org.opentestsystem.authoring.testauth.config.TestAuthUtil.java Source code

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Here is the source code for org.opentestsystem.authoring.testauth.config.TestAuthUtil.java

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/*******************************************************************************
 * Educational Online Test Delivery System
 * Copyright (c) 2013 American Institutes for Research
 * 
 * Distributed under the AIR Open Source License, Version 1.0
 * See accompanying file AIR-License-1_0.txt or at
 * http://www.smarterapp.org/documents/American_Institutes_for_Research_Open_Source_Software_License.pdf
 ******************************************************************************/
package org.opentestsystem.authoring.testauth.config;

import java.lang.reflect.InvocationTargetException;
import java.util.AbstractMap.SimpleEntry;
import java.util.List;
import java.util.Map;

import org.apache.commons.beanutils.BeanUtils;
import org.opentestsystem.authoring.testauth.domain.AssessmentChild;
import org.opentestsystem.shared.exception.LocalizedException;
import org.springframework.validation.FieldError;

import com.google.common.base.Function;
import com.google.common.base.Predicates;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

public final class TestAuthUtil {

    public static final String DEFAULT_VERSION = "1.0";

    private TestAuthUtil() {
        // singleton
    }

    // ========================================================================================================================================================================
    // utility
    public static <O extends Object, T extends Object> List<T> nullsafeListTransform(
            final Iterable<? extends O> iterableToFilter, final Function<O, T> transformerFunction) {
        if (iterableToFilter == null) {
            return Lists.newArrayList();
        }
        return Lists.newArrayList(
                Iterables.filter(Iterables.transform(iterableToFilter, transformerFunction), Predicates.notNull()));
    }

    public static String[] paramArray(final String... param) {
        return param;
    }

    public static Map<String, String[]> searchParamsByAssessmentIdSmall(final String assessmentId) {
        return Maps.newHashMap(ImmutableMap.of("assessmentId", paramArray(assessmentId)));
    }

    public static Map<String, String[]> searchParamsByAssessmentIdLarge(final String assessmentId) {
        return Maps.newHashMap(
                ImmutableMap.of("assessmentId", paramArray(assessmentId), "pageSize", paramArray("10000")));
    }

    public static int safeParseInt(final String val) {
        try {
            return Integer.parseInt(val);
        } catch (final NumberFormatException e) {
            return 0;
        }
    }

    public static int safeParseInt(final Integer intVal) {
        return intVal == null ? 0 : intVal;
    }

    public static final class ASSESSMENT_CHILD_COPY_XFORMER<T extends AssessmentChild> implements Function<T, T> {
        private final String newAssessmentId;

        @SuppressWarnings("rawtypes")
        public static ASSESSMENT_CHILD_COPY_XFORMER getInstance(final String newAssessmentId) {
            return new ASSESSMENT_CHILD_COPY_XFORMER(newAssessmentId);
        }

        public ASSESSMENT_CHILD_COPY_XFORMER(final String newAssessmentId) {
            this.newAssessmentId = newAssessmentId;
        }

        @Override
        public T apply(final T oldAssessmentChild) {
            final T newAssessmentChild = safeClone(oldAssessmentChild);
            newAssessmentChild.setId(null);
            newAssessmentChild.setAssessmentId(this.newAssessmentId);
            newAssessmentChild.setCopyId(oldAssessmentChild.getId());
            return newAssessmentChild;
        }
    }

    public static final Function<AssessmentChild, SimpleEntry<String, String>> ASSESSMENT_CHILD_KEYMAP_XFORMER = new Function<AssessmentChild, SimpleEntry<String, String>>() {
        @Override
        public SimpleEntry<String, String> apply(final AssessmentChild assessmentChild) {
            return new SimpleEntry<String, String>(assessmentChild.getCopyId(), assessmentChild.getId());
        }
    };

    public static FieldError buildValidationFieldError(final String objectName, final String fieldName,
            final String messageKey, final String[] messageParams) {
        return new FieldError(objectName, fieldName, null, false, paramArray(messageKey), messageParams,
                messageKey);
    }

    @SuppressWarnings("unchecked")
    public static <T extends Object> T safeClone(final T objectToClone) {
        T returnedClone = null;

        try {
            returnedClone = (T) BeanUtils.cloneBean(objectToClone);
        } catch (final IllegalAccessException | InstantiationException | InvocationTargetException
                | NoSuchMethodException e) {
            throw new LocalizedException("unsuccessful.clone", e);
        }

        return returnedClone;
    }
}