123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157 |
- /*
- * Copyright 2004-2011 H2 Group.
- * Copyright 2011 James Moger.
- *
- * 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.iciql.util;
-
- /**
- * A utility class to build a statement. In addition to the methods supported by
- * StringBuilder, it allows to add a text only in the second iteration. This
- * simplified constructs such as:
- *
- * <pre>
- * StringBuilder buff = new StringBuilder();
- * for (int i = 0; i < args.length; i++) {
- * if (i > 0) {
- * buff.append(", ");
- * }
- * buff.append(args[i]);
- * }
- * </pre>
- *
- * to
- *
- * <pre>
- * StatementBuilder buff = new StatementBuilder();
- * for (String s : args) {
- * buff.appendExceptFirst(", ");
- * buff.append(a);
- * }
- * </pre>
- */
- public class StatementBuilder {
-
- private final StringBuilder builder = new StringBuilder();
- private int index;
-
- /**
- * Create a new builder.
- */
- public StatementBuilder() {
- // nothing to do
- }
-
- /**
- * Create a new builder.
- *
- * @param string
- * the initial string
- */
- public StatementBuilder(String string) {
- builder.append(string);
- }
-
- /**
- * Append a text.
- *
- * @param s
- * the text to append
- * @return itself
- */
- public StatementBuilder append(String s) {
- builder.append(s);
- return this;
- }
-
- /**
- * Append a character.
- *
- * @param c
- * the character to append
- * @return itself
- */
- public StatementBuilder append(char c) {
- builder.append(c);
- return this;
- }
-
- /**
- * Append a number.
- *
- * @param x
- * the number to append
- * @return itself
- */
- public StatementBuilder append(long x) {
- builder.append(x);
- return this;
- }
-
- /**
- * Reset the loop counter.
- *
- * @return itself
- */
- public StatementBuilder resetCount() {
- index = 0;
- return this;
- }
-
- /**
- * Append a text, but only if appendExceptFirst was never called.
- *
- * @param s
- * the text to append
- */
- public void appendOnlyFirst(String s) {
- if (index == 0) {
- builder.append(s);
- }
- }
-
- /**
- * Append a text, except when this method is called the first time.
- *
- * @param s
- * the text to append
- */
- public void appendExceptFirst(String s) {
- if (index++ > 0) {
- builder.append(s);
- }
- }
-
- public void append(StatementBuilder sb) {
- builder.append(sb);
- }
-
- public void insert(int offset, char c) {
- builder.insert(offset, c);
- }
-
- public String toString() {
- return builder.toString();
- }
-
- /**
- * Get the length.
- *
- * @return the length
- */
- public int length() {
- return builder.length();
- }
- }
|