/*
* JEF - Copyright 2009-2010 Jiyi (mr.jiyi@gmail.com)
*
* 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 jef.database.jsqlparser.statement.select;
import java.util.List;
import jef.database.jsqlparser.Util;
import jef.database.jsqlparser.expression.Column;
import jef.database.jsqlparser.statement.SqlAppendable;
import jef.database.jsqlparser.visitor.Expression;
import jef.database.jsqlparser.visitor.FromItem;
import jef.database.jsqlparser.visitor.SelectItemVisitor;
/**
* A join clause
*/
public class Join implements SqlAppendable{
private boolean outer = false;
private boolean right = false;
private boolean left = false;
private boolean natural = false;
private boolean full = false;
private boolean inner = false;
private boolean simple = false;
private FromItem rightItem;
private Expression onExpression;
private List<Column> usingColumns;
/**
* Whether is a tab1,tab2 join
*
* @return true if is a "tab1,tab2" join
*/
public boolean isSimple() {
return simple;
}
public void setSimple(boolean b) {
simple = b;
}
/**
* Whether is a "INNER" join
*
* @return true if is a "INNER" join
*/
public boolean isInner() {
return inner;
}
public void setInner(boolean b) {
inner = b;
}
/**
* Whether is a "OUTER" join
*
* @return true if is a "OUTER" join
*/
public boolean isOuter() {
return outer;
}
public void setOuter(boolean b) {
outer = b;
}
/**
* Whether is a "LEFT" join
*
* @return true if is a "LEFT" join
*/
public boolean isLeft() {
return left;
}
public void setLeft(boolean b) {
left = b;
}
/**
* Whether is a "RIGHT" join
*
* @return true if is a "RIGHT" join
*/
public boolean isRight() {
return right;
}
public void setRight(boolean b) {
right = b;
}
/**
* Whether is a "NATURAL" join
*
* @return true if is a "NATURAL" join
*/
public boolean isNatural() {
return natural;
}
public void setNatural(boolean b) {
natural = b;
}
/**
* Whether is a "FULL" join
*
* @return true if is a "FULL" join
*/
public boolean isFull() {
return full;
}
public void setFull(boolean b) {
full = b;
}
/**
* Returns the right item of the join
*/
public FromItem getRightItem() {
return rightItem;
}
public void setRightItem(FromItem item) {
rightItem = item;
}
/**
* Returns the "ON" expression (if any)
*/
public Expression getOnExpression() {
return onExpression;
}
public void setOnExpression(Expression expression) {
onExpression = expression;
}
/**
* Returns the "USING" list of {@link jef.database.jsqlparser.expression.Column}
* s (if any)
*/
public List<Column> getUsingColumns() {
return usingColumns;
}
public void setUsingColumns(List<Column> list) {
usingColumns = list;
}
public String toString() {
StringBuilder sb=new StringBuilder();
appendTo(sb);
return sb.toString();
}
public void appendTo(StringBuilder sb){
if(this.simple){
rightItem.appendTo(sb);
}else{
if (isRight())
sb.append("RIGHT ");
else if (isNatural())
sb.append("NATURAL ");
else if (isFull())
sb.append("FULL ");
else if (isLeft())
sb.append("LEFT ");
if (isOuter())
sb.append("OUTER ");
else if (isInner())
sb.append("INNER ");
sb.append("JOIN ");
rightItem.appendTo(sb);
if(onExpression != null){
sb.append(" ON ");
onExpression.appendTo(sb);
}
Util.getFormatedList(sb,usingColumns, " using", true);
}
}
public void accept(SelectItemVisitor visitor){
visitor.visit(this);
}
}