| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.synapse.config.xml; |
| |
| import org.apache.axiom.om.OMAttribute; |
| import org.apache.axiom.om.OMElement; |
| import org.apache.synapse.Mediator; |
| import org.apache.synapse.SynapseException; |
| import org.apache.synapse.mediators.builtin.PropertyMediator; |
| import org.jaxen.JaxenException; |
| |
| import javax.xml.namespace.QName; |
| import java.util.Properties; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Creates a property mediator through the supplied XML configuration |
| * <p/> |
| * <pre> |
| * <property name="string" [action=set/remove] (value="literal" | expression="xpath") |
| * [scope=(axis2 | axis2-client | transport)]/> |
| * </pre> |
| */ |
| public class PropertyMediatorFactory extends AbstractMediatorFactory { |
| |
| private static final QName ATT_SCOPE = new QName("scope"); |
| private static final QName ATT_ACTION = new QName("action"); |
| private static final QName ATT_TYPE = new QName("type"); |
| private static final QName ATT_PATTERN = new QName("pattern"); |
| private static final QName ATT_GROUP = new QName("group"); |
| |
| public Mediator createSpecificMediator(OMElement elem, Properties properties) { |
| |
| PropertyMediator propMediator = new PropertyMediator(); |
| OMAttribute name = elem.getAttribute(ATT_NAME); |
| OMAttribute value = elem.getAttribute(ATT_VALUE); |
| OMAttribute expression = elem.getAttribute(ATT_EXPRN); |
| OMAttribute scope = elem.getAttribute(ATT_SCOPE); |
| OMAttribute action = elem.getAttribute(ATT_ACTION); |
| OMAttribute type = elem.getAttribute(ATT_TYPE); |
| OMAttribute pattern = elem.getAttribute(ATT_PATTERN); |
| OMAttribute group = elem.getAttribute(ATT_GROUP); |
| |
| OMElement valueElement = elem.getFirstElement(); |
| |
| if (name == null) { |
| String msg = "The 'name' attribute is required for the configuration of a property mediator"; |
| log.error(msg); |
| throw new SynapseException(msg); |
| } else if ((value == null && valueElement == null && expression == null) && |
| !(action != null && "remove".equals(action.getAttributeValue()))) { |
| String msg = "Either a child element or one of 'value', 'expression' attributes is " + |
| "required for a property mediator when action is SET"; |
| log.error(msg); |
| throw new SynapseException(msg); |
| } |
| |
| propMediator.setName(name.getAttributeValue()); |
| String dataType = null; |
| if (type != null) { |
| dataType = type.getAttributeValue(); |
| } |
| |
| if (value != null) { |
| propMediator.setValue(value.getAttributeValue(), dataType); |
| } else if (valueElement != null) { |
| propMediator.setValueElement(valueElement.cloneOMElement()); // Need to clone, |
| // otherwise same reference getting modified at the message flow |
| } else if (expression != null) { |
| try { |
| propMediator.setExpression(SynapseXPathFactory.getSynapseXPath(elem, ATT_EXPRN), |
| dataType); |
| } catch (JaxenException e) { |
| String msg = "Invalid XPath expression for attribute 'expression' : " + |
| expression.getAttributeValue(); |
| log.error(msg); |
| throw new SynapseException(msg); |
| } |
| } |
| |
| if (pattern != null) { |
| propMediator.setPattern(Pattern.compile(pattern.getAttributeValue())); |
| if (group != null) { |
| int groupValue = Integer.parseInt(group.getAttributeValue()); |
| if (groupValue >= 0) { |
| propMediator.setGroup(groupValue); |
| } else { |
| String msg = "group can have a positive value only"; |
| log.error(msg); |
| throw new SynapseException(msg); |
| } |
| } |
| } else if (group != null) { |
| String msg = "group is only allowed when a pattern is specified"; |
| log.error(msg); |
| throw new SynapseException(msg); |
| } |
| |
| // The action attribute is optional, if provided and equals to 'remove' the |
| // property mediator will act as a property remove mediator |
| if (action != null && "remove".equals(action.getAttributeValue())) { |
| propMediator.setAction(PropertyMediator.ACTION_REMOVE); |
| } |
| |
| if (scope != null) { |
| String valueStr = scope.getAttributeValue(); |
| if (!XMLConfigConstants.SCOPE_AXIS2.equals(valueStr) && !XMLConfigConstants.SCOPE_TRANSPORT.equals(valueStr) |
| && !XMLConfigConstants.SCOPE_DEFAULT.equals(valueStr) && !XMLConfigConstants.SCOPE_CLIENT.equals(valueStr)) { |
| String msg = "Only '" + XMLConfigConstants.SCOPE_AXIS2 + "' or '" + XMLConfigConstants.SCOPE_TRANSPORT + "' or '" + XMLConfigConstants.SCOPE_CLIENT |
| + "' values are allowed for attribute scope for a property mediator" |
| + ", Unsupported scope " + valueStr; |
| log.error(msg); |
| throw new SynapseException(msg); |
| } |
| propMediator.setScope(valueStr); |
| } |
| |
| // after successfully creating the mediator |
| // set its common attributes such as tracing etc |
| processAuditStatus(propMediator, elem); |
| |
| return propMediator; |
| } |
| |
| public QName getTagQName() { |
| return PROP_Q; |
| } |
| } |