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REDNACO Commons and Utils for Java.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 io.github.matteobertozzi.rednaco.strings;
import java.util.Map;
public final class StringBuilderUtil {
private StringBuilderUtil() {
// no-op
}
// ====================================================================================================
// Value Appender Converter
// ====================================================================================================
@FunctionalInterface
public interface ValueAppenderConverter {
void append(StringBuilder builder, Object value);
}
// ====================================================================================================
// Append Value
// ====================================================================================================
public static StringBuilder appendValue(final StringBuilder builder, final Object value) {
if (value == null) return builder.append("null");
final Class clazz = value.getClass();
if (clazz.isPrimitive()) {
return builder.append(value);
}
if (clazz.isArray()) {
return switch (value) {
case final byte[] bArray -> appendArray(builder, bArray);
case final int[] iArray -> appendArray(builder, iArray);
case final long[] lArray -> appendArray(builder, lArray);
case final short[] sArray -> appendArray(builder, sArray);
case final float[] fArray -> appendArray(builder, fArray);
case final double[] dArray -> appendArray(builder, dArray);
case final boolean[] bArray -> appendArray(builder, bArray);
case final Object[] oArray -> appendArray(builder, oArray);
default -> builder.append(value);
};
} else if (value instanceof final Map map) {
return appendMap(builder, map);
}
return builder.append(value);
}
// ====================================================================================================
// Append Array
// ====================================================================================================
public static StringBuilder appendArray(final StringBuilder builder, final boolean[] a) {
if (a == null) return builder.append("null");
return appendArray(builder, a, 0, a.length);
}
public static StringBuilder appendArray(final StringBuilder builder, final boolean[] a, final int off, final int len) {
if (a == null) return builder.append("null");
if (len == 0) return builder.append("[]");
builder.append('[');
builder.append(a[off]);
for (int i = 1; i < len; ++i) {
builder.append(", ").append(a[off + i]);
}
return builder.append(']');
}
public static StringBuilder appendArray(final StringBuilder builder, final byte[] a) {
if (a == null) return builder.append("null");
return appendArray(builder, a, 0, a.length);
}
public static StringBuilder appendArray(final StringBuilder builder, final byte[] a, final int off, final int len) {
if (a == null) return builder.append("null");
if (len == 0) return builder.append("[]");
builder.append('[');
builder.append(a[off]);
for (int i = 1; i < len; ++i) {
builder.append(", ").append(a[off + i]);
}
return builder.append(']');
}
public static StringBuilder appendArray(final StringBuilder builder, final short[] a) {
if (a == null) return builder.append("null");
return appendArray(builder, a, 0, a.length);
}
public static StringBuilder appendArray(final StringBuilder builder, final short[] a, final int off, final int len) {
if (a == null) return builder.append("null");
if (len == 0) return builder.append("[]");
builder.append('[');
builder.append(a[off]);
for (int i = 1; i < len; ++i) {
builder.append(", ").append(a[off + i]);
}
return builder.append(']');
}
public static StringBuilder appendArray(final StringBuilder builder, final int[] a) {
if (a == null) return builder.append("null");
return appendArray(builder, a, 0, a.length);
}
public static StringBuilder appendArray(final StringBuilder builder, final int[] a, final int off, final int len) {
if (a == null) return builder.append("null");
if (len == 0) return builder.append("[]");
builder.append('[');
builder.append(a[off]);
for (int i = 1; i < len; ++i) {
builder.append(", ").append(a[off + i]);
}
return builder.append(']');
}
public static StringBuilder appendArray(final StringBuilder builder, final long[] a) {
if (a == null) return builder.append("null");
return appendArray(builder, a, 0, a.length);
}
public static StringBuilder appendArray(final StringBuilder builder, final long[] a, final int off, final int len) {
if (a == null) return builder.append("null");
if (len == 0) return builder.append("[]");
builder.append('[');
builder.append(a[off]);
for (int i = 1; i < len; ++i) {
builder.append(", ").append(a[off + i]);
}
return builder.append(']');
}
public static StringBuilder appendArray(final StringBuilder builder, final float[] a) {
if (a == null) return builder.append("null");
return appendArray(builder, a, 0, a.length);
}
public static StringBuilder appendArray(final StringBuilder builder, final float[] a, final int off, final int len) {
if (a == null) return builder.append("null");
if (len == 0) return builder.append("[]");
builder.append('[');
builder.append(a[off]);
for (int i = 1; i < len; ++i) {
builder.append(", ").append(a[off + i]);
}
return builder.append(']');
}
public static StringBuilder appendArray(final StringBuilder builder, final double[] a) {
if (a == null) return builder.append("null");
return appendArray(builder, a, 0, a.length);
}
public static StringBuilder appendArray(final StringBuilder builder, final double[] a, final int off, final int len) {
if (a == null) return builder.append("null");
if (len == 0) return builder.append("[]");
builder.append('[');
builder.append(a[off]);
for (int i = 1; i < len; ++i) {
builder.append(", ").append(a[off + i]);
}
return builder.append(']');
}
public static StringBuilder appendArray(final StringBuilder builder, final Object[] a) {
if (a == null) return builder.append("null");
return appendArray(builder, a, 0, a.length);
}
public static StringBuilder appendArray(final StringBuilder builder, final Object[] a, final int off, final int len) {
if (a == null) return builder.append("null");
if (len == 0) return builder.append("[]");
builder.append('[');
builder.append(a[off]);
for (int i = 1; i < len; ++i) {
builder.append(", ").append(a[off + i]);
}
return builder.append(']');
}
// ====================================================================================================
// Append Map
// ====================================================================================================
public static StringBuilder appendMap(final StringBuilder builder, final Map map) {
builder.append('{');
int index = 0;
for (final Map.Entry entry: map.entrySet()) {
if (index++ > 0) builder.append(", ");
appendValue(builder, entry.getKey());
builder.append(':');
appendValue(builder, entry.getValue());
}
return builder.append('}');
}
}
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