GovernanceArtifactFilter.java

/*
*  Copyright (c) 2005-2010, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
*  WSO2 Inc. 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.wso2.carbon.governance.list.util;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.governance.api.common.dataobjects.GovernanceArtifact;
import org.wso2.carbon.governance.api.common.dataobjects.GovernanceArtifactImpl;
import org.wso2.carbon.governance.api.exception.GovernanceException;
import org.wso2.carbon.governance.api.util.GovernanceConstants;

public class GovernanceArtifactFilter {

    private static final Log log = LogFactory.getLog(GovernanceArtifactFilter.class);

    private GovernanceArtifact referenceArtifact; // the artifact to match with

    public GovernanceArtifactFilter(GovernanceArtifact referenceArtifact) {
        this.referenceArtifact = referenceArtifact;
    }

    public boolean matches(GovernanceArtifact service) throws GovernanceException {
        if (referenceArtifact == null) {
            return true;
        }
        String[] keys = ((GovernanceArtifactImpl) referenceArtifact).getAttributeKeys();
        boolean defaultNameMatched = false;
        boolean defaultNamespaceMatched = false;

        for (String key : keys) {
            if ("operation".equals(key)) {
                // this is a special case
                continue;
            }
            if (key.toLowerCase().contains("count")) {
                // we ignore the count.
                continue;
            }
            String[] referenceValues = referenceArtifact.getAttributes(key);
            if (referenceValues == null) {
                continue;
            }
            else {
               if(!defaultNameMatched && "overview_name".equals(key) && GovernanceConstants.DEFAULT_SERVICE_NAME.
                                         equalsIgnoreCase(referenceArtifact.getAttribute("overview_name"))) {
                    defaultNameMatched = true;
                    continue;
               }

               if(!defaultNamespaceMatched && "overview_namespace".equals(key) && GovernanceConstants.DEFAULT_NAMESPACE.
                                              equals(referenceArtifact.getAttribute("overview_namespace"))){
                   defaultNamespaceMatched = true;
                   continue;
               }
            }
            // all the valid keys should be satisfied..
            boolean satisfied = false; // either one of value should be satisfied.
            String[] realValues = service.getAttributes(key);
            if (realValues != null) {
                for (String referenceValue : referenceValues) {
                    for (String realValue : realValues) {
                        if (realValue.toLowerCase().contains(referenceValue.toLowerCase())) {
                            satisfied = true;
                            break;
                        }
                        // the reference value can be regular expression
                        try {
                            if (realValue.matches(referenceValue)) {
                                satisfied = true;
                                break;
                            }
                        } catch (Exception e) {
                            String msg = "Error in performing the regular expression matches for: " +
                                    referenceValue + ".";
                            throw new GovernanceException(msg, e);
                        }
                    }
                    if (satisfied) {
                        break;
                    } else {
                        if (log.isDebugEnabled()) {
                            String msg = "key: " + key + " is not satisfied by the service: " +
                                         service.getQName() + ".";
                            log.debug(msg);
                        }
                        return false;
                    }
                }
            } else {
              return false;
            }

        }
        return true;
    }

}