org.apache.openjpa.kernel.exps.IndexOf Maven / Gradle / Ivy
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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 org.apache.openjpa.kernel.exps;
import org.apache.openjpa.kernel.StoreContext;
/**
* Find the index of one string within another.
* Index is 1-based.
*
* @author Abe White
*/
class IndexOf
extends Val {
private final Val _val;
private final Val _args;
/**
* Constructor. Provide target string and the arguments to the
* indexOf method.
*/
public IndexOf(Val val, Val args) {
_val = val;
_args = args;
}
public Class getType() {
return int.class;
}
public void setImplicitType(Class type) {
}
protected Object eval(Object candidate, Object orig,
StoreContext ctx, Object[] params) {
Object str = _val.eval(candidate, orig, ctx, params);
Object arg = _args.eval(candidate, orig, ctx, params);
int idx;
if (arg instanceof Object[]) {
Object[] args = (Object[]) arg;
idx = str.toString().indexOf(args[0].toString(),
((Number) args[1]).intValue() - 1) + 1;
} else
idx = str.toString().indexOf(arg.toString()) + 1;
return idx;
}
public void acceptVisit(ExpressionVisitor visitor) {
visitor.enter(this);
_val.acceptVisit(visitor);
_args.acceptVisit(visitor);
visitor.exit(this);
}
}