui.web.validator.DocumentConstraintValidator.java

protected XPathAndField resolveField(FacesContext context, ValueReference vref, ValueExpression ve) {
    Object base = vref.getBase();
    Object propObj = vref.getProperty();
    if (propObj != null && !(propObj instanceof String)) {
        // ignore cases where prop would not be a String
        return null;
    }/*w  ww.j  a v  a 2s . c o m*/
    String xpath = null;
    Field field = null;
    String prop = (String) propObj;
    Class<?> baseClass = base.getClass();
    if (DocumentPropertyContext.class.isAssignableFrom(baseClass)) {
        DocumentPropertyContext dc = (DocumentPropertyContext) base;
        xpath = dc.getSchema() + ":" + prop;
        field = getField(xpath);
    } else if (Property.class.isAssignableFrom(baseClass)) {
        xpath = ((Property) base).getPath() + "/" + prop;
        field = getField(((Property) base).getField(), prop);
    } else if (ProtectedEditableModel.class.isAssignableFrom(baseClass)) {
        ProtectedEditableModel model = (ProtectedEditableModel) base;
        ValueExpression listVe = model.getBinding();
        ValueExpressionAnalyzer expressionAnalyzer = new ValueExpressionAnalyzer(listVe);
        ValueReference listRef = expressionAnalyzer.getReference(context.getELContext());
        if (isResolvable(listRef, listVe)) {
            XPathAndField parentField = resolveField(context, listRef, listVe);
            if (parentField != null) {
                field = getField(parentField.field, "*");
                if (parentField.xpath == null) {
                    xpath = field.getName().getLocalName();
                } else {
                    xpath = parentField.xpath + "/" + field.getName().getLocalName();
                }
            }
        }
    } else if (ListItemMapper.class.isAssignableFrom(baseClass)) {
        ListItemMapper mapper = (ListItemMapper) base;
        ProtectedEditableModel model = mapper.getModel();
        ValueExpression listVe;
        if (model.getParent() != null) {
            // move one level up to resolve parent list binding
            listVe = model.getParent().getBinding();
        } else {
            listVe = model.getBinding();
        }
        ValueExpressionAnalyzer expressionAnalyzer = new ValueExpressionAnalyzer(listVe);
        ValueReference listRef = expressionAnalyzer.getReference(context.getELContext());
        if (isResolvable(listRef, listVe)) {
            XPathAndField parentField = resolveField(context, listRef, listVe);
            if (parentField != null) {
                field = getField(parentField.field, prop);
                if (field == null || field.getName() == null) {
                    // it should not happen but still, just in case
                    return null;
                }
                if (parentField.xpath == null) {
                    xpath = field.getName().getLocalName();
                } else {
                    xpath = parentField.xpath + "/" + field.getName().getLocalName();
                }
            }
        }
    } else {
        log.error(String.format("Cannot validate expression '%s, base=%s'", ve.getExpressionString(), base));
    }
    // cleanup / on begin or at end
    if (xpath != null) {
        xpath = StringUtils.strip(xpath, "/");
    } else if (field == null && xpath == null) {
        return null;
    }
    return new XPathAndField(field, xpath);
}

From source file:org.primefaces.component.imagecropper.ImageCropperRenderer.java

/**
 * Attempt to obtain the resource from the server by parsing the valueExpression of the image attribute. Returns null
 * if the valueExpression is not of the form #{resource['path/to/resource']} or #{resource['library:name']}. Otherwise
 * returns the value obtained by ResourceHandler.createResource().
 *//*from  w  w  w. j a v a2s .  com*/
private Resource getImageResource(FacesContext facesContext, ImageCropper imageCropper) {

    Resource resource = null;
    ValueExpression imageValueExpression = imageCropper
            .getValueExpression(ImageCropper.PropertyKeys.image.toString());

    if (imageValueExpression != null) {
        String imageValueExpressionString = imageValueExpression.getExpressionString();

        if (imageValueExpressionString.matches("^[#][{]resource\\['[^']+'\\][}]$")) {

            imageValueExpressionString = imageValueExpressionString.replaceFirst("^[#][{]resource\\['", "");
            imageValueExpressionString = imageValueExpressionString.replaceFirst("'\\][}]$", "");
            String resourceLibrary = null;
            String resourceName;
            String[] resourceInfo = imageValueExpressionString.split(":");

            if (resourceInfo.length == 2) {
                resourceLibrary = resourceInfo[0];
                resourceName = resourceInfo[1];
            } else {
                resourceName = resourceInfo[0];
            }

            if (resourceName != null) {
                Application application = facesContext.getApplication();
                ResourceHandler resourceHandler = application.getResourceHandler();

                if (resourceLibrary != null) {
                    resource = resourceHandler.createResource(resourceName, resourceLibrary);
                } else {
                    resource = resourceHandler.createResource(resourceName);
                }
            }
        }
    }

    return resource;
}

From source file:org.primefaces.extensions.component.sheet.Sheet.java

/**
 * Gets the rendered col index of the column corresponding to the current sortBy. This is used to keep track of the current sort column in the page.
 *
 * @return/*from w  w w.j  ava  2 s . co  m*/
 */
public int getSortColRenderIndex() {
    final ValueExpression veSortBy = getValueExpression(PropertyKeys.sortBy.name());
    if (veSortBy == null) {
        return -1;
    }

    final String sortByExp = veSortBy.getExpressionString();
    int colIdx = 0;
    for (final SheetColumn column : getColumns()) {
        if (!column.isRendered()) {
            continue;
        }

        final ValueExpression veCol = column.getValueExpression(PropertyKeys.sortBy.name());
        if (veCol != null) {
            if (veCol.getExpressionString().equals(sortByExp)) {
                return colIdx;
            }
        }
        colIdx++;
    }
    return -1;
}