OSLValidate.java example

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ontopia-master
/*
 * #!
 * Ontopia Webed
 * #-
 * Copyright (C) 2001 - 2013 The Ontopia Project
 * #-
 * Licensed 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 net.ontopia.topicmaps.webed.impl.actions.tmobject;

import java.util.Iterator;
import net.ontopia.topicmaps.core.AssociationIF;
import net.ontopia.topicmaps.core.TopicIF;
import net.ontopia.topicmaps.core.TopicMapIF;
import net.ontopia.topicmaps.schema.core.SchemaValidatorIF;
import net.ontopia.topicmaps.schema.core.SchemaViolationException;
import net.ontopia.topicmaps.schema.impl.osl.OSLSchema;
import net.ontopia.topicmaps.webed.core.ActionParametersIF;
import net.ontopia.topicmaps.webed.core.ActionResponseIF;
import net.ontopia.topicmaps.webed.core.ActionRuntimeException;
import net.ontopia.topicmaps.webed.core.OSLSchemaAwareIF;
import net.ontopia.topicmaps.webed.impl.utils.ActionSignature;

/**
 * PUBLIC: Action for deleting a topic map object.
 * @since 3.0
 */
public class OSLValidate implements OSLSchemaAwareIF {
  private OSLSchema schema;
  
  public OSLSchema getSchema() {
    return schema;
  }

  public void setSchema(OSLSchema schema) {
    this.schema = schema;
  }
  
  public void perform(ActionParametersIF params, ActionResponseIF response) {
    // validate parameters
    ActionSignature paramsType = ActionSignature.getSignature("mta");
    paramsType.validateArguments(params, this);

    // check for schema
    if (schema == null)
      throw new ActionRuntimeException("No schema found", true);

    // validate objects
    SchemaValidatorIF validator = schema.getValidator();
    Iterator it = params.getCollection(0).iterator();
    while (it.hasNext()) {
      Object object = it.next();

      try {
        if (object instanceof TopicMapIF)
          validator.validate((TopicMapIF) object);
        else if (object instanceof TopicIF)
          validator.validate((TopicIF) object);
        else if (object instanceof AssociationIF)
          validator.validate((AssociationIF) object);
        else
          throw new ActionRuntimeException("INTERNAL ERROR: " + object, true);
      } catch (SchemaViolationException e) {
        throw new ActionRuntimeException("Invalid data", e, true);
      }
    }
  }
}