com.frand.easyandroid.db.sql.FFUpdateSqlBuilder.java Source code

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Here is the source code for com.frand.easyandroid.db.sql.FFUpdateSqlBuilder.java

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/*
 * Copyright (C) 2013 frandfeng
 *
 * 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.frand.easyandroid.db.sql;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;

import org.apache.http.NameValuePair;

import android.text.TextUtils;

import com.frand.easyandroid.db.annotation.FFPrimaryKey;
import com.frand.easyandroid.db.entity.FFArrayList;
import com.frand.easyandroid.db.util.FFDBUtils;
import com.frand.easyandroid.exception.FFDBException;
import com.frand.easyandroid.util.FFStringUtil;
import com.frand.easyandroid.util.FFFieldUtil;

public class FFUpdateSqlBuilder extends FFSqlBuilder {

    @Override
    public void onPreGetStatement() throws FFDBException, IllegalArgumentException, IllegalAccessException {
        if (getUpdateFields() == null) {
            setUpdateFields(getFieldsAndValue(entity));
        }
        super.onPreGetStatement();
    }

    @Override
    public String buildSql() throws FFDBException, IllegalArgumentException, IllegalAccessException {
        StringBuilder stringBuilder = new StringBuilder(256);
        stringBuilder.append("UPDATE ");
        stringBuilder.append(tableName).append(" SET ");
        FFArrayList needUpdate = getUpdateFields();
        for (int i = 0; i < needUpdate.size(); i++) {
            NameValuePair nameValuePair = needUpdate.get(i);
            stringBuilder.append(nameValuePair.getName()).append(" = ");
            String value = nameValuePair.getValue().toString();
            if (FFStringUtil.isNumeric(value)) {
                stringBuilder.append(value);
            } else {
                stringBuilder.append("'" + nameValuePair.getValue() + "'");
            }
            if (i + 1 < needUpdate.size()) {
                stringBuilder.append(", ");
            }
        }
        if (!TextUtils.isEmpty(this.where)) {
            stringBuilder.append(buildConditionString());
        } else {
            stringBuilder.append(buildWhere(buildWhere(this.entity)));
        }
        return stringBuilder.toString();
    }

    /**
     * where?where?primaryKey
     * 
     * @param entity
     * @return
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     * @throws FFDBException
     */
    public FFArrayList buildWhere(Object entity)
            throws IllegalArgumentException, IllegalAccessException, FFDBException {
        Class<?> clazz = entity.getClass();
        FFArrayList whereArrayList = new FFArrayList();
        Field[] fields = clazz.getDeclaredFields();
        for (Field field : fields) {
            field.setAccessible(true);
            if (!FFDBUtils.isTransient(field) && FFFieldUtil.isBaseDateType(field)) {
                Annotation annotation = field.getAnnotation(FFPrimaryKey.class);
                if (annotation != null) {
                    String columnName = FFDBUtils.getColumnByField(field);
                    whereArrayList.add(
                            (columnName != null && !columnName.equals("")) ? columnName : field.getName(),
                            field.get(entity).toString());
                }
            }
        }
        if (whereArrayList.isEmpty()) {
            throw new FFDBException("?Where??");
        }
        return whereArrayList;
    }
}