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A library provides facade api for data accessing.
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package net.cassite.daf4j;

import java.util.ArrayList;
import java.util.List;

/**
 * 查询条件中的与操作

 * 该对象中存储的对象应当以"与"逻辑操作连接起来
 */
public class And implements Where, AndOr {
        final List conditions = new ArrayList();
        final List ors = new ArrayList();
        final List expBools = new ArrayList();

        @Override
        public And and(Condition condition) {
                conditions.add(condition);
                return this;
        }

        @Override
        public And and(And a) {
                this.conditions.addAll(a.conditions);
                this.ors.addAll(a.ors);
                return this;
        }

        @Override
        public And and(Or o) {
                ors.add(o);
                return this;
        }

        @Override
        public And and(ExpressionBoolean expBool) {
                this.expBools.add(expBool);
                return this;
        }

        @Override
        public Or or(Condition condition) {
                Or o = new Or();
                o.conditions.add(condition);
                o.ands.add(this);
                return o;
        }

        @Override
        public Or or(Or o) {
                o.ands.add(this);
                return o;
        }

        @Override
        public Or or(ExpressionBoolean expBool) {
                Or o = new Or();
                o.ands.add(this);
                o.expBools.add(expBool);
                return o;
        }

        @Override
        public Or or(And a) {
                Or o = new Or();
                o.ands.add(this);
                o.ands.add(a);
                return o;
        }

        /**
         * 获取存储的"或"逻辑操作对象
         *
         * @return 存放Or的List
         */
        public List getOrList() {
                return ors;
        }

        /**
         * 获取存储的"条件"对象
         *
         * @return 存放Condition的List
         */
        public List getConditionList() {
                return conditions;
        }

        /**
         * 获取存储的"返回布尔值的表达式"对象
         *
         * @return 存放ExpressionBoolean的List
         */
        public List getExpBoolList() {
                return expBools;
        }

        @Override
        public boolean isAnd() {
                return true;
        }

        @Override
        public boolean isOr() {
                return false;
        }

        @Override
        public boolean isCondition() {
                return false;
        }

        @Override
        public boolean isExpression() {
                return false;
        }

        @Override
        public String toString() {
                StringBuilder sb = new StringBuilder();
                boolean isFirst = true;
                for (Condition c : conditions) {
                        if (isFirst) {
                                isFirst = false;
                        } else {
                                sb.append(" and ");
                        }
                        sb.append(c.toString());
                }
                for (Or o : ors) {
                        if (isFirst) {
                                isFirst = false;
                        } else {
                                sb.append(" and ");
                        }
                        sb.append("(").append(o.toString()).append(")");
                }
                for (ExpressionBoolean expBool : expBools) {
                        if (isFirst) {
                                isFirst = false;
                        } else {
                                sb.append(" and ");
                        }
                        sb.append(expBool);
                }
                return sb.toString();
        }
}