httl.spi.codecs.AbstractJsonCodec Maven / Gradle / Ivy

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/*
 * Copyright 2011-2013 HTTL Team.
 *  
 * 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 httl.spi.codecs;

import httl.util.StringUtils;

import java.util.Arrays;

/**
 * Json Codec. (SPI, Singleton, ThreadSafe)
 * 
 * @author Liang Fei (liangfei0201 AT gmail DOT com)
 */
public abstract class AbstractJsonCodec extends AbstractCodec {

	private static final char[] NULL_CHARS = "null".toCharArray();

	private static final char[] TRUE_CHARS = "true".toCharArray();

	private static final char[] FALSE_CHARS = "false".toCharArray();

	private static final byte[] NULL_BYTES = "null".getBytes();

	private static final byte[] TRUE_BYTES = "true".getBytes();

	private static final byte[] FALSE_BYTES = "false".getBytes();

	private boolean jsonWithClass;

	protected boolean isJsonWithClass() {
		return jsonWithClass;
	}

	/**
	 * httl.properties: json.with.class=true
	 */
	public void setJsonWithClass(boolean jsonWithClass) {
		this.jsonWithClass = jsonWithClass;
	}

	public String getFormat() {
		return "json";
	}

	public boolean isValueOf(String str) {
		return StringUtils.isNotEmpty(str) 
				&& (str.startsWith("{") || str.startsWith("[")
				|| (str.startsWith("\"") && str.endsWith("\""))
				|| (str.startsWith("\'") && str.endsWith("\'"))
				|| StringUtils.isNumber(str) || "null".equals(str) 
				|| "true".equals(str) || "false".equals(str));
	}

	public boolean isValueOf(char[] str) {
		return StringUtils.isNotEmpty(str) 
				&& (str[0] == '{' || str[0] == '['
				|| (str.length > 1 && str[0] == '\"' && str[str.length - 1] == '\"')
				|| (str.length > 1 && str[0] == '\'' && str[str.length - 1] == '\'')
				|| StringUtils.isNumber(str) || Arrays.equals(NULL_CHARS, str) 
				|| Arrays.equals(TRUE_CHARS, str) || Arrays.equals(FALSE_CHARS, str));
	}

	public boolean isValueOf(byte[] str) {
		return StringUtils.isNotEmpty(str) 
				&& (str[0] == '{' || str[0] == '['
				|| (str.length > 1 && str[0] == '\"' && str[str.length - 1] == '\"')
				|| (str.length > 1 && str[0] == '\'' && str[str.length - 1] == '\'')
				|| StringUtils.isNumber(str) || Arrays.equals(NULL_BYTES, str) 
				|| Arrays.equals(TRUE_BYTES, str) || Arrays.equals(FALSE_BYTES, str));
	}

}