com.nhaarman.ellie.query.QueryBase Maven / Gradle / Ivy

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Compile-time active record ORM for Android.
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/*
 * Copyright (C) 2014 Michael Pardo
 * Copyright (C) 2014 Niek Haarman
 *
 * 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.nhaarman.ellie.query;

import com.nhaarman.ellie.Model;

public abstract class QueryBase implements Query {

    protected Query mParent;
    protected Class mTable;

    protected QueryBase(final Query parent, final Class table) {
        mParent = parent;
        mTable = table;
    }

    @Override
    public final String getSql() {
        if (mParent != null) {
            return mParent.getSql() + " " + getPartSql().trim();
        }
        return getPartSql().trim();
    }

    @Override
    public final String[] getArgs() {
        if (mParent != null) {
            return join(mParent.getArgs(), getPartArgs());
        }
        return getPartArgs();
    }

    protected String getPartSql() {
        return null;
    }

    protected String[] getPartArgs() {
        return null;
    }

    protected final String[] toStringArray(final Object[] array) {
        if (array == null) {
            return null;
        }
        final String[] transformedArray = new String[array.length];
        for (int i = 0; i < array.length; i++) {
            transformedArray[i] = String.valueOf(array[i]);
        }
        return transformedArray;
    }

    private  String[] join(final String[] array1, final String... array2) {
        if (array1 == null) {
            return clone(array2);
        }
        if (array2 == null) {
            return clone(array1);
        }

        final String[] joinedArray = new String[array1.length + array2.length];
        System.arraycopy(array1, 0, joinedArray, 0, array1.length);
        System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
        return joinedArray;
    }

    private String[] clone(final String[] array) {
        if (array == null) {
            return null;
        }
        return array.clone();
    }
}