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• 1.0.4
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• MetadataContext.java

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com.github.jinahya.sql.database.metadata.bind.MetadataContext Maven / Gradle / Ivy

/*
 * Copyright 2015 Jin Kwon <jinahya_at_gmail.com>.
 *
 * 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.github.jinahya.sql.database.metadata.bind;

import static java.beans.Introspector.decapitalize;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeSet;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * A context class for retrieving information from an instance of
 * {@link java.sql.DatabaseMetaData}.
 *
 * @author Jin Kwon <jinahya_at_gmail.com>
 */
public class MetadataContext {

    private static final Logger logger
            = Logger.getLogger(Metadata.class.getName());

    private static String suppression(final Class klass, final Field field) {
        return decapitalize(klass.getSimpleName()) + "/" + field.getName();
    }

    /**
     * Creates a new instance with given {@code DatabaseMetaData}.
     *
     * @param context the {@code DatabaseMetaData} instance to hold.
     */
    public MetadataContext(final DatabaseMetaData context) {
        super();
        if (context == null) {
            throw new NullPointerException("null context");
        }
        this.context = context;
    }

    private boolean suppression(final String suppression) {
        if (suppression == null) {
            throw new NullPointerException("null suppression");
        }
        if (suppressions == null) {
            suppressions = new TreeSet();
        }
        return suppressions.add(suppression);
    }

    /**
     * Add suppression paths.
     *
     * @param suppression the first suppression
     * @param otherSuppressions other suppressions
     *
     * @return this
     */
    public MetadataContext suppressions(
            final String suppression, final String... otherSuppressions) {
        suppression(suppression);
        if (otherSuppressions != null) {
            for (final String otherSuppression : otherSuppressions) {
                suppression(otherSuppression);
            }
        }
        return this;
    }

    private boolean suppressed(final String suppression) {
        if (suppression == null) {
            throw new NullPointerException("null suppression");
        }
        if (suppressions == null) {
            return false;
        }
        return suppressions.contains(suppression);
    }

    private void setValue(final Field field, final Object bean,
                          final Object value, final Object[] args)
            throws ReflectiveOperationException, SQLException {
        final Class fieldType = field.getType();
        if (fieldType == List.class) {
            if (value == null) {
                return;
            }
            @SuppressWarnings("unchecked")
            List