runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/execution/DefaultExecutionFlowDescriptorConverter.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.argeo.slc.core.execution;
  18
  19 import java.util.Comparator;
  20 import java.util.HashMap;
  21 import java.util.Map;
  22 import java.util.SortedSet;
  23 import java.util.TreeMap;
  24 import java.util.TreeSet;
  25
  26 import org.apache.commons.logging.Log;
  27 import org.apache.commons.logging.LogFactory;
  28 import org.argeo.slc.SlcException;
  29 import org.argeo.slc.UnsupportedException;
  30 import org.argeo.slc.execution.ExecutionFlow;
  31 import org.argeo.slc.execution.ExecutionFlowDescriptor;
  32 import org.argeo.slc.execution.ExecutionFlowDescriptorConverter;
  33 import org.argeo.slc.execution.ExecutionModuleDescriptor;
  34 import org.argeo.slc.execution.ExecutionSpec;
  35 import org.argeo.slc.execution.ExecutionSpecAttribute;
  36 import org.springframework.aop.scope.ScopedObject;
  37 import org.springframework.beans.BeansException;
  38 import org.springframework.beans.factory.config.BeanDefinition;
  39 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
  40 import org.springframework.context.ApplicationContext;
  41 import org.springframework.context.ApplicationContextAware;
  42 import org.springframework.context.ConfigurableApplicationContext;
  43 import org.springframework.util.Assert;
  44 import org.springframework.util.StringUtils;
  45
  46 /**
  47  * Performs conversion in both direction between data exchanged with the agent
  48  * and the data in the application context.
  49  */
  50 public class DefaultExecutionFlowDescriptorConverter implements
  51                 ExecutionFlowDescriptorConverter, ApplicationContextAware {
  52         public final static String REF_VALUE_TYPE_BEAN_NAME = "beanName";
  53
  54         /** Workaround for https://www.spartadn.com/bugzilla/show_bug.cgi?id=206 */
  55         private final static String REF_VALUE_INTERNAL = "[internal]";
  56
  57         private final static Log log = LogFactory
  58                         .getLog(DefaultExecutionFlowDescriptorConverter.class);
  59
  60         private ApplicationContext applicationContext;
  61
  62         public Map<String, Object> convertValues(
  63                         ExecutionFlowDescriptor executionFlowDescriptor) {
  64                 Map<String, Object> values = executionFlowDescriptor.getValues();
  65                 Map<String, Object> convertedValues = new HashMap<String, Object>();
  66                 ExecutionSpec executionSpec = executionFlowDescriptor
  67                                 .getExecutionSpec();
  68
  69                 if (executionSpec == null && log.isTraceEnabled())
  70                         log.warn("Execution spec is null for " + executionFlowDescriptor);
  71
  72                 if (values != null && executionSpec != null) {
  73                         values: for (String key : values.keySet()) {
  74                                 ExecutionSpecAttribute attribute = executionSpec
  75                                                 .getAttributes().get(key);
  76
  77                                 if (attribute.getIsFrozen())
  78                                         continue values;
  79
  80                                 Object value = values.get(key);
  81                                 if (value instanceof PrimitiveValue) {
  82                                         PrimitiveValue primitiveValue = (PrimitiveValue) value;
  83                                         // TODO: check class <=> type
  84                                         convertedValues.put(key, primitiveValue.getValue());
  85                                 } else if (value instanceof RefValue) {
  86                                         RefValue refValue = (RefValue) value;
  87                                         String type = refValue.getType();
  88                                         if (REF_VALUE_TYPE_BEAN_NAME.equals(type)) {
  89                                                 // FIXME: UI should send all information about spec
  90                                                 // - targetClass
  91                                                 // - name
  92                                                 // String executionSpecName = executionSpec.getName();
  93                                                 // ExecutionSpec localSpec = (ExecutionSpec)
  94                                                 // applicationContext
  95                                                 // .getBean(executionSpecName);
  96                                                 // RefSpecAttribute localAttr = (RefSpecAttribute)
  97                                                 // localSpec
  98                                                 // .getAttributes().get(key);
  99                                                 // Class<?> targetClass = localAttr.getTargetClass();
 100                                                 //
 101                                                 // String primitiveType = PrimitiveUtils
 102                                                 // .classAsType(targetClass);
 103                                                 String primitiveType = null;
 104                                                 if (primitiveType != null) {
 105                                                         // not active
 106                                                         String ref = refValue.getRef();
 107                                                         Object obj = PrimitiveUtils.convert(primitiveType,
 108                                                                         ref);
 109                                                         convertedValues.put(key, obj);
 110                                                 } else {
 111                                                         String ref = refValue.getRef();
 112                                                         if (ref != null && !ref.equals(REF_VALUE_INTERNAL)) {
 113                                                                 Object obj = null;
 114                                                                 if (applicationContext.containsBean(ref)) {
 115                                                                         obj = applicationContext.getBean(ref);
 116                                                                 } else {
 117                                                                         // FIXME: hack in order to pass primitive
 118                                                                         obj = ref;
 119                                                                 }
 120                                                                 convertedValues.put(key, obj);
 121                                                         } else {
 122                                                                 log.warn("Cannot interpret " + refValue);
 123                                                         }
 124                                                 }
 125                                         } else if (PrimitiveUtils.typeAsClass(type) != null) {
 126                                                 String ref = refValue.getRef();
 127                                                 Object obj = PrimitiveUtils.convert(type, ref);
 128                                                 convertedValues.put(key, obj);
 129                                         } else {
 130                                                 throw new UnsupportedException("Ref value type",
 131                                                                 refValue.getType());
 132                                         }
 133                                 }
 134                         }
 135                 }
 136                 return convertedValues;
 137         }
 138
 139         public void addFlowsToDescriptor(ExecutionModuleDescriptor md,
 140                         Map<String, ExecutionFlow> executionFlows) {
 141                 SortedSet<ExecutionFlowDescriptor> set = new TreeSet<ExecutionFlowDescriptor>(
 142                                 new ExecutionFlowDescriptorComparator());
 143                 for (String name : executionFlows.keySet()) {
 144                         ExecutionFlow executionFlow = executionFlows.get(name);
 145
 146                         ExecutionFlowDescriptor efd = getExecutionFlowDescriptor(executionFlow);
 147                         ExecutionSpec executionSpec = efd.getExecutionSpec();
 148
 149                         // Add execution spec if necessary
 150                         if (!md.getExecutionSpecs().contains(executionSpec))
 151                                 md.getExecutionSpecs().add(executionSpec);
 152
 153                         // Add execution flow
 154                         set.add(efd);
 155                         // md.getExecutionFlows().add(efd);
 156                 }
 157                 md.getExecutionFlows().addAll(set);
 158         }
 159
 160         public ExecutionFlowDescriptor getExecutionFlowDescriptor(
 161                         ExecutionFlow executionFlow) {
 162                 Assert.notNull(executionFlow.getName());
 163                 String name = executionFlow.getName();
 164
 165                 ExecutionSpec executionSpec = executionFlow.getExecutionSpec();
 166                 Assert.notNull(executionSpec);
 167                 Assert.notNull(executionSpec.getName());
 168
 169                 Map<String, Object> values = new TreeMap<String, Object>();
 170                 for (String key : executionSpec.getAttributes().keySet()) {
 171                         ExecutionSpecAttribute attribute = executionSpec.getAttributes()
 172                                         .get(key);
 173
 174                         if (attribute instanceof PrimitiveSpecAttribute) {
 175                                 if (executionFlow.isSetAsParameter(key)) {
 176                                         Object value = executionFlow.getParameter(key);
 177                                         PrimitiveValue primitiveValue = new PrimitiveValue();
 178                                         primitiveValue.setType(((PrimitiveSpecAttribute) attribute)
 179                                                         .getType());
 180                                         primitiveValue.setValue(value);
 181                                         values.put(key, primitiveValue);
 182                                 } else {
 183                                         // no need to add a primitive value if it is not set,
 184                                         // all necessary information is in the spec
 185                                 }
 186                         } else if (attribute instanceof RefSpecAttribute) {
 187                                 if (attribute.getIsFrozen()) {
 188                                         values.put(key, new RefValue(REF_VALUE_INTERNAL));
 189                                 } else
 190                                         values.put(
 191                                                         key,
 192                                                         buildRefValue((RefSpecAttribute) attribute,
 193                                                                         executionFlow, key));
 194                         } else {
 195                                 throw new SlcException("Unkown spec attribute type "
 196                                                 + attribute.getClass());
 197                         }
 198
 199                 }
 200
 201                 ExecutionFlowDescriptor efd = new ExecutionFlowDescriptor(name, values,
 202                                 executionSpec);
 203                 if (executionFlow.getPath() != null)
 204                         efd.setPath(executionFlow.getPath());
 205                 else
 206                         efd.setPath("");
 207
 208                 // Takes description from spring
 209                 BeanDefinition bd = getBeanFactory().getBeanDefinition(name);
 210                 efd.setDescription(bd.getDescription());
 211                 return efd;
 212         }
 213
 214         @SuppressWarnings(value = { "unchecked" })
 215         protected RefValue buildRefValue(RefSpecAttribute rsa,
 216                         ExecutionFlow executionFlow, String key) {
 217                 RefValue refValue = new RefValue();
 218                 // FIXME: UI should be able to deal with other types
 219                 refValue.setType(REF_VALUE_TYPE_BEAN_NAME);
 220                 Class targetClass = rsa.getTargetClass();
 221                 String primitiveType = PrimitiveUtils.classAsType(targetClass);
 222                 if (primitiveType != null) {
 223                         if (executionFlow.isSetAsParameter(key)) {
 224                                 Object value = executionFlow.getParameter(key);
 225                                 refValue.setRef(value.toString());
 226                         }
 227                         refValue.setType(primitiveType);
 228                         return refValue;
 229                 } else {
 230
 231                         if (executionFlow.isSetAsParameter(key)) {
 232                                 String ref = null;
 233                                 Object value = executionFlow.getParameter(key);
 234                                 if (applicationContext == null) {
 235                                         log.warn("No application context declared, cannot scan ref value.");
 236                                         ref = value.toString();
 237                                 } else {
 238
 239                                         // look for a ref to the value
 240                                         Map<String, Object> beans = getBeanFactory()
 241                                                         .getBeansOfType(targetClass, false, false);
 242                                         // TODO: also check scoped beans
 243                                         beans: for (String beanName : beans.keySet()) {
 244                                                 Object obj = beans.get(beanName);
 245                                                 if (value instanceof ScopedObject) {
 246                                                         // don't call methods of the target of the scope
 247                                                         if (obj instanceof ScopedObject)
 248                                                                 if (value == obj) {
 249                                                                         ref = beanName;
 250                                                                         break beans;
 251                                                                 }
 252                                                 } else {
 253                                                         if (obj.equals(value)) {
 254                                                                 ref = beanName;
 255                                                                 break beans;
 256                                                         }
 257                                                 }
 258                                         }
 259                                 }
 260                                 if (ref == null) {
 261                                         log.warn("Cannot define reference for ref spec attribute "
 262                                                         + key + " in " + executionFlow + " (" + rsa + ")."
 263                                                         + " If it is an inner bean consider put it frozen.");
 264                                         ref = REF_VALUE_INTERNAL;
 265                                 } else {
 266                                         if (log.isTraceEnabled())
 267                                                 log.trace(ref
 268                                                                 + " is the reference for ref spec attribute "
 269                                                                 + key + " in " + executionFlow + " (" + rsa
 270                                                                 + ")");
 271                                 }
 272                                 refValue.setRef(ref);
 273                         }
 274                         return refValue;
 275                 }
 276         }
 277
 278         private ConfigurableListableBeanFactory getBeanFactory() {
 279                 return ((ConfigurableApplicationContext) applicationContext)
 280                                 .getBeanFactory();
 281         }
 282
 283         /** Must be use within the execution application context */
 284         public void setApplicationContext(ApplicationContext applicationContext)
 285                         throws BeansException {
 286                 this.applicationContext = applicationContext;
 287         }
 288
 289         private static class ExecutionFlowDescriptorComparator implements
 290                         Comparator<ExecutionFlowDescriptor> {
 291                 public int compare(ExecutionFlowDescriptor o1,
 292                                 ExecutionFlowDescriptor o2) {
 293                         // TODO: write unit tests for this
 294
 295                         String name1 = o1.getName();
 296                         String name2 = o2.getName();
 297
 298                         String path1 = o1.getPath();
 299                         String path2 = o2.getPath();
 300
 301                         // Check whether name include path
 302                         int lastIndex1 = name1.lastIndexOf('/');
 303                         // log.debug(name1+", "+lastIndex1);
 304                         if (!StringUtils.hasText(path1) && lastIndex1 >= 0) {
 305                                 path1 = name1.substring(0, lastIndex1);
 306                                 name1 = name1.substring(lastIndex1 + 1);
 307                         }
 308
 309                         int lastIndex2 = name2.lastIndexOf('/');
 310                         if (!StringUtils.hasText(path2) && lastIndex2 >= 0) {
 311                                 path2 = name2.substring(0, lastIndex2);
 312                                 name2 = name2.substring(lastIndex2 + 1);
 313                         }
 314
 315                         // Perform the actual comparison
 316                         if (StringUtils.hasText(path1) && StringUtils.hasText(path2)) {
 317                                 if (path1.equals(path2))
 318                                         return name1.compareTo(name2);
 319                                 else if (path1.startsWith(path2))
 320                                         return -1;
 321                                 else if (path2.startsWith(path1))
 322                                         return 1;
 323                                 else
 324                                         return path1.compareTo(path2);
 325                         } else if (!StringUtils.hasText(path1)
 326                                         && StringUtils.hasText(path2)) {
 327                                 return 1;
 328                         } else if (StringUtils.hasText(path1)
 329                                         && !StringUtils.hasText(path2)) {
 330                                 return -1;
 331                         } else if (!StringUtils.hasText(path1)
 332                                         && !StringUtils.hasText(path2)) {
 333                                 return name1.compareTo(name2);
 334                         } else {
 335                                 return 0;
 336                         }
 337                 }
 338
 339         }
 340 }