org.skife.jdbi.v2.BuiltInArgumentFactory Maven / Gradle / Ivy

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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.

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/*
 * 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;

import org.skife.jdbi.v2.tweak.Argument;
import org.skife.jdbi.v2.tweak.ArgumentFactory;

import java.lang.reflect.Constructor;
import java.math.BigDecimal;
import java.net.URL;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.IdentityHashMap;
import java.util.Map;

public final class BuiltInArgumentFactory implements ArgumentFactory
{
    private static final Map b = new IdentityHashMap();

    static {
        b.put(BigDecimal.class, new P(BigDecimalArgument.class));
        b.put(Blob.class, new P(BlobArgument.class));
        b.put(Boolean.class, new P(BooleanArgument.class));
        b.put(boolean.class, new P(BooleanArgument.class));
        b.put(Byte.class, new P(ByteArgument.class));
        b.put(byte.class, new P(ByteArgument.class));
        b.put(byte[].class, new P(ByteArrayArgument.class));
        b.put(Character.class, new P(CharacterArgument.class));
        b.put(char.class, new P(CharacterArgument.class));
        b.put(Clob.class, new P(ClobArgument.class));
        b.put(Double.class, new P(DoubleArgument.class));
        b.put(double.class, new P(DoubleArgument.class));
        b.put(Enum.class, new P(EnumArgument.class));
        b.put(Float.class, new P(FloatArgument.class));
        b.put(float.class, new P(FloatArgument.class));
        b.put(Integer.class, new P(IntegerArgument.class));
        b.put(int.class, new P(IntegerArgument.class));
        b.put(java.util.Date.class, new P(JavaDateArgument.class));
        b.put(Long.class, new P(LongArgument.class));
        b.put(long.class, new P(LongArgument.class));
        b.put(Object.class, new P(ObjectArgument.class));
        b.put(Short.class, new P(ShortArgument.class));
        b.put(short.class, new P(ShortArgument.class));
        b.put(java.sql.Date.class, new P(SqlDateArgument.class));
        b.put(String.class, new P(StringArgument.class));
        b.put(Time.class, new P(TimeArgument.class));
        b.put(Timestamp.class, new P(TimestampArgument.class));
        b.put(URL.class, new P(URLArgument.class));
    }

    public static boolean canAccept(Class expectedType)
    {
        return b.containsKey(expectedType) || expectedType.isEnum();
    }

    BuiltInArgumentFactory(){}

    @Override
    public boolean accepts(Class expectedType, Object value, StatementContext ctx)
    {
        return canAccept(expectedType);
    }

    @Override
    public Argument build(Class expectedType, Object value, StatementContext ctx)
    {
        P p;
        if (expectedType.isEnum()) {
            p = b.get(Enum.class);
        } else {
            p = b.get(expectedType);
        }

        if (value != null && expectedType == Object.class) {
            P v = b.get(value.getClass());
            if (v != null) {
                return v.build(value);
            }
        }
        return p.build(value);
    }

    private static class P
    {
        private final Constructor ctor;

        P(Class argType)
        {
            this.ctor = argType.getDeclaredConstructors()[0];
        }

        public Argument build(Object value)
        {
            try {
                return (Argument) ctor.newInstance(value);
            }
            catch (Exception e) {
                throw new IllegalStateException(e);
            }
        }
    }
}