package net.sf.jsqlparser.util.deparser;
import java.util.Iterator;
import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.ExpressionVisitor;
import net.sf.jsqlparser.expression.operators.relational.ExpressionList;
import net.sf.jsqlparser.expression.operators.relational.ItemsListVisitor;
import net.sf.jsqlparser.schema.Column;
import net.sf.jsqlparser.statement.replace.Replace;
import net.sf.jsqlparser.statement.select.SelectVisitor;
import net.sf.jsqlparser.statement.select.SubSelect;
/**
* A class to de-parse (that is, tranform from JSqlParser hierarchy into a string)
* a {@link net.sf.jsqlparser.statement.replace.Replace}
*/
public class ReplaceDeParser implements ItemsListVisitor {
protected StringBuffer buffer;
protected ExpressionVisitor expressionVisitor;
protected SelectVisitor selectVisitor;
public ReplaceDeParser() {
}
/**
* @param expressionVisitor a {@link ExpressionVisitor} to de-parse expressions. It has to share the same<br>
* StringBuffer (buffer parameter) as this object in order to work
* @param selectVisitor a {@link SelectVisitor} to de-parse {@link net.sf.jsqlparser.statement.select.Select}s.
* It has to share the same<br>
* StringBuffer (buffer parameter) as this object in order to work
* @param buffer the buffer that will be filled with the select
*/
public ReplaceDeParser(ExpressionVisitor expressionVisitor, SelectVisitor selectVisitor, StringBuffer buffer) {
this.buffer = buffer;
this.expressionVisitor = expressionVisitor;
this.selectVisitor = selectVisitor;
}
public StringBuffer getBuffer() {
return buffer;
}
public void setBuffer(StringBuffer buffer) {
this.buffer = buffer;
}
public void deParse(Replace replace) {
buffer.append("REPLACE " + replace.getTable().getWholeTableName());
if (replace.getItemsList() != null) {
if (replace.getColumns() != null) {
buffer.append(" (");
for (int i = 0; i < replace.getColumns().size(); i++) {
Column column = (Column) replace.getColumns().get(i);
buffer.append(column.getWholeColumnName());
if (i < replace.getColumns().size() - 1) {
buffer.append(", ");
}
}
buffer.append(") ");
} else {
buffer.append(" ");
}
} else {
buffer.append(" SET ");
for (int i = 0; i < replace.getColumns().size(); i++) {
Column column = (Column) replace.getColumns().get(i);
buffer.append(column.getWholeColumnName() + "=");
Expression expression = (Expression) replace.getExpressions().get(i);
expression.accept(expressionVisitor);
if (i < replace.getColumns().size() - 1) {
buffer.append(", ");
}
}
}
}
public void visit(ExpressionList expressionList) {
buffer.append(" VALUES (");
for (Iterator iter = expressionList.getExpressions().iterator(); iter.hasNext();) {
Expression expression = (Expression) iter.next();
expression.accept(expressionVisitor);
if (iter.hasNext())
buffer.append(", ");
}
buffer.append(")");
}
public void visit(SubSelect subSelect) {
subSelect.getSelectBody().accept(selectVisitor);
}
public ExpressionVisitor getExpressionVisitor() {
return expressionVisitor;
}
public SelectVisitor getSelectVisitor() {
return selectVisitor;
}
public void setExpressionVisitor(ExpressionVisitor visitor) {
expressionVisitor = visitor;
}
public void setSelectVisitor(SelectVisitor visitor) {
selectVisitor = visitor;
}
}