com.googlecode.mjorm.mql.AbstractMqlFunction Maven / Gradle / Ivy
package com.googlecode.mjorm.mql;
public abstract class AbstractMqlFunction {
private String funcName = "unknown";
private int exactArgs = -1;
private int maxArgs = -1;
private int minArgs = -1;
private Class types[] = new Class[0];
private boolean initialized = false;
private boolean strictInitialization = true;
protected AbstractMqlFunction() {
initialized = false;
init();
if (funcName==null || funcName.trim().length()==0) {
throw new IllegalArgumentException("Invalid function name");
}
initialized = true;
}
protected abstract void init();
public String getName() {
return funcName;
}
protected void assertNotInitialized() {
if (strictInitialization && initialized) {
throw new IllegalStateException("Function "+funcName+" already initialized");
}
}
protected void assertArgumentTypes(Object[] arguments, Class type) {
for (int i=0; i[] types) {
if (arguments.length!=types.length) {
throw new IllegalArgumentException(
"Argument length doesn't match type length in function "+funcName);
}
for (int i=0; ilength) {
throw new IllegalArgumentException(
"Must have no more than "+length+" arguments in function "+funcName);
}
}
protected void assertCorrectNumberOfArguments(Object[] args) {
if (maxArgs!=-1) {
assertMaximumArgumentLength(args, maxArgs);
}
if (minArgs!=-1) {
assertMinimumArgumentLength(args, minArgs);
}
if (exactArgs!=-1) {
assertArgumentLength(args, exactArgs);
}
if (types.length==1) {
assertArgumentTypes(args, types[0]);
}
if (types.length>1) {
assertArgumentTypes(args, types);
}
}
/**
* @return the initialized
*/
protected boolean isInitialized() {
return initialized;
}
/**
* @return the strictInitialization
*/
protected boolean isStrictInitialization() {
return strictInitialization;
}
/**
* @param strictInitialization the strictInitialization to set
*/
protected void setStrictInitialization(boolean strictInitialization) {
this.strictInitialization = strictInitialization;
}
/**
* @return the functionName
*/
protected String getFunctionName() {
return funcName;
}
/**
* @param functionName the functionName to set
*/
protected void setFunctionName(String funcName) {
assertNotInitialized();
this.funcName = funcName;
}
/**
* @return the exactArgs
*/
protected int getExactArgs() {
return exactArgs;
}
/**
* @param exactArgs the exactArgs to set
*/
protected void setExactArgs(int exactArgs) {
assertNotInitialized();
this.exactArgs = exactArgs;
}
/**
* @return the maxArgs
*/
protected int getMaxArgs() {
return maxArgs;
}
/**
* @param maxArgs the maxArgs to set
*/
protected void setMaxArgs(int maxArgs) {
assertNotInitialized();
this.maxArgs = maxArgs;
}
/**
* @return the minArgs
*/
protected int getMinArgs() {
return minArgs;
}
/**
* @param minArgs the minArgs to set
*/
protected void setMinArgs(int minArgs) {
assertNotInitialized();
this.minArgs = minArgs;
}
/**
* @return the types
*/
protected Class[] getTypes() {
return types;
}
/**
* @param types the types to set
*/
protected void setTypes(Class... types) {
assertNotInitialized();
this.types = types;
}
}