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/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdc.be.model.tosca.validators;

import org.openecomp.sdc.be.config.Configuration.ToscaValidatorsConfig;
import org.openecomp.sdc.be.config.ConfigurationManager;
import org.openecomp.sdc.be.model.DataTypeDefinition;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.openecomp.sdc.common.util.ValidationUtils;

import java.util.Map;

public class StringValidator implements PropertyTypeValidator {

    public static final int DEFAULT_STRING_MAXIMUM_LENGTH = 2500;

    private static int STRING_MAXIMUM_LENGTH = DEFAULT_STRING_MAXIMUM_LENGTH;

    private static final Logger log = Logger.getLogger(StringValidator.class.getName());

    private static StringValidator stringValidator = new StringValidator();

    private StringValidator() {
        if (ConfigurationManager.getConfigurationManager() != null) {
            ToscaValidatorsConfig toscaValidators = ConfigurationManager.getConfigurationManager().getConfiguration()
                    .getToscaValidators();
            log.debug("toscaValidators= {}", toscaValidators);
            if (toscaValidators != null) {
                Integer stringMaxLength = toscaValidators.getStringMaxLength();
                if (stringMaxLength != null) {
                    STRING_MAXIMUM_LENGTH = stringMaxLength;
                }
            }
        }
    }

    public static StringValidator getInstance() {
        return stringValidator;
    }

    @Override
    public boolean isValid(String value, String innerType, Map<String, DataTypeDefinition> allDataTypes) {

        if (value == null || value.isEmpty()) {
            return true;
        }

        if (value.length() > STRING_MAXIMUM_LENGTH) {
            log.debug("parameter String length {} is higher than configured({})", value.length(), STRING_MAXIMUM_LENGTH);
            return false;
        }
        String converted = ValidationUtils.removeNoneUtf8Chars(value);
        boolean isValid = ValidationUtils.validateIsAscii(converted);

        if (!isValid && log.isDebugEnabled()) {
            log.debug("parameter String value {} is not an ascii string.", value.substring(0, Math.min(value.length(), 20)));
        }

        return isValid;
    }

    @Override
    public boolean isValid(String value, String innerType) {
        return isValid(value, innerType, null);
    }
}