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+/*
+ * 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 &lt; args.length; i++) {
+ * if (i &gt; 0) {
+ * buff.append(&quot;, &quot;);
+ * }
+ * buff.append(args[i]);
+ * }
+ * </pre>
+ *
+ * to
+ *
+ * <pre>
+ * StatementBuilder buff = new StatementBuilder();
+ * for (String s : args) {
+ * buff.appendExceptFirst(&quot;, &quot;);
+ * 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;
+ }
+
+ /**
+ * Returns the current value of the loop counter.
+ *
+ * @return the loop counter
+ */
+ public int getCount() {
+ return index;
+ }
+
+ /**
+ * 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();
+ }
+}