org.thymeleaf.util.JavaScriptUtils Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of thymeleaf Show documentation
Show all versions of thymeleaf Show documentation
Modern server-side Java template engine for both web and standalone environments
/*
* =============================================================================
*
* Copyright (c) 2011-2012, The THYMELEAF team (http://www.thymeleaf.org)
*
* 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 org.thymeleaf.util;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;
/**
*
* @author Daniel Fernández
*
* @since 1.0
*
*/
public final class JavaScriptUtils {
public static String escapeString(final String str) {
final StringBuilder output = new StringBuilder();
escapeString(output, str);
return output.toString();
}
public static String print(final Object object) {
final StringBuilder output = new StringBuilder();
print(output, object);
return output.toString();
}
public static String printString(final String str) {
final StringBuilder output = new StringBuilder();
if (str == null) {
printNull(output);
} else {
printString(output, str);
}
return output.toString();
}
public static String printNumber(final Number number) {
final StringBuilder output = new StringBuilder();
if (number == null) {
printNull(output);
} else {
printNumber(output, number);
}
return output.toString();
}
public static String printBoolean(final Boolean bool) {
final StringBuilder output = new StringBuilder();
if (bool == null) {
printNull(output);
} else {
printBoolean(output, bool);
}
return output.toString();
}
public static String printCollection(final Collection collection) {
final StringBuilder output = new StringBuilder();
if (collection == null) {
printNull(output);
} else {
printCollection(output, collection);
}
return output.toString();
}
public static String printArray(final Object array) {
final StringBuilder output = new StringBuilder();
if (array == null) {
printNull(output);
} else {
printArray(output, array);
}
return output.toString();
}
public static String printMap(final Map map) {
final StringBuilder output = new StringBuilder();
if (map == null) {
printNull(output);
} else {
printMap(output, map);
}
return output.toString();
}
public static String printObject(final Object object) {
final StringBuilder output = new StringBuilder();
if (object == null) {
printNull(output);
} else {
printObject(output, object);
}
return output.toString();
}
private static void print(final StringBuilder output, final Object object) {
if (object == null) {
printNull(output);
return;
}
if (object instanceof String) {
printString(output, (String) object);
return;
}
if (object instanceof Number) {
printNumber(output, (Number) object);
return;
}
if (object instanceof Boolean) {
printBoolean(output, (Boolean) object);
return;
}
if (object.getClass().isArray()) {
printArray(output, object);
return;
}
if (object instanceof Collection) {
printCollection(output, (Collection) object);
return;
}
if (object instanceof Map) {
printMap(output, (Map) object);
return;
}
if (object.getClass().isEnum()) {
printEnum(output, object);
return;
}
printObject(output, object);
}
private static void printNull(final StringBuilder output) {
output.append("null");
}
private static void printString(final StringBuilder output, final String str) {
output.append('\'');
escapeString(output, str);
output.append('\'');
}
private static void printNumber(final StringBuilder output, final Number number) {
output.append(number.toString());
}
private static void printBoolean(final StringBuilder output, final Boolean bool) {
output.append(bool.toString());
}
private static void printArray(final StringBuilder output, final Object arrayObj) {
output.append('[');
if (arrayObj instanceof Object[]) {
final Object[] array = (Object[]) arrayObj;
boolean first = true;
for (final Object element: array) {
if (first) {
first = false;
} else {
output.append(',');
}
print(output, element);
}
} else if (arrayObj instanceof boolean[]) {
final boolean[] array = (boolean[]) arrayObj;
boolean first = true;
for (final boolean element: array) {
if (first) {
first = false;
} else {
output.append(',');
}
print(output, Boolean.valueOf(element));
}
} else if (arrayObj instanceof byte[]) {
final byte[] array = (byte[]) arrayObj;
boolean first = true;
for (final byte element: array) {
if (first) {
first = false;
} else {
output.append(',');
}
print(output, Byte.valueOf(element));
}
} else if (arrayObj instanceof short[]) {
final short[] array = (short[]) arrayObj;
boolean first = true;
for (final short element: array) {
if (first) {
first = false;
} else {
output.append(',');
}
print(output, Short.valueOf(element));
}
} else if (arrayObj instanceof int[]) {
final int[] array = (int[]) arrayObj;
boolean first = true;
for (final int element: array) {
if (first) {
first = false;
} else {
output.append(',');
}
print(output, Integer.valueOf(element));
}
} else if (arrayObj instanceof long[]) {
final long[] array = (long[]) arrayObj;
boolean first = true;
for (final long element: array) {
if (first) {
first = false;
} else {
output.append(',');
}
print(output, Long.valueOf(element));
}
} else if (arrayObj instanceof float[]) {
final float[] array = (float[]) arrayObj;
boolean first = true;
for (final float element: array) {
if (first) {
first = false;
} else {
output.append(',');
}
print(output, Float.valueOf(element));
}
} else if (arrayObj instanceof double[]) {
final double[] array = (double[]) arrayObj;
boolean first = true;
for (final double element: array) {
if (first) {
first = false;
} else {
output.append(',');
}
print(output, Double.valueOf(element));
}
} else {
throw new IllegalArgumentException("Cannot print \"" + arrayObj + "\" of class " + arrayObj.getClass().getName() + " as an array");
}
output.append(']');
}
private static void printCollection(final StringBuilder output, final Collection collection) {
output.append('[');
boolean first = true;
for (final Object element: collection) {
if (first) {
first = false;
} else {
output.append(',');
}
print(output, element);
}
output.append(']');
}
private static void printMap(final StringBuilder output, final Map map) {
output.append('{');
boolean first = true;
for (final Map.Entry entry: map.entrySet()) {
if (first) {
first = false;
} else {
output.append(',');
}
printKeyValue(output, entry.getKey(), entry.getValue());
}
output.append('}');
}
private static void printKeyValue(final StringBuilder output, final Object key, final Object value) {
print(output, key);
output.append(':');
print(output, value);
}
private static void printObject(final StringBuilder output, final Object object) {
try {
final PropertyDescriptor[] descriptors =
Introspector.getBeanInfo(object.getClass()).getPropertyDescriptors();
final Map properties = new LinkedHashMap(descriptors.length + 1, 1.0f);
for (final PropertyDescriptor descriptor : descriptors) {
final Method readMethod = descriptor.getReadMethod();
if (readMethod != null) {
final String name = descriptor.getName();
if (!name.toLowerCase().equals("class")) {
final Object value = readMethod.invoke(object);
properties.put(name, value);
}
}
}
printMap(output, properties);
} catch (final IllegalAccessException e) {
throw new IllegalArgumentException("Could not perform introspection on object of class " + object.getClass().getName(), e);
} catch (final InvocationTargetException e) {
throw new IllegalArgumentException("Could not perform introspection on object of class " + object.getClass().getName(), e);
} catch (final IntrospectionException e) {
throw new IllegalArgumentException("Could not perform introspection on object of class " + object.getClass().getName(), e);
}
}
private static void printEnum(final StringBuilder output, final Object object) {
final Enum enumObject = (Enum) object;
final Class enumClass = object.getClass();
final Map properties = new LinkedHashMap(3, 1.0f);
properties.put("$type", enumClass.getSimpleName());
properties.put("$name", enumObject.name());
printMap(output, properties);
}
private static void escapeString(final StringBuilder output, final String str) {
if (str == null) {
return;
}
final int length = str.length();
for (int i = 0; i < length; i++) {
char c = str.charAt(i);
if (c > 0xfff) {
output.append("\\u" + Integer.toHexString(c));
} else if (c > 0xff) {
output.append("\\u0" + Integer.toHexString(c));
} else if (c > 0x7f) {
output.append("\\u00" + Integer.toHexString(c));
} else if (c < 32) {
switch (c) {
case '\n':
output.append("\\n");
break;
case '\r':
output.append("\\r");
break;
case '\t':
output.append("\\t");
break;
case '\b':
output.append("\\b");
break;
case '\f':
output.append("\\f");
break;
default :
if (c > 0xf) {
output.append("\\u00" + Integer.toHexString(c));
} else {
output.append("\\u000" + Integer.toHexString(c));
}
}
} else {
switch (c) {
case '\'':
output.append("\\'");
break;
case '"':
output.append("\\\"");
break;
case '\\':
output.append("\\\\");
break;
default :
output.append(c);
}
}
}
}
private JavaScriptUtils() {
super();
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy