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• 0.18
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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.Modifier;
import java.lang.reflect.ParameterizedType;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import java.util.logging.Level;
import java.util.logging.Logger;
import static java.util.logging.Logger.getLogger;


/**
 * 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 = getLogger(Metadata.class.getName());


    public static final String DMDB_SUPPRESS_UNKNOWN_COLUMNS
        = "dmdb.suppressUnknownColumns";


    public static final String DMDB_SUPPRESS_UNKNOWN_METHODS
        = "dmdb.suppressUnknownMethods";


    public static final String DMDB_EMPTY_CATALOG_IF_NONE
        = "dmdb.emptyCatalogIfNone";


    public static final String DMDB_EMPTY_SCHEMA_IF_NONE
        = "dmdb.emptySchemaIfNone";


    private static String suppression(
        final Class beanClass, final Field beanField) {

        return decapitalize(beanClass.getSimpleName()) + "/"
               + beanField.getName();
    }


    /**
     * Creates a new instance with given {@code DatabaseMetaData}.
     *
     * @param database the {@code DatabaseMetaData} instance to hold.
     */
    public MetadataContext(final DatabaseMetaData database) {

        super();

        if (database == null) {
            throw new NullPointerException("null database");
        }

        this.database = database;
    }


    private boolean addSuppression(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 addSuppressions(
        final String suppression, final String... otherSuppressions) {

        addSuppression(suppression);

        if (otherSuppressions != null) {
            for (final String otherSuppression : otherSuppressions) {
                addSuppression(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