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/*
* 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 groovy.lang;
import org.codehaus.groovy.runtime.GStringImpl;
import org.codehaus.groovy.runtime.InvokerHelper;
import org.codehaus.groovy.runtime.StringGroovyMethods;
import java.io.IOException;
import java.io.Serializable;
import java.io.StringWriter;
import java.io.Writer;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Pattern;
/**
* Represents a String which contains embedded values such as "hello there
* ${user} how are you?" which can be evaluated lazily. Advanced users can
* iterate over the text and values to perform special processing, such as for
* performing SQL operations, the values can be substituted for ? and the
* actual value objects can be bound to a JDBC statement. The lovely name of
* this class was suggested by Jules Gosnell and was such a good idea, I
* couldn't resist :)
*
* @author James Strachan
*/
public abstract class GString extends GroovyObjectSupport implements Comparable, CharSequence, Writable, Buildable, Serializable {
static final long serialVersionUID = -2638020355892246323L;
/**
* A GString containing a single empty String and no values.
*/
public static final GString EMPTY = new GString(new Object[0]) {
public String[] getStrings() {
return new String[]{""};
}
};
private Object[] values;
public GString(Object values) {
this.values = (Object[]) values;
}
public GString(Object[] values) {
this.values = values;
}
// will be static in an instance
public abstract String[] getStrings();
/**
* Overloaded to implement duck typing for Strings
* so that any method that can't be evaluated on this
* object will be forwarded to the toString() object instead.
*/
public Object invokeMethod(String name, Object args) {
try {
return super.invokeMethod(name, args);
}
catch (MissingMethodException e) {
// lets try invoke the method on the real String
return InvokerHelper.invokeMethod(toString(), name, args);
}
}
public Object[] getValues() {
return values;
}
public GString plus(GString that) {
List stringList = new ArrayList();
List