org.skife.jdbi.v2.sqlobject.BindMapFactory Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jdbi Show documentation

jDBI is designed to provide convenient tabular data access in Java(tm). It uses the Java collections framework for query results, provides a convenient means of externalizing sql statements, and provides named parameter support for any database being used.

There is a newer version: 2.78

Show newest version

/*
 * 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 org.skife.jdbi.v2.sqlobject;

import java.lang.annotation.Annotation;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import org.skife.jdbi.v2.SQLStatement;

class BindMapFactory implements BinderFactory
{
    @Override
    public Binder build(Annotation annotation)
    {
        return new Binder>()
        {
            @Override
            public void bind(SQLStatement q, BindMap bind, Map map) {
                final String prefix;
                if (BindBean.BARE_BINDING.equals(bind.prefix())) {
                    prefix = "";
                }
                else {
                    prefix = bind.prefix() + ".";
                }

                final Set allowedKeys = new HashSet(Arrays.asList(bind.value()));

                for (Entry e : map.entrySet()) {
                    final Object keyObj = e.getKey();
                    final String key;
                    if (bind.implicitKeyStringConversion() || (keyObj instanceof String)) {
                        key = keyObj.toString();
                    } else {
                        throw new IllegalArgumentException("Key " + keyObj + " (of " + keyObj.getClass() + ") must be a String");
                    }

                    if (allowedKeys.isEmpty() || allowedKeys.remove(key)) {
                        q.bind(prefix + key, e.getValue());
                    }
                }

                // Any leftover keys were specified but not found in the map, so bind as null
                for (String key : allowedKeys) {
                    final Object val = map.get(key);
                    if (val != null) {
                        throw new IllegalStateException("Internal error: map iteration missed key " + key);
                    }
                    q.bind(prefix + key, (Object) null);
                }
            }
        };
    }
}