/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*
* 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.dashbuilder.common.client;
import java.util.HashSet;
import java.util.Set;
public class StringTemplateBuilder {
protected String keyPrefix;
protected String keySufix;
protected Set<String> keySet = new HashSet<>();
protected String sourceCode;
public StringTemplateBuilder() {
this("${", "}");
}
public StringTemplateBuilder(String keyPrefix, String keySufix) {
this.keyPrefix = keyPrefix;
this.keySufix = keySufix;
}
public void setTemplate(String template) {
this.sourceCode = template;
this.extractKeys();
}
public String getKeyPrefix() {
return keyPrefix;
}
public void setKeyPrefix(String keyPrefix) {
this.keyPrefix = keyPrefix;
}
public String getKeySufix() {
return keySufix;
}
public void setKeySufix(String keySufix) {
this.keySufix = keySufix;
}
public String build() {
return sourceCode;
}
public Set<String> keys() {
return keySet;
}
public String asVar(String key) {
return getKeyPrefix() + key + getKeySufix();
}
public StringTemplateBuilder replace(String key, String value) {
sourceCode = sourceCode.replace(keyPrefix + key + keySufix, value);
return this;
}
protected void extractKeys() {
this.keySet.clear();
if (sourceCode != null) {
int idx = 0;
int end = 0;
while (idx != -1 && end != -1) {
idx = sourceCode.indexOf(keyPrefix, end);
end = sourceCode.indexOf(keySufix, idx+keyPrefix.length());
if (idx != -1 && end != -1) {
String key = sourceCode.substring(idx + 2, end);
keySet.add(key);
}
}
}
}
}