com.qagen.osfe.common.utils.DomReader.java Source code

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Here is the source code for com.qagen.osfe.common.utils.DomReader.java

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/* Copyright 2008 Hycel Taylor
 *
 * 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 com.qagen.osfe.common.utils;

import com.qagen.osfe.common.CommonException;
import org.dom4j.Attribute;
import org.dom4j.Element;

public class DomReader {

    public static String getValue(Element element, String attributeName) {
        final Attribute attribute = element.attribute(attributeName);

        if (attribute == null) {
            return null;
        }

        return attribute.getValue();
    }

    public static String getRequiredValue(Element element, String attributeName) {
        final String value = getValue(element, attributeName);

        if (value == null) {
            throw new CommonException(
                    "The attribute, " + attributeName + ", is a required attribute and may not be null.");
        }

        if (value.trim().length() == 0) {
            throw new CommonException(
                    "The attribute, " + attributeName + ", is a required attribute and may not be empty.");
        }

        return value;
    }

    public static Integer getIntValue(Element element, String attributeName) {
        final String value = getValue(element, attributeName);

        if (value != null) {
            return Integer.parseInt(value);
        }

        return null;
    }

    public static Integer getRequiredIntValue(Element element, String attributeName) {
        final Integer value = getIntValue(element, attributeName);

        if (value == null) {
            throw new CommonException(
                    "The attribute, " + attributeName + ", is a required attribute and may not be null.");
        }

        return value;
    }

    public static Long getLongValue(Element element, String attributeName) {
        final String value = getValue(element, attributeName);

        if (value != null) {
            return Long.parseLong(value);
        }

        return null;
    }

    public static Long getRequiredLongValue(Element element, String attributeName) {
        final Long value = getLongValue(element, attributeName);

        if (value == null) {
            throw new CommonException(
                    "The attribute, " + attributeName + ", is a required attribute and may not be null.");
        }

        return value;
    }

    public static Float getFloatValue(Element element, String attributeName) {
        final String value = getValue(element, attributeName);

        if (value != null) {
            return Float.parseFloat(value);
        }

        return null;
    }

    public static Float getRequiredFloatValue(Element element, String attributeName) {
        final Float value = getFloatValue(element, attributeName);

        if (value == null) {
            throw new CommonException(
                    "The attribute, " + attributeName + ", is a required attribute and may not be null.");
        }

        return value;
    }

    public static Boolean getBooleanValue(Element element, String attributeName) {
        final String value = getValue(element, attributeName);

        if (value != null) {
            return Boolean.parseBoolean(value);
        }

        return null;
    }

    public static Boolean getRequiredBooleanValue(Element element, String attributeName) {
        final Boolean value = getBooleanValue(element, attributeName);

        if (value == null) {
            throw new CommonException(
                    "The attribute, " + attributeName + ", is a required attribute and may not be null.");
        }

        return value;
    }

}